Photons are lying about where they have been, again

Gregory Reznik; Carlotta Versmold; Jan Dziewior; Florian Huber; Shrobona Bagchi; Harald Weinfurter; Justin Dressel; Lev Vaidman

doi:10.1016/j.physleta.2023.128782

Photons are lying about where they have been, again

Gregory Reznik^*, Carlotta Versmold, Jan Dziewior, Florian Huber, Shrobona Bagchi, Harald Weinfurter, Justin Dressel, Lev Vaidman

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

Bhati and Arvind (2022) [5] recently argued that in a specially designed experiment the timing of photon detection events demonstrates photon presence at a location at which they are not present according to the weak value approach. The alleged contradiction is resolved by a subtle interference effect resulting in anomalous sensitivity of the signal imprinted on the postselected photons for the interaction at this location, similarly to the case of a nested Mach-Zehnder interferometer with a Dove prism (Alonso and Jordan (2015) [7]). We perform an in-depth analysis of the characterization of the presence of a pre- and postselected particle at a particular location based on information imprinted on the particle itself. The theoretical results are tested by a computer simulation of the proposed experiment.

Original language	English
Article number	128782
Journal	Physics Letters, Section A: General, Atomic and Solid State Physics
Volume	470
DOIs	https://doi.org/10.1016/j.physleta.2023.128782
State	Published - 15 May 2023

Keywords

Dove prism
Mach-Zehnder interferometer
Past of the photon
Photon trajectory
Two-state vector formalism
Weak values

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10.1016/j.physleta.2023.128782

Cite this

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title = "Photons are lying about where they have been, again",

abstract = "Bhati and Arvind (2022) [5] recently argued that in a specially designed experiment the timing of photon detection events demonstrates photon presence at a location at which they are not present according to the weak value approach. The alleged contradiction is resolved by a subtle interference effect resulting in anomalous sensitivity of the signal imprinted on the postselected photons for the interaction at this location, similarly to the case of a nested Mach-Zehnder interferometer with a Dove prism (Alonso and Jordan (2015) [7]). We perform an in-depth analysis of the characterization of the presence of a pre- and postselected particle at a particular location based on information imprinted on the particle itself. The theoretical results are tested by a computer simulation of the proposed experiment.",

keywords = "Dove prism, Mach-Zehnder interferometer, Past of the photon, Photon trajectory, Two-state vector formalism, Weak values",

author = "Gregory Reznik and Carlotta Versmold and Jan Dziewior and Florian Huber and Shrobona Bagchi and Harald Weinfurter and Justin Dressel and Lev Vaidman",

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AU - Reznik, Gregory

AU - Versmold, Carlotta

AU - Dziewior, Jan

AU - Huber, Florian

AU - Bagchi, Shrobona

AU - Weinfurter, Harald

AU - Dressel, Justin

AU - Vaidman, Lev

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AB - Bhati and Arvind (2022) [5] recently argued that in a specially designed experiment the timing of photon detection events demonstrates photon presence at a location at which they are not present according to the weak value approach. The alleged contradiction is resolved by a subtle interference effect resulting in anomalous sensitivity of the signal imprinted on the postselected photons for the interaction at this location, similarly to the case of a nested Mach-Zehnder interferometer with a Dove prism (Alonso and Jordan (2015) [7]). We perform an in-depth analysis of the characterization of the presence of a pre- and postselected particle at a particular location based on information imprinted on the particle itself. The theoretical results are tested by a computer simulation of the proposed experiment.

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KW - Photon trajectory

KW - Two-state vector formalism

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Photons are lying about where they have been, again

Abstract

Keywords

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