On 'Schrödinger's cat' fringes

V.L. Gorshenin^a, b, B.N. Nougmanov^a, b, F.Ya. Khalili^†^b
^aMoscow Institute of Physics and Technology (National Research University), Institutskii per. 9, Dolgoprudny, Moscow Region, 141701, Russian Federation
^bInternational Center for Quantum Optics and Quantum Technologies (the Russian Quantum Center), Skolkovo Innovation Center, Bolshoi Boulevard, Building 30, Block 1, 3rd floor, sectors G3, G7, Moscow, Moscow Region, 121205, Russian Federation

Non-Gaussian quantum states whose Wigner functions can take negative values are important both for fundamental tests of quantum physics and for the quantum information technologies that have been under active development recently. A typical example of a non-Gaussian state is the so-called Schrödinger's cat state. Its very interesting feature is that its 'classical' part (two Gaussian maxima) is geometrically separated from the 'nonclassical' part (interference fringes). In this paper, several methodological issues related to these fringes are considered.

Keywords: Schrödinger's cat, Wigner functions, non-Gaussian states
PACS: 03.65.Ta, 03.65.Ud, 42.50.−p (all)
DOI: 10.3367/UFNe.2024.05.039686
URL: https://ufn.ru/en/articles/2024/9/i/
Web of Science

001343554500007
Scopus

2-s2.0-85208397350
ADS NASA

2024PhyU...67..938G
Citation: Gorshenin V L, Nougmanov B N, Khalili F Ya "On 'Schrödinger's cat' fringes" Phys. Usp. 67 938–942 (2024)

BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks

Received: 22nd, February 2024, revised: 25th, April 2024, accepted: 28th, May 2024

Оригинал: Горшенин В Л, Нугманов Б Н, Халили Ф Я «О полосах "кота Шрёдингера"» УФН 194 994–998 (2024); DOI: 10.3367/UFNr.2024.05.039686

References (19) Similar articles (20) ↓

V.P. Demutskii, R.V. Polovin “Conceptual problems in quantum mechanics” Sov. Phys. Usp. 35 (10) 857–896 (1992)
A.M. Zheltikov “The critique of quantum mind: measurement, consciousness, delayed choice, and lost coherence” Phys. Usp. 61 1016–1025 (2018)
B.B. Kadomtsev “Irreversibility in quantum mechanics” Phys. Usp. 46 1183–1201 (2003)
V.V. Mityugov “The tree of paradox” Phys. Usp. 36 (8) 744–753 (1993)
S.P. Vyatchanin, F.Ya. Khalili “’Interaction-free’ measurement: possibilities and limitations” Phys. Usp. 47 705–716 (2004)
F.Ya. Khalili “Zero-point oscillations, zero-point fluctuations, and fluctuations of zero-point oscillations” Phys. Usp. 46 293–307 (2003)
A.I. Akhiezer, R.V. Polovin “Why IT IS impossible to introduce hidden parameters into quantum mechanics” Sov. Phys. Usp. 15 500–512 (1973)
A.V. Belinsky, A.A. Klevtsov “Nonlocal classical "realism" and quantum superposition as the nonexistence of definite pre-measurement values of physical quantities” Phys. Usp. 61 313–319 (2018)
A.V. Belinskii, A.S. Chirkin “Bernstein’s paradox of entangled quantum states” Phys. Usp. 56 1126–1131 (2013)
B.B. Kadomtsev “Classical and quantum irreversibility” Phys. Usp. 38 923–929 (1995)
A.V. Belinsky “Wigner's friend paradox: does objective reality not exist?” Phys. Usp. 63 1256–1263 (2020)
A.V. Belinsky “On David Bohm's 'pilot-wave' concept” Phys. Usp. 62 1268–1278 (2019)
M.B. Mensky “Measurability of quantum fields and the energy—time uncertainty relation” Phys. Usp. 54 519–528 (2011)
V.B. Braginskii “Adolescent years of experimental physics” Phys. Usp. 46 81–87 (2003)
L.A. Rivlin “Photons in a waveguide (some thought experiments)” Phys. Usp. 40 291–303 (1997)
V.I. Bodnarchuk, L.S. Davtyan, D.A. Korneev “Geometrical phase effects in neutron optics” Phys. Usp. 39 169–177 (1996)
A.S. Tarnovskii “A new representation of quantum mechanics” Sov. Phys. Usp. 33 (10) 862–864 (1990)
D.N. Klyshko “The Einstein-Podolsky-Rosen paradox for energy-time variables” Sov. Phys. Usp. 32 555–563 (1989)
S.V. Vladimirov, Yu.O. Tyshetskiy “On description of a collisionless quantum plasma” Phys. Usp. 54 1243–1256 (2011)
S.M. Stishov “Quantum effects in a system of Boltzmann hard spheres” Phys. Usp. 62 617–622 (2019)

The list is formed automatically.