Entanglement-Enhanced Phase Estimation without Prior Phase Information

We study the generation of planar quantum squeezed (PQS) states by quantum nondemolition (QND) measurement of an ensemble of Rb87 atoms with a Poisson distributed atom number. Precise calibration of the QND measurement allows us to infer the conditional covariance matrix describing the Fy and Fz com...

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Detalles Bibliográficos
Autores principales:	Colangelo, G., Martin Ciurana, F., Puentes, G., Mitchell, M.W., Sewell, R.J.
Formato:	JOUR
Materias:	Atoms Covariance matrix Phase estimation Phase information Prior knowledge QND measurements Quantum nondemolition measurements Single components Spin squeezing inequalities Squeezed state Quantum theory
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00319007_v118_n23_p_Colangelo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00319007_v118_n23_p_Colangelo
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spelling	todo:paper_00319007_v118_n23_p_Colangelo2023-10-03T14:42:45Z Entanglement-Enhanced Phase Estimation without Prior Phase Information Colangelo, G. Martin Ciurana, F. Puentes, G. Mitchell, M.W. Sewell, R.J. Atoms Covariance matrix Phase estimation Phase information Prior knowledge QND measurements Quantum nondemolition measurements Single components Spin squeezing inequalities Squeezed state Quantum theory We study the generation of planar quantum squeezed (PQS) states by quantum nondemolition (QND) measurement of an ensemble of Rb87 atoms with a Poisson distributed atom number. Precise calibration of the QND measurement allows us to infer the conditional covariance matrix describing the Fy and Fz components of the PQS states, revealing the dual squeezing characteristic of PQS states. PQS states have been proposed for single-shot phase estimation without prior knowledge of the likely values of the phase. We show that for an arbitrary phase, the generated PQS states can give a metrological advantage of at least 3.1 dB relative to classical states. The PQS state also beats, for most phase angles, single-component-squeezed states generated by QND measurement with the same resources and atom number statistics. Using spin squeezing inequalities, we show that spin-spin entanglement is responsible for the metrological advantage. © 2017 American Physical Society. 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_00319007_v118_n23_p_Colangelo
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Atoms Covariance matrix Phase estimation Phase information Prior knowledge QND measurements Quantum nondemolition measurements Single components Spin squeezing inequalities Squeezed state Quantum theory
spellingShingle	Atoms Covariance matrix Phase estimation Phase information Prior knowledge QND measurements Quantum nondemolition measurements Single components Spin squeezing inequalities Squeezed state Quantum theory Colangelo, G. Martin Ciurana, F. Puentes, G. Mitchell, M.W. Sewell, R.J. Entanglement-Enhanced Phase Estimation without Prior Phase Information
topic_facet	Atoms Covariance matrix Phase estimation Phase information Prior knowledge QND measurements Quantum nondemolition measurements Single components Spin squeezing inequalities Squeezed state Quantum theory
description	We study the generation of planar quantum squeezed (PQS) states by quantum nondemolition (QND) measurement of an ensemble of Rb87 atoms with a Poisson distributed atom number. Precise calibration of the QND measurement allows us to infer the conditional covariance matrix describing the Fy and Fz components of the PQS states, revealing the dual squeezing characteristic of PQS states. PQS states have been proposed for single-shot phase estimation without prior knowledge of the likely values of the phase. We show that for an arbitrary phase, the generated PQS states can give a metrological advantage of at least 3.1 dB relative to classical states. The PQS state also beats, for most phase angles, single-component-squeezed states generated by QND measurement with the same resources and atom number statistics. Using spin squeezing inequalities, we show that spin-spin entanglement is responsible for the metrological advantage. © 2017 American Physical Society.
format	JOUR
author	Colangelo, G. Martin Ciurana, F. Puentes, G. Mitchell, M.W. Sewell, R.J.
author_facet	Colangelo, G. Martin Ciurana, F. Puentes, G. Mitchell, M.W. Sewell, R.J.
author_sort	Colangelo, G.
title	Entanglement-Enhanced Phase Estimation without Prior Phase Information
title_short	Entanglement-Enhanced Phase Estimation without Prior Phase Information
title_full	Entanglement-Enhanced Phase Estimation without Prior Phase Information
title_fullStr	Entanglement-Enhanced Phase Estimation without Prior Phase Information
title_full_unstemmed	Entanglement-Enhanced Phase Estimation without Prior Phase Information
title_sort	entanglement-enhanced phase estimation without prior phase information
url	http://hdl.handle.net/20.500.12110/paper_00319007_v118_n23_p_Colangelo
work_keys_str_mv	AT colangelog entanglementenhancedphaseestimationwithoutpriorphaseinformation AT martinciuranaf entanglementenhancedphaseestimationwithoutpriorphaseinformation AT puentesg entanglementenhancedphaseestimationwithoutpriorphaseinformation AT mitchellmw entanglementenhancedphaseestimationwithoutpriorphaseinformation AT sewellrj entanglementenhancedphaseestimationwithoutpriorphaseinformation
_version_	1807318737374674944

Entanglement-Enhanced Phase Estimation without Prior Phase Information

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