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The quantum Zeno effect -- suppression of decay by frequent measurements -- was believed to occur only when the response of the detector is so quick that the initial tiny deviation from the exponential decay law is detectable. However, we…

Quantum Physics · Physics 2009-11-10 Kazuki Koshino , Akira Shimizu

The quantum Zeno effect is a striking feature of quantum mechanics with foundational implications and practical applications in quantum control, error suppression, and error correction. In recent years, the effect has branched off into a…

Quantum Physics · Physics 2025-09-19 Sacha Greenfield , Archana Kamal , Justin Dressel , Eli Levenson-Falk

We describe the influence of continuous measurement in a decaying system and the role of the distance from the detector to the initial location of the system. The detector is modeled first by a step absorbing potential. For a close and…

Quantum Physics · Physics 2009-11-13 F. Delgado , J. G. Muga , G. Garcia-Calderon

The quantum Zeno effect (QZE) is the striking prediction that the decay of any unstable quantum state can be inhibited by sufficiently frequent observations (measurements). The consensus opinion has upheld the QZE as a general feature of…

Quantum Physics · Physics 2017-03-28 A. G. Kofman , G. Kurizki

Simply speaking quantum Zeno effect for an unstable quantum system represents total decay probability decrease by frequent decay detection. Analogously simply speaking quantum anti-Zeno effect for an unstable quantum system represents total…

Quantum Physics · Physics 2024-04-29 Vladan Pankovic

It is shown that in a simple coupler where one of the waveguides is subject to controlled losses of the electric field, it is possible to observe optical analog of the linear and nonlinear quantum Zeno effects. The phenomenon consists in a…

Optics · Physics 2015-05-27 F. Kh. Abdullaev , V. V. Konotop , V. S. Shchesnovich

The quantum Zeno effect is deeply related to the quantum measurement process and thus studies of it may help shed light on the hitherto mysterious measurement process in quantum mechanics. Recently, the spatial quantum Zeno effect is…

Quantum Physics · Physics 2018-12-06 Xin Zhang , Chang Xu , Zhongzhou Ren , Jie Peng

Under certain assumptions it is shown that the decay of level 2 of a three-level system onto level 1 is slowed down because of the further decay of level 1 onto level 0. It is argued that this phenomenon may be interpreted as a consequence…

Quantum Physics · Physics 2009-10-31 Michael B. Mensky

The evolution of a quantum system under observation becomes retarded or even impeded. We review this ``quantum Zeno effect'' in the light of the criticism that has been raised upon a previous attempt to demonstrate it, of later…

Quantum Physics · Physics 2009-11-06 Peter E. Toschek , Christof Wunderlich

We point out that the quantum Zeno effect, i.e., inhibition of spontaneous decay by frequent measurements, is observable only in spectrally finite reservoirs, i.e., in cavities and waveguides, using a sequence of evolution-interrupting…

Quantum Physics · Physics 2007-05-23 A. G. Kofman , G. Kurizki

Frequent applications of a mixing quantum operation to a quantum system slow down its time evolution and eventually drive it into the invariant subspace of the named operation. We prove this phenomenon, the quantum Zeno effect, and its…

Quantum Physics · Physics 2024-09-11 Robert Salzmann

The phenomenon of quantum interrogation allows one to optically detect the presence of an absorbing object, without the measuring light interacting with it. In an application of the quantum Zeno effect, the object inhibits the otherwise…

Quantum Physics · Physics 2009-10-31 P. G. Kwiat , A. G. White , J. R. Mitchell , O. Nairz , G. Weihs , H. Weinfurter , A. Zeilinger

As a classical state, for instance a digitized image, is transferred through a classical channel, it decays inevitably with the distance due to the surroundings' interferences. However, if there are enough number of repeaters, which can…

Data Analysis, Statistics and Probability · Physics 2009-12-07 Shi-Jian Gu , Li-Gang Wang , Zhi-Guo Wang , Hai-Qing Lin

The evolution of a quantum system is supposed to be impeded by measurement of an involved observable. This effect has been proven indistinguishable from the effect of dephasing the system's wave function, except in an individual quantum…

Quantum Physics · Physics 2009-11-07 Chr. Balzer , R. Huesmann , W. Neuhauser , P. E. Toschek

The quantum Zeno effect is the prediction, going back to Alan Turing, that the decay of an unstable system can be slowed down by measuring it frequently enough. It was also noticed later that the opposite effect, i.e., enhancement of the…

Statistical Mechanics · Physics 2020-09-10 Sergey Belan , Vladimir Parfenyev

The behavior displayed by a quantum system when it is perturbed by a series of von Neumann measurements along time is analyzed. Because of the similarity between this general process with giving a deck of playing cards a shuffle, here it is…

Quantum Physics · Physics 2012-02-07 A. S. Sanz , C. Sanz-Sanz , T. Gonzalez-Lezana , O. Roncero , S. Miret-Artes

Prevention of a quantum system's time evolution by repetitive, frequent measurements of the system's state has been called the quantum Zeno effect (or paradox). Here we investigate theoretically and numerically the effect of repeated…

Quantum Physics · Physics 2011-08-04 B. Kaulakys , V. Gontis

The Zeno and anti-Zeno effects are features of measurement-driven quantum evolution where frequent measurement inhibits or accelerates the decay of a quantum state. Either type of evolution can emerge depending on the system-environment…

Quantum Physics · Physics 2017-06-21 P. M. Harrington , J. T. Monroe , K. W. Murch

We present a decoherence-based interpretation for the quantum Zeno effect (QZE) where measurements are dynamically treated as dispersive couplings of the measured system to the apparatus, rather than the von Neumann's projections. It is…

Quantum Physics · Physics 2012-04-13 D. Z. Xu , Q. Ai , C. P. Sun

In this work we consider quantum dynamical interaction of single photon with beam splitter after which well-known superposition between reflected and transmitted photon appears. Later reflected photon is absorbed by one and transmitted…

General Physics · Physics 2021-06-23 Vladan Pankovic
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