How squeezed states both maximize and minimize the same notion of quantumness

Par Conseil national de recherches du Canada

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DOI	Trouver le DOI : https://doi.org/10.1103/PhysRevA.104.032425
Auteur	Rechercher : Goldberg, Aaron Z.¹Identifiant ORCID : https://orcid.org/0000-0002-3301-7672; Rechercher : Heshami, Khabat¹Identifiant ORCID : https://orcid.org/0000-0003-3864-1930
Affiliation	Conseil national de recherches du Canada. Technologies de sécurité et de rupture
Format	Texte, Article
Sujet	entanglement production; optical interferometry; quantum correlations in quantum information; quantum entanglement; squeezing of quantum noise
Résumé	Beam splitters are routinely used for generating entanglement between modes in the optical and microwave domains, requiring input states that are not convex combinations of coherent states. This leads to the ability to generate entanglement at a beam splitter as a notion of quantumness. A similar, yet distinct, notion of quantumness is the amount of entanglement generated by two-mode squeezers (i.e., four-wave mixers). We show that squeezed-vacuum states, paradoxically, both minimize and maximize these notions of quantumness, with the crucial resolution of the paradox hinging upon the relative phases between the input states and the devices. Our notion of quantumness is intrinsically related to eigenvalue equations involving creation and annihilation operators, governed by a set of inequalities that leads to generalized cat and squeezed-vacuum states.
Date de publication	2021-09-28
Maison d’édition	American Physical Society
Dans	Physical Review A 104, nº 3, 032425 (28 septembre 2021) : 1–12.
Langue	anglais
Publications évaluées par des pairs	Oui
Exporter la notice	Exporter en format RIS
Signaler une correction	Signaler une correction (s'ouvre dans un nouvel onglet)
Identificateur de l’enregistrement	8988444b-6b0e-4751-847b-5360f2d36b64
Enregistrement créé	2022-02-18
Enregistrement modifié	2022-02-23

Date de modification :: 2024-07-17