Comment on ``Nonlocality of a Single Photon Revisited''

Comment on "Quantum nonlocality for a three-particle nonmaximally entangled state without inequalities"

In a recent Brief Report, Zheng [S-B. Zheng, PRA 66, 014103 (2002)] has given a proof of nonlocality without using inequalities for three spin-1/2 particles in the nonmaximally entangled state |psi> = cosθ|+++> + i sinθ|-->. Here we show that Zheng's proof is not correct. Indeed it is the case that, for the experiment considered by Zheng, the only state that admits a nonlocality proof without inequalities is the maximally entangled state.

A comment on "Tripartite entanglement versus tripartite nonlocality in 3-qubit GHZ-class states"

The paper titled "Tripartite entanglement versus tripartite nonlocality in 3-qubit GHZ-class states", (Physical Review Letters 102, 250404 (2009)), does very important work on studying the nature of Svetlichny Inequalities (which are Bell-type inequalities) and sheds light on some important properties and relationship between Svetlichny inequality and tripartite entanglement. It derives a result for the maximum expectation value of Svetlichny operator for GGHZ and MS states. In this comment, it is put forth that there is probably a mistake in the central result derived in the paper.

Comment on `Single particle nonlocality with completely independent reference states'

We comment on the purported violation of local realism, by a single photon induced correlations between homodyne detectors, which one can find in: New J. Phys. 10, 113024 (2008), [arXiv:0807.0109]. The claim is erroneous, due to a calculational mistake. As the result is the basis of other claims in the paper, they are unsubstantiated.

Comment on ``Experimental Nonlocality Proof of Quantum Teleportation and Entanglement Swapping''

In quant-ph/0201134 Jennewein et al. report experiments demonstrating entanglement swapping under various conditions. In one instance, they claim to have exhibited Bell inequality violations by a pair of photons prior to performing any entangling operations on the pair. However, the Bell inequality violation results in this case from post-selection of the data, not from quantum non-locality.

Comment on ``Hidden quantum nonlocality revealed by local filters''

In Section 3 of his paper (N. Gisin, Phys. Lett. A 210 (1996) 151), Gisin argues that a ``careless application of generalized quantum measurements can violate Bell's inequality even for mixtures of product states.'' However, the observed violation of the CHSH inequality is not in fact due to the application of generalized quantum measurements, but rather to a misapplication of the inequality itself -- to conditional expectations in which the conditioning depends upon the measurements under consideration.

Comment on "Nonlocality claims are inconsistent with Hilbert-space quantum mechanics"

The view exists that the Bell inequality is a mere inconsistent application of classical concepts to a well-established quantum world. In the article, ``Nonlocality claims are inconsistent with Hilbert-space quantum mechanics'' [Phys. Rev. A, 101, 022117, (2020)], Robert B. Griffiths advocates for quantum theory's locality. Although R. B. Griffiths presents valuable insights in favor of quantum mechanics' local character, he argues the Bell inequality is an inconsistent application of classical physics to quantum mechanics. We explain why a correct assessment of the Bell inequality does not in…

Comment on: "The asymptotic iteration method revisited" [J. Math. Phys. 61, 033501 (2020)]

In this comment we show that the eigenvalues of a quartic anharmonic oscillator obtained recently by means of the asymptotic iteration method may not be as accurate as the authors claim them to be.

Reply to "Comment on 'Nonlocality claims are inconsistent with Hilbert-space quantum mechanics' '"

In Phys. Rev. A 101, 022117 (2020), it was argued that Bell inequalities are based on classical, not quantum, physics, and hence their violation in experiments provides no support for the claimed existence of peculiar nonlocal and superluminal influences in the real (quantum) world. This Reply to Lambare's Comment, Phys. Rev. A 104, 066201 (2021), on that paper seeks to clarify some issues related to the correct use of Hilbert space quantum mechanics for identifying the microscopic causes of later macroscopic measurement outcomes, a matter not properly addressed by Bell, who used classical hid…

Reply to "Comment on `Past of a quantum particle revisited' "

We stand by our findings in Phys. Rev A. 96, 022126 (2017). In addition to refuting the invalid objections raised by Peleg and Vaidman, we report a retrocausation problem inherent in Vaidman's definition of the past of a quantum particle.

Comment on Wave-particle duality revisited: Neither wave nor particle

In a recent article Jan Sperling, Syamsundar De, Thomas Nitsche, Johannes Tiedau, Sonja Barkhofen, Benjamin Brecht, and Christine Silberhorn discuss the wave-particle duality using an experiment to demonstrate that "neither the wave nor the particle description is sufficient to predict the utcomes of quantum-optical experiments." I would like to draw your attention to two previous papers that discuss feasible experiments in which a photon does not seem to behave either as particle or as wave and make some brief considerations on the topic.

Biological nonlocality and the mind-brain interaction problem: comments on a new empirical approach

Up to now, we have been faced with an age old fundamental dilemma posed by the mind-brain interaction problem, i.e. how is it that the mind which is subjective and immaterial, can interact with the brain which is objective and material? Analysis of recent experiments appears to indicate that quantum mechanics may have a role to play in the resolution of the mind-brain interaction problem in the form of biological entanglement and nonlocality. This analysis, when coupled with ongoing and proposed experiments, may help us to simultaneously resolve related issues such as whether mental events can…

Comment on "Past of a quantum particle revisited"

The recent criticism of Vaidman's propsal for the analysis of the past of a particle in the nested interferometer is refuted. It is shown that the definition of the past of the particle adopted by Englert et al. [Phys. Rev. A 96, 022126 (2017)] is applicable only to a tiny fraction of photons in the interferometer which indeed exhibit different behaviour. Their proof that all pre- and postselected particles behave this way, i.e. follow a continuous trajectory, does not hold, because it relies on the assumption that it is intended to prove.

对 Chiribella 等人发表于 Phys. Rev. Lett. 132 (2024) 190201, arXiv:2301.10885 一文的评论

Comment on Chiribella et al., Phys. Rev. Lett. 132 (2024) 190201, arXiv:2301.10885

本文指出 Chiribella 等人对“经典”的定义忽略非对易量子投影子，因而与希尔伯特空间量子理论不一致。

对《无爱因斯坦关系的热力学第二定律》的评论，arXiv:2405.17142

Comment on " Second Law of Thermodynamics without Einstein Relation'', arXiv:2405.17142

本文评论指出单一类温度变量不足以构建非平衡马尔可夫开放系统的热力学形式体系，并重新审视第二定律及局部温度概念，通过示例阐明其不足。

对“InAs-Al混合器件中干涉式单次宇称测量”的评论，Microsoft Quantum，Nature 638, 651-655 (2025)

Comment on "Interferometric single-shot parity measurement in InAs-Al hybrid devices", Microsoft Quantum, Nature 638, 651-655 (2025)

本文指出 Nature 2025 年所报道的 InAs-Al 器件宇称读出所依赖的拓扑能隙协议结果不一致且不可靠，并基于公开电导数据证明相关区域实际无能隙，从而质疑其核心结论。