Planar quantum squeezing in spin-1/2 systems

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Planar quantum squeezed (PQS) states, i.e. quantum states which are squeezed in two orthogonal spin components on a plane, have recently attracted attention due to their applications in atomic interferometry and quantum information [1, 2]. In this paper we present an application of the framework des...

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Autor principal:	Puentes, G.
Formato:	JOUR
Materias:	cold atoms planar squeezing quantum sensors Quantum optics Quantum theory Atomic interferometry Cold atoms Finite intervals Quantum Information Quantum nondemolition measurements Quantum parameters Quantum sensors Quantum entanglement
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_09534075_v48_n24_p_Puentes
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_09534075_v48_n24_p_Puentes
record_format	dspace
spelling	todo:paper_09534075_v48_n24_p_Puentes2023-10-03T15:51:07Z Planar quantum squeezing in spin-1/2 systems Puentes, G. cold atoms planar squeezing quantum sensors Quantum optics Quantum theory Atomic interferometry Cold atoms Finite intervals planar squeezing Quantum Information Quantum nondemolition measurements Quantum parameters Quantum sensors Quantum entanglement Planar quantum squeezed (PQS) states, i.e. quantum states which are squeezed in two orthogonal spin components on a plane, have recently attracted attention due to their applications in atomic interferometry and quantum information [1, 2]. In this paper we present an application of the framework described by Puentes et al [3] for planar quantum squeezing via quantum nondemolition (QND) measurement, for the particular case of spin-1/2 systems and nonzero covariance between orthogonal spin components. Our regime, consisting of spin-1/2 entangled planar-squeezed (EPQS) states, is of interest as it can present higher precision for quantum parameter estimation and quantum magnetometry at finite intervals. We show that entangled planar-squeezed states (EPQS) can be used to reconstruct a specific quantum parameter, such as a phase or a magnetic field, within a finite interval with higher precision than PQS states, and without iterative procedures. EPQS is of interest in cases where limited prior knowledge about the specific subinterval location for a phase is available, but it does not require knowledge of the exact phase a priori, as in the case of squeezing on a single spin component. © 2015 IOP Publishing Ltd. Fil:Puentes, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09534075_v48_n24_p_Puentes
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	cold atoms planar squeezing quantum sensors Quantum optics Quantum theory Atomic interferometry Cold atoms Finite intervals planar squeezing Quantum Information Quantum nondemolition measurements Quantum parameters Quantum sensors Quantum entanglement
spellingShingle	cold atoms planar squeezing quantum sensors Quantum optics Quantum theory Atomic interferometry Cold atoms Finite intervals planar squeezing Quantum Information Quantum nondemolition measurements Quantum parameters Quantum sensors Quantum entanglement Puentes, G. Planar quantum squeezing in spin-1/2 systems
topic_facet	cold atoms planar squeezing quantum sensors Quantum optics Quantum theory Atomic interferometry Cold atoms Finite intervals planar squeezing Quantum Information Quantum nondemolition measurements Quantum parameters Quantum sensors Quantum entanglement
description	Planar quantum squeezed (PQS) states, i.e. quantum states which are squeezed in two orthogonal spin components on a plane, have recently attracted attention due to their applications in atomic interferometry and quantum information [1, 2]. In this paper we present an application of the framework described by Puentes et al [3] for planar quantum squeezing via quantum nondemolition (QND) measurement, for the particular case of spin-1/2 systems and nonzero covariance between orthogonal spin components. Our regime, consisting of spin-1/2 entangled planar-squeezed (EPQS) states, is of interest as it can present higher precision for quantum parameter estimation and quantum magnetometry at finite intervals. We show that entangled planar-squeezed states (EPQS) can be used to reconstruct a specific quantum parameter, such as a phase or a magnetic field, within a finite interval with higher precision than PQS states, and without iterative procedures. EPQS is of interest in cases where limited prior knowledge about the specific subinterval location for a phase is available, but it does not require knowledge of the exact phase a priori, as in the case of squeezing on a single spin component. © 2015 IOP Publishing Ltd.
format	JOUR
author	Puentes, G.
author_facet	Puentes, G.
author_sort	Puentes, G.
title	Planar quantum squeezing in spin-1/2 systems
title_short	Planar quantum squeezing in spin-1/2 systems
title_full	Planar quantum squeezing in spin-1/2 systems
title_fullStr	Planar quantum squeezing in spin-1/2 systems
title_full_unstemmed	Planar quantum squeezing in spin-1/2 systems
title_sort	planar quantum squeezing in spin-1/2 systems
url	http://hdl.handle.net/20.500.12110/paper_09534075_v48_n24_p_Puentes
work_keys_str_mv	AT puentesg planarquantumsqueezinginspin12systems
_version_	1807322173280354304

Planar quantum squeezing in spin-1/2 systems

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