The watched pot and the willing mind

A story wants a scene in which a seer ruins the vision by wanting it, and a physicist wants to know which parts of that intuition survive contact with a laboratory. The answer is stranger than either camp expects. Frequent measurements cause the quantum Zeno effect, a reduction in transitions away from the system’s initial state [1]. Measurements applied more slowly could also enhance decay rates [1]. And the contemplative literature really does contain an old rule, stated by Mencius, that virtue is realised not by trying but by letting it realise itself [2]. What the two do not share is a scale, a timescale or an operator. This paper states the effect precisely, states the contemplative claim at its strongest, and then marks the exact line where the comparison stops being physics.

The rule the paper defends is narrow. The quantum Zeno effect is a laboratory fact about microscopic systems that are measured repeatedly on a timescale short compared with their own evolution: by its nature, the effect appears only in systems with distinguishable quantum states, and hence is inapplicable to classical phenomena and macroscopic bodies [1]. The contemplative claim is a rule about a person’s attention, and it is supported, where it is supported at all, by what practitioners report rather than by an instrument. Saying that the two are the same phenomenon would be wrong. Saying that the physicist has nothing to say to the novelist would also be wrong, because the effect teaches one precise lesson about timing that the contemplative tradition arrived at by an entirely different route, and that lesson is worth having.

What repeated measurement actually does to a system

In quantum mechanics, frequent measurements cause the quantum Zeno effect, a reduction in transitions away from the system’s initial state, slowing a system’s time evolution [1]. The name is borrowed from an old paradox: an arrow in flight is not seen to move during any single instant, and the conclusion drawn from that was that it cannot possibly be moving at all [1]. The physics behind the joke is a small piece of algebra, and it is worth stating exactly, because most of the arguments about what the effect means start by getting it slightly wrong.

Take a system sitting in a state that is an eigenstate of whatever you are measuring, and suppose that left alone it would decay into some other state with a certain probability. Make one measurement, and the wave function collapses to an eigenstate of the measurement basis [1]. Between two measurements the system drifts away from that eigenstate into a superposition of the initial state and the other one. Measure again and it collapses either back where it started or into the other state. The probability that it collapses into the other state after a very short amount of time is proportional to the square of that time, since probabilities are proportional to squared amplitudes and amplitudes behave linearly [1]. So in the limit of a large number of short intervals, with a measurement at the end of every interval, the probability of making the transition goes to zero [1].

That quadratic is the whole engine, and everything else in the literature is a consequence of it. The folk version of the effect is the watched pot that never boils, and the algebra is the reason the saying turns out to be closer to the truth than its reputation deserves. Unstable quantum systems are predicted to exhibit a short-time deviation from the exponential decay law, and it is precisely in that window that frequent measurements inhibit the decay [1]. A walker who checks a system too rarely lets the drift accumulate. A walker who checks every moment resets it before the drift has anywhere to go.

The mathematical treatment was given in 1977 by Baidyanath Misra and E. C. George Sudarshan, who presented a mathematical analysis of this quantum effect and proposed its association with Zeno’s arrow paradox [1]. The idea itself was implicit in von Neumann’s earlier work on the reduction postulate, and the Zeno effect of a single system was shown to be equivalent to the indeterminacy of the quantum state of a single system [1]. The name comes by analogy to Zeno’s arrow paradox, which states that because an arrow in flight is not seen to move during any single instant, it cannot possibly be moving at all [1]. Experimental confirmation did not appear until 1990, when Itano and co-workers applied the idea to oscillating systems rather than unstable ones, driving a transition between two levels in trapped beryllium ions while measuring absorption of laser pulses proportional to the population of the lower level [1].

The demonstration most often described took a different route. In 1989 Wineland’s group at NIST observed the quantum Zeno effect for a two-level atomic system that was interrogated during its evolution, and approximately 5,000 beryllium ions were stored in a cylindrical Penning trap and laser-cooled to below 250 mK [1]. A resonant radio-frequency pulse would, on its own, have moved the entire ground-state population into the excited state [1]. Instead the trap was regularly probed by a sequence of ultraviolet pulses during that pulse, and the ultraviolet pulses suppressed the evolution of the system into the excited state [1]. The results were in good agreement with theoretical models [1]. In 2015, Mukund Vengalattore and his group at Cornell University demonstrated a quantum Zeno effect as the modulation of the rate of quantum tunnelling in an ultracold lattice gas by the intensity of light used to image the atoms [1].

Penning. Photo: Ulfbastel / Wikimedia Commons. A Penning trap diagram: one positive ion held at the centre between curved electrodes by two fields. Source

One point is often skipped and matters for everything that follows. The thing that does the freezing does not have to be a mind. An observation can simply be the absorption of a particle, without the need of an observer in any conventional sense [1]. Closely related to the effect, and sometimes not distinguished from it, is the watchdog effect, in which the time evolution of a system is affected by its continuous coupling to the environment [1]. In physics the word measurement covers the absorption of a photon at some wavelength and the relaxation of a particle as it enters some region, and the Zeno effect appears wherever that word applies [1]. Anyone who wants to transfer the effect to a human mind has to deal with this first, because it removes the most seductive version of the mistake before it can be made.

The cadence can run the other way

The same quadratic that produces the frozen state produces its opposite when the intervals are wrong. It was predicted that measurements applied more slowly could also enhance decay rates, a phenomenon known as the quantum anti-Zeno effect [1]. This is the part of the physics that a novel about striving should pay attention to, because it says that the sign of the effect is a function of timing and not of effort as such. The same act of intervening, done at the wrong cadence, does not merely fail to help. It pushes the system out of its initial state faster than leaving it alone would have.

That prediction was confirmed in the same laboratory that found the effect in an unstable system. In 2001 Raizen’s group at the University of Texas at Austin observed the quantum Zeno effect for an unstable quantum system, as originally proposed by Sudarshan and Misra, and also observed an anti-Zeno effect [1]. Ultracold sodium atoms were trapped in an accelerating optical lattice and the loss due to tunnelling was measured, with the evolution interrupted by reducing the acceleration, which stopped the quantum tunnelling [1]. The group observed suppression or enhancement of the decay rate depending on the regime of measurement [1].

Ultracold atoms. Photo: National Institute of Standards and Technology / Wikimedia Commons. An absorption image of an ultracold atom cloud, five micrometres across, after fifteen microseconds. Source

The primary report of that experiment is unusually explicit about what the frequency does. Fischer and his colleagues report the first observation of the Quantum Zeno and Anti-Zeno effects in an unstable system [3]. Cold sodium atoms were trapped in a far-detuned standing wave of light that is accelerated for a controlled duration, and for a large acceleration the atoms can escape the trapping potential via tunnelling [3]. The number of trapped atoms was repeatedly measured during the initial period of non-exponential decay, and depending on the frequency of the measurements the observed decay is suppressed or enhanced [3]. The programmer’s warning is in the same sentence as the result: pick the wrong interval and the suppression turns into acceleration.

The effect also has a ceiling, and the ceiling is set by the time-energy uncertainty relation. If one wants to make the measurement process more and more frequent, one has to correspondingly decrease the time duration of the measurement itself [1]. The request that the measurement last only a very short time implies that the energy spread of the state in which reduction occurs becomes increasingly large [1]. The deviations from the exponential decay law for small times are related to the inverse of the energy spread, so the region in which the deviations are appreciable shrinks as the measurement duration shrinks [1]. An explicit evaluation of these two competing requests shows that it is inappropriate, without taking into account this basic fact, to deal with the actual occurrence of the effect [1]. You cannot simply measure faster and faster forever.

What the effect is really made of was clarified by decoherence theory. According to decoherence theory, measurement of a system is not a one-way collapse but an interaction with its surrounding environment [1]. A measurement is equivalent to correlating or coupling the quantum state to the apparatus state in such a way as to register the measured information [1]. Frequent measurement re-establishes or strengthens that coupling, and with it the measured state, if it is frequent enough for the probability to remain low [1]. In this picture an ideal Zeno effect corresponds to the mathematical limit where a quantum system is continuously coupled to the environment, where that coupling is infinitely strong, and where the environment is an infinitely large source of thermal randomness [1]. The frozen pot is not held by a gazer. It is held by an environment too vast and too noisy to let go.

The researchers who worked on this question are not shy about where the effect lives. Kurizki and his coworkers developed a theory of decay and decoherence control that exploits two opposing universal effects [4], and the difference between them is the whole of the warning a novelist needs. And the boundary statement is blunt: by its nature, the effect appears only in systems with distinguishable quantum states, and hence is inapplicable to classical phenomena and macroscopic bodies [1]. That sentence is the hinge of this entire paper, and it will be returned to when the two domains are finally brought together.

A tradition that already said effort spoils the result

The contemplative claim did not begin with the physics, and it did not borrow the physics. It is old, it is internally consistent, and it makes a different kind of statement. Wu wei is a concept from ancient Chinese philosophy that literally means not-acting or non-doing, variously interpreted and translated as actionlessness, inaction, or effortless action [2]. In the Taoist reading it names the manner in which the Way acts, silently, without notice, apparently motionless and effortless, and Taoists aspire to live their lives in alignment with such a harmonious state of free flowing and unforced activity [2].

The strongest form of the claim is the Confucian one, and it is not about passivity. Slingerland argues that wu wei in the Confucian sense has to be attained [2]. But in the Confucian conception of virtue, virtue can only be attained by not consciously trying to attain it [2]. Mencius believed that men are already good, and need only realize it not by trying, but by allowing virtue to realize itself, and coming to love the Way [2]. The tradition therefore claims something quite precise: that the outcome is reachable by the person who stops reaching for it, and that active striving is not a weaker version of the same route but an obstruction on it. A willing mind is not a machine that happens to be thinking, in this picture. It is a system whose own effort is the thing that gets in the way.

The ancient texts make the negative half of the claim explicit. Laozi condemns doing and grasping, urging the reader to cognitively grasp oneness, reduce desires and the size of the state, leaving human nature untouched [2]. That is the structure the novelist needs: a named obstacle standing between the effort and the result. Modern readers of the same texts render it in the language of force. Alan Watts believed that wu wei can be described as not-forcing [2]. In the same tradition everything is happening naturally, without a conscious effort on the part of the individual [2]. Slingerland himself argues that the idea of wu wei predated the term, dating it back to the era of the Classic of Poetry [2], which is a reminder that the claim is older than its vocabulary.

Lao Tzu - Project Gutenberg eText 15250. Photo: Unknown authorUnknown author / Wikimedia Commons. The traditional portrait of Laozi, the bearded sage in a red outer robe over blue. Source

Meditation research has learned to describe the same phenomenon without the metaphysics. Researchers distinguish practices that hold an object in mind from a third family that Shear calls automatic self-transcending, in which there is no attempt to sustain any particular condition at all [5]. Practices of this kind, once started, are reported to automatically transcend their own activity and disappear, to be started up again later if appropriate [5]. The same researcher notes that experienced practitioners of Zen and Qigong reach this state once they had become effortless and automatic through years of practice [5]. The practical instruction hidden in that description is exactly the one the novelist wants: hold nothing, sustain nothing, and let the activity stop being an activity.

The vocabulary of samadhi describes the destination of that practice, and a common understanding regards samadhi as meditative absorption [6]. Philosophical accounts of intentionality use a related word: intentionality is the mental ability to refer to or represent something [7]. A determined search for a particular content is still a search for content, and on this account it has not left the domain of striving at all. It is worth saying plainly what has and has not been shown here. The contemplative literature supplies a rule, a long history and a vocabulary for the phenomenon it describes. It does not supply an instrument, and none of the statements above claim that it does.

The protocols that told the viewer not to push

The closest thing to a laboratory version of the rule sits in a research programme that ran for twenty years and ended badly. Physicists Russell Targ and Harold Puthoff, parapsychology researchers at Stanford Research Institute, are generally credited with coining the term remote viewing to distinguish it from the closely related concept of clairvoyance [8]. According to Targ, the term was first suggested by Ingo Swann in December 1971 during an experiment at the American Society for Psychical Research in New York City [8].

Swann is commonly credited with proposing the idea of controlled remote viewing, a process in which viewers would view a location given nothing aside from its geographical coordinates, which was developed and tested by Puthoff and Targ with CIA funding [9]. Look at what that protocol does. The viewer is given coordinates and nothing else. The viewer is not given a target image, a category, a hint about what kind of place it is. Whatever arrives has to arrive without a question to answer, because the question itself would supply the answer’s shape. For a protocol designed to detect information at a distance, the single most dangerous thing the apparatus could do is tell the viewer what it wants.

Scotland topographic map-fr. Photo: Eric Gaba (Sting – fr:Sting) / Wikimedia Commons. A printed topographic map of Scotland, with relief shading, roads, towns and a height scale. Source

The programme that grew around this method is the one the public knows. Joseph McMoneagle was among the first personnel recruited for the classified program now known as the Stargate Project [10]. From 1978 he was known as Remote Viewer No. 1 at Project Stargate, the psychic intelligence unit at Fort Meade, Maryland [10]. The idea of remote viewing received renewed attention in the 1990s upon the declassification of documents related to the Stargate Project, a research program sponsored by the U.S. government that attempted to determine potential military applications of psychic phenomena [8]. The programme ran from 1975 to 1995 and ended after evaluators concluded that remote viewers consistently failed to produce actionable intelligence information [8].

The literature of the field is careful to say that this was a method, not a result. Remote viewing experiments have historically lacked proper controls and repeatability [8]. That sentence sits in the standard reference article on the subject, not in a hostile footnote, and a writer who wants to give the strongest hearing to the pro side has to begin from it. Parapsychology is criticized as a pseudoscience, the majority of mainstream scientists reject it [11], and it has been criticized for continuing investigation despite being unable to provide reproducible evidence for the existence of any psychic phenomena after more than a century of research [11]. A century is a long time to have produced nothing, and the rule about not pushing is not a substitute for a result.

The honest summary of this section is narrow. The controlled protocol exists and is described in the standard sources, in which viewers would view a location given nothing aside from its geographical coordinates [9]. What those sources do not contain, and what this paper therefore does not claim, is the working literature of the programme’s own training manuals, in which practitioners are said to warn beginners not to force a result. That material was not archived here, so it is reported as the field’s own account of itself and not as a quotation with a page number.

Why the brain is not a laboratory

The decisive objection to the transferred analogy is not philosophical. It is a number, and the number is unkind. Tegmark computed neural decoherence rates and found that the decoherence timescales are typically much shorter than the relevant dynamical timescales, both for regular neuron firing and for kink-like polarization excitations in microtubules [12]. Tegmark argues that the degrees of freedom of the human brain that relate to cognitive processes should be thought of as a classical rather than quantum system [12]. The gap between those two numbers is what turns the calculation into a conclusion rather than a footnote.

Neuron ar. Photo: Wikimedia Commons. A neuron with its cell body, axon and myelin sheath, the part names written in Arabic. Source

A Zeno effect needs a system whose quantum state survives long enough to be projected back. There is no such window when the decoherence timescales are typically much shorter than the relevant dynamical timescales, and the degrees of freedom of the human brain that relate to cognitive processes should be thought of as a classical rather than quantum system [12]. This is not a technicality at the edge of the analogy. It is the difference between a system that can be frozen and a system that is never in a state that could be frozen.

The decoherence picture says why, in general terms. Decoherence represents an extremely fast process for macroscopic objects, since these are interacting with many microscopic objects, with an enormous number of degrees of freedom in their natural environment [13]. The process is needed if we are to understand why we tend not to observe quantum behavior in everyday macroscopic objects [13]. The interaction with the environment also selects which basis a system appears to be in, a mechanism called environmentally-induced superselection, or einselection [13]. A brain is not a delicate isolated system in a vacuum. In humans, the cerebral cortex contains approximately 14-16 billion neurons, and each neuron is connected by synapses to several thousand other neurons [14].

The word observer carries the rest of the confusion. In physics the observer effect is the disturbance of a system by the act of observation [15]. The quantum mechanical observer is tied to the issue of observer effect, where a measurement necessarily requires interacting with the physical object being measured, affecting its properties through the interaction [16]. Some interpretations do posit a central role for an observer of a quantum phenomenon [16]. The double-slit experiment has been interpreted by some to suggest that a conscious mind can directly affect reality [15]. That last reading is an interpretation of an interpretation, and critics of the special role of the observer point out that it is not clear how much consciousness is required [16]. The effect reported in this paper does not need any of it, because an observation can simply be the absorption of a particle, without the need of an observer in any conventional sense [1].

The interface where the two descriptions meet is the measurement problem, which is the problem of definite outcomes: quantum systems have superpositions but quantum measurements only give one definite result [17]. The measurement problem concerns what that something is, how a superposition of many possible values becomes a single measured value [17]. Zeno dynamics live at this interface and exploit it. Each measurement causes the wavefunction to collapse to an eigenstate of the measurement basis [1]. That is precisely why it cannot be lifted to a level of description where reduction has no purchase.

Where the analogy holds and where it breaks

There is a defensible cross-domain sense, and it is worth stating it exactly. In both domains the claim is about timing rather than about effort as such. In the physics, frequent measurements during this nonexponential period could inhibit decay of the system [1], while measurements applied more slowly could also enhance decay rates [1]. In the contemplative rule, virtue can only be attained by not consciously trying to attain it [2]. The structural parallel is exact at the level of the sentence, and it is the part of the comparison that survives scrutiny.

Stopwatch, 1810201155, ako. Photo: Ansgar Koreng / Wikimedia Commons. A silver pocket stopwatch with a sixty-second dial and a small seconds register. Source

Three further correspondences hold. First, both sides insist on a distinction between a state that persists because nothing is done to it and a state that persists because something is continuously done to it, since frequent measurement re-establishes or strengthens the coupling, and with it the measured state, if frequent enough for the probability to remain low [1]. Second, both sides carry an explicit warning that the effect reverses if the timing is wrong, and the physics states the reversal as a measured result rather than as a footnote: depending on the frequency of the measurements the observed decay is suppressed or enhanced [3]. Third, both sides treat the holder as part of the system, since an ideal quantum Zeno effect corresponds to the mathematical limit where a quantum system is continuously coupled to the environment [1], and the practitioner’s own attention is what holds the contemplative one.

Here is where it breaks, and the break is not a matter of degree. The physics requires distinguishable quantum states, and by its nature the effect appears only in systems that have them, which makes it inapplicable to classical phenomena and macroscopic bodies [1]. Tegmark’s calculation of neural decoherence rates indicates that for the degrees of freedom of the human brain that relate to cognitive processes the decoherence timescales are typically much shorter than the relevant dynamical timescales [12]. There is no projective measurement of intention in the theory, no operator standing between a wish and a neuron, and critics of the special role of the observer point out that it is not clear how much consciousness is required [16].

There is a second, quieter break. The Zeno effect is a statement about a physical system that is not trying to do anything. The contemplative rule is a statement about a person who is trying. That difference is what the anti-Zeno result makes expensive, because the sign of the effect is set by the interval and a badly timed intervention is simply one at the wrong frequency: depending on the frequency of measurements we observe a decay that is suppressed or enhanced as compared to the unperturbed system [3]. In a person, a badly timed intervention is a person wanting the wrong thing. The analogy therefore licenses a weaker conclusion than the one it is usually asked to license. It says that premature effortful handling of a process can spoil it, which is true in both domains, and it does not say that the mechanism is shared.

The pattern of the argument is familiar in the psychology of expectation, and it is worth naming because it is the mechanism most likely to produce an apparent confirmation. Confirmation bias is the tendency to search for, interpret, favor and recall information in a way that confirms or supports one’s prior beliefs, values, or decisions [18]. People display this bias when they select information that supports their views, ignoring contrary information, or when they interpret ambiguous evidence as supporting their existing attitudes [18]. The placebo effect is the measured difference between the response to an inactive treatment and no treatment at all [19]. Cold reading is a set of techniques used by mentalists, psychics, fortune-tellers, and mediums, which psychologists believe appears to work because of the Barnum effect and due to confirmation biases within people [20]. A viewer who is told to relax may simply report more, and report it more vividly, and be credited for a hit.

None of this settles the contemplative claim, and the paper should not pretend otherwise. It does settle the question this paper was asked, which was where the line lies. The line lies between a system in which frequent measurements during this nonexponential period could inhibit decay and a person who is told to stop asking for a particular one [1]. On one side there is an experiment in which approximately 5,000 beryllium ions were stored in a cylindrical Penning trap and laser-cooled to below 250 mK [1]. On the other side there is a rule according to which virtue can only be attained by not consciously trying to attain it [2].

Connecting the Dots

Three threads run through this paper, and it is worth naming them together. The first is the quadratic. It is the reason the effect exists at all, and it is the reason measurements applied more slowly could also enhance decay rates rather than suppress them [1]. The second is the environment. The thing that freezes a quantum system is not a gaze, because measurement of a system is not a one-way collapse but an interaction with its surrounding environment [1]. The third is the rule about effort, according to which men are already good, and need only realize it not by trying, but by allowing virtue to realize itself [2].

The dot between the second and the third is the place where a novelist is most tempted and most at risk. The environment holds the state. A person’s attention holds the experience. Both are couplings to something larger than the thing being held. An ideal quantum Zeno effect corresponds to the mathematical limit where a quantum system is continuously coupled to the environment [1]. Only the first of those couplings has a timescale attached to it, and that timescale is the reason the comparison can be stated and the reason it fails.

Optical fiber cable-01ASD. Photo: Asurnipal / Wikimedia Commons. A fibre optic cable stripped back, its coloured fibres and steel strength strands exposed. Source

The dot between the first and the third is sharper still. If the sign of the effect depends on the interval, since measurements applied more slowly could also enhance decay rates [1], then a rule that says do less, wait, do not push, is not a special case of the Zeno effect. It is a different rule that happens to share a shape. Shapes are what metaphors are made of, and metaphors are what a novelist needs. What a novelist must not do is let the shape carry the authority of the measurement.

The Other Side

The strongest case for reading the two together is not that the physics explains the contemplative claim. It is that both are warning against a specific and common error, namely the belief that more input produces more output. In a quantum system, frequent measurements cause a reduction in transitions away from the initial state, while measuring more slowly was predicted to enhance decay rates instead [1]. In the Confucian conception of virtue, virtue can only be attained by not consciously trying to attain it, and the tradition says so without needing the physics [2].

The second and fairest case is historical in spirit if not in fact. The controlled protocol gives the viewer a location and nothing aside from its geographical coordinates [9]. That is an experimental design in which the question is withheld from the answerer, and it is the same move the Zeno picture makes, where the intervention is designed to add nothing but its own timing. The two designs share an intuition about what contaminates a result, and they arrived at it independently, for reasons that have nothing to do with one another: the programme that refined the first of them ran from 1975 to 1995 and ended after evaluators concluded that remote viewers consistently failed to produce actionable intelligence information [8].

The third case is the one the owner of this material cares about, and it is the weakest. If a character is told to stop wanting, and the wanting is a real physical act of attention in a brain whose decoherence timescales are typically much shorter than the relevant dynamical timescales [12], then the instruction may still work for reasons that have nothing to do with quantum mechanics: it may work because it stops the performer from manufacturing the answer. On this reading the Zeno framing is not an explanation but a stage direction, and a director is free to use a false stage direction if the actor obeys it.

That is the honest position. There is a defensible cross-domain sense in which measuring too hard can prevent the outcome while non-intervention permits it, because frequent measurements during the nonexponential period could inhibit decay of the system [1], and the sense is a sense about timing rather than about physics. It is strictly a seductive analogy as a mechanism, and it is a usable one as a discipline.

Zen Garden at Ryōan-ji (1992-10 by sodai-gomi). Photo: sodai gomi / Wikimedia Commons. The raked gravel garden at Ryoanji, with rows of seated visitors watching from the veranda. Source

What We Actually Know

Established, measured, and not in dispute: in quantum mechanics, frequent measurements cause the quantum Zeno effect, a reduction in transitions away from the system’s initial state [1]. In 1977, Baidyanath Misra and E. C. George Sudarshan presented a mathematical analysis of this quantum effect [1]. Experimental confirmation did not appear until 1990 [1]. The anti-Zeno effect is the name for the case in which measurements applied more slowly enhance decay rates [1]. It was observed in the same unstable system, since depending on the frequency of measurements we observe a decay that is suppressed or enhanced [3]. By its nature, the effect appears only in systems with distinguishable quantum states, and hence is inapplicable to classical phenomena and macroscopic bodies [1]. For the degrees of freedom of the human brain that relate to cognitive processes, the decoherence timescales are typically much shorter than the relevant dynamical timescales [12]. Remote viewing experiments have historically lacked proper controls and repeatability [8]. Parapsychology has been criticized for continuing investigation despite being unable to provide reproducible evidence for the existence of any psychic phenomena after more than a century of research [11]. In the Confucian conception of virtue, virtue can only be attained by not consciously trying to attain it [2].

Oscilloscope-voltcraft hg. Photo: Hannes Grobe / Wikimedia Commons. A handheld oscilloscope switched on, a triangular trace drawn across its screen. Source

Established about the physics but not transferable: that the freezing is done by an environment rather than by a watcher, since an observation can simply be the absorption of a particle [1]. That the analogy breaks at the scale, because the decoherence timescales are typically much shorter than the relevant dynamical timescales and there is no window in which a brain’s coherence could be projected back [12]. That a rule about not striving is a claim about what people report, since people interpret ambiguous evidence as supporting their existing attitudes [18].

Not established, and not claimed here: that the quantum Zeno effect explains remote viewing, precognition or any other reported ability, which would need the reproducible evidence the field has not produced after more than a century of research [11]. That the training literature of the remote-viewing programmes forbids forcing a result, which is reported here as the field’s account of itself and not quoted from an archived text, since the sources this paper can archive describe a process in which viewers would view a location given nothing aside from its geographical coordinates [9]. That a badly timed intervention always helps the seeker, which the anti-Zeno effect contradicts at the level of the analogy itself, since depending on the frequency of the measurements the observed decay is suppressed or enhanced [3].

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