A proposal for a feasible quantum-optical scheme to test for the existence of superluminal signals via quantum mechanical entanglement

Demetrios A. Kalamidas

Published Oct 20, 2011• 0 citations

Abstract

Motivated by a proposal from Greenberger [Physica Scripta T76, p.57 (1998) ] for superluminal signaling, and inspired by an experiment from Zou, Wang, and Mandel [Phys. Rev. Lett. 67, p.318 (1991) ] showing interference effects within multi-particle entanglement without coincidence detection, we propose a feasible quantum-optical scheme that purports to manifest the capacity for superluminal transfer of information between distant parties

Related papers

Proposal for a feasible quantum-optical experiment to test the validity of the no-signaling theorem

Demetrios A. Kalamidas

Motivated by a proposal from [Phys. Scr.T76, 57 (1998)10.1238/Physica.Topical.076a00057PHSTBO0031-8949] for superluminal signaling and inspired by an experiment from [Phys. Rev. Lett.67, 318 (1991)10.1103/PhysRevLett.67.318PRLTAO0031-9007] showing interference effects within multiparticle entanglement without coincidence detection, we propose a feasible quantum-optical experiment that purports to manifest the capacity for superluminal transfer of information between distant parties.

arXiv:1110.4629Journal of the Optical Society of America BApr 22, 20135 citations

A proof-of-principle quantum-optical experiment challenging the import of the 'no-signaling' theorem

Demetrios A. Kalamidas

We present, and mathematically describe, a proof-of-principle quantum-optical experiment that seemingly enables superluminal signaling, contrary to the import of the 'no-signaling' theorem.

arXiv:1312.2888Dec 10, 20130 citations

Fourth-order interference in the Wigner representation for parametric down-conversion experiments

Alberto Casado, A. Fernández-Rueda, Trevor W. Marshall +2 more

In the Wigner formalism, after giving a general description of a light beam, the theory of parametric down-conversion is developed to second-order in the coupling constant. We then describe the detection process by calculating the auto-correlation and cross-correlations of the signal and idler beams. Four recent experiments are analyzed in detail: interference on a screen, Franson's experiments [Phys. Rev. Lett. 62, 2205 (1989)], Rarity and Tapster's experiments [Phys. Rev. Lett. 64, 2495 (1990)], and induced coherence without induced emission [X. Y. Zou, L. J. Wang, and L. Mandel, Phys. Rev. Lett. 67, 318 (1991)].

Physical Review AMay 1, 199738 citations

Cavity-enhanced induced coherence without induced emission

Minhaeng Cho, Peter W. Milonni

This paper presents a theoretical study of the enhancement of Zou-Wang-Mandel (ZWM) interferometry through cavity-enhanced spontaneous parametric down-conversion (SPDC) processes producing frequency-entangled biphotons. The ZWM interferometry shows the capability to generate interference effects between single signal photons via indistinguishability between the entangled idler photons. This paper extends the foundational principles of ZWM interferometry by integrating cavity-enhanced SPDCs, aiming to narrow photon bandwidths for improved coherence and photon pair generation efficiency, which is critical for applications in quantum information technologies, quantum encryption, and quantum imaging. This work explores the theoretical implication of employing singly resonant optical parametric oscillators within the ZWM interferometer to produce narrow-band single photons. By combining cavity-enhanced SPDCs with ZWM interferometry, this study fills a gap in current theoretical proposals, offering significant advancements in quantum cryptography and network applications that require reliable, narrow-band single photons.

arXiv:2408.06639Aug 13, 20240 citations

On a proposal of superluminal communication

GianCarlo Ghirardi, Raffaele Romano

Recently, various new proposals of superluminal transmission of information have been suggested in the literature. Since the proposals make systematic use of recent formal and practical improvements in quantum mechanics, the old theorems proving the impossibility of such a performance must be adapted to the new scenario. In this communication, we consider some of the most challenging proposals of this kind and we show why they cannot work.

arXiv:1205.1416Journal of Physics A Mathematical and TheoreticalMay 23, 201211 citations

Quantum Entanglement and the Nonexistence of Superluminal Signals

Michael D. Westmoreland, Benjamin W. Schumacher

This paper shows that ordinary quantum mechanics is not consistent with the superluminal transmission of classical information.

arXiv:quant-ph/9801014Jan 8, 19984 citations