Bose–Einstein condensate soliton qubit states for metrological applications

Abstract We propose a novel platform for quantum metrology based on qubit states of two Bose–Einstein condensate solitons, optically manipulated, trapped in a double-well potential, and coupled through nonlinear Josephson effect. We describe steady-state solutions in different scenarios and perform...

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Autores principales:	The Vinh Ngo, Dmitriy V. Tsarev, Ray-Kuang Lee, Alexander P. Alodjants
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/71772e27497f4b0b96813322e7f5dfcc
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spelling	oai:doaj.org-article:71772e27497f4b0b96813322e7f5dfcc2021-12-02T17:18:22ZBose–Einstein condensate soliton qubit states for metrological applications10.1038/s41598-021-97971-42045-2322https://doaj.org/article/71772e27497f4b0b96813322e7f5dfcc2021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97971-4https://doaj.org/toc/2045-2322Abstract We propose a novel platform for quantum metrology based on qubit states of two Bose–Einstein condensate solitons, optically manipulated, trapped in a double-well potential, and coupled through nonlinear Josephson effect. We describe steady-state solutions in different scenarios and perform a phase space analysis in the terms of population imbalance—phase difference variables to demonstrate macroscopic quantum self-trapping regimes. Schrödinger-cat states, maximally path-entangled (N00N) states, and macroscopic soliton qubits are predicted and exploited to distinguish the obtained macroscopic states in the framework of binary (non-orthogonal) state discrimination problem. For an arbitrary frequency estimation we have revealed these macroscopic soliton states have a scaling up to the Heisenberg and super-Heisenberg (SH) limits within linear and nonlinear metrology procedures, respectively. The examples and numerical evaluations illustrate experimental feasibility of estimation with SH accuracy of angular frequency between the ground and first excited macroscopic states of the condensate in the presence of moderate losses, which opens new perspectives for current frequency standard technologies.The Vinh NgoDmitriy V. TsarevRay-Kuang LeeAlexander P. AlodjantsNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-19 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q The Vinh Ngo Dmitriy V. Tsarev Ray-Kuang Lee Alexander P. Alodjants Bose–Einstein condensate soliton qubit states for metrological applications
description	Abstract We propose a novel platform for quantum metrology based on qubit states of two Bose–Einstein condensate solitons, optically manipulated, trapped in a double-well potential, and coupled through nonlinear Josephson effect. We describe steady-state solutions in different scenarios and perform a phase space analysis in the terms of population imbalance—phase difference variables to demonstrate macroscopic quantum self-trapping regimes. Schrödinger-cat states, maximally path-entangled (N00N) states, and macroscopic soliton qubits are predicted and exploited to distinguish the obtained macroscopic states in the framework of binary (non-orthogonal) state discrimination problem. For an arbitrary frequency estimation we have revealed these macroscopic soliton states have a scaling up to the Heisenberg and super-Heisenberg (SH) limits within linear and nonlinear metrology procedures, respectively. The examples and numerical evaluations illustrate experimental feasibility of estimation with SH accuracy of angular frequency between the ground and first excited macroscopic states of the condensate in the presence of moderate losses, which opens new perspectives for current frequency standard technologies.
format	article
author	The Vinh Ngo Dmitriy V. Tsarev Ray-Kuang Lee Alexander P. Alodjants
author_facet	The Vinh Ngo Dmitriy V. Tsarev Ray-Kuang Lee Alexander P. Alodjants
author_sort	The Vinh Ngo
title	Bose–Einstein condensate soliton qubit states for metrological applications
title_short	Bose–Einstein condensate soliton qubit states for metrological applications
title_full	Bose–Einstein condensate soliton qubit states for metrological applications
title_fullStr	Bose–Einstein condensate soliton qubit states for metrological applications
title_full_unstemmed	Bose–Einstein condensate soliton qubit states for metrological applications
title_sort	bose–einstein condensate soliton qubit states for metrological applications
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/71772e27497f4b0b96813322e7f5dfcc
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Bose–Einstein condensate soliton qubit states for metrological applications

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