Experimental violation of the Leggett-Garg inequality using the polarization of classical light

Zhang, Wenlei; Saripalli, Ravi K.; Leamer, Jacob M.; Glasser, Ryan T.; Bondar, Denys I.

doi:10.1103/physreva.104.043711

Cited by 4 publications

(1 citation statement)

References 23 publications

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“…LGI has been studied in the context of non-hermitian PT symmetric dynamics [65,66], markovian quantum dynamics [67,68]. Tests of LGI have been carried out using photons, electrons, or nuclear spins for which coherence length is limited [62,69].…”

Section: Introductionmentioning

confidence: 99%

Investigating Leggett-Garg inequality in neutrino oscillations -- role of decoherence and decay

Shafaq¹,

Kushwaha²,

Mehta³

2021

Preprint

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Neutrinos, due to their weakly interacting nature, provide us with a unique opportunity to test foundations of quantum mechanics over macroscopic distances. There has been considerable theoretical and experimental interest in examining the extent of violation of Leggett-Garg inequalities (LGI) in the context of neutrino flavour oscillations. While it is established that neutrino oscillations occur due to mass and mixing among the three generations of neutrinos, sub-dominant effects due to physics beyond the Standard Model (SM) are not yet ruled out. As we are entering the precision era in neutrino physics, it is possible that some of these effects may leave an imprint on data. Thus, it is worthwhile to investigate different physics scenarios beyond the SM and study their impact on oscillation probabilities. In the present work, we invoke damping effects (including decoherence and decay) on oscillation probabilities and study their implications on the LGI.

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Section: Introductionmentioning

confidence: 99%

Investigating Leggett-Garg inequality in neutrino oscillations -- role of decoherence and decay

Shafaq¹,

Kushwaha²,

Mehta³

2021

Preprint

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Tests of macrorealism in meson oscillation physics

Blasone,

Illuminati,

Petruzziello

et al. 2024

Phys. Rev. A

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Classical model of quantum interferometry tests of macrorealism

Cour¹

2022

AVS Quantum Science

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Macrorealism is a characteristic feature of many, but not all, classical systems. It is known, for example, that classical light can violate a Leggett–Garg inequality and, hence, reject a macrorealist interpretation. A recent experiment has used entangled light and negative measurements to demonstrate a loophole-free test of macrorealism [Joarder et al., PRX Quantum 3, 010307 (2022)]. This paper shows that such an experiment, while soundly rejecting macrorealism, may nevertheless be open to a classical interpretation. This is done by offering an explicit classical model of heralded photon detection in an optical interferometer with beam blockers. A numerical analysis of the model shows good agreement with experimental observations and consistency with both local realism and a rejection of macrorealism.

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Experimental violation of the Leggett-Garg inequality using the polarization of classical light

Cited by 4 publications

References 23 publications

Investigating Leggett-Garg inequality in neutrino oscillations -- role of decoherence and decay

Investigating Leggett-Garg inequality in neutrino oscillations -- role of decoherence and decay

Tests of macrorealism in meson oscillation physics

Classical model of quantum interferometry tests of macrorealism

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