Many-Body Nonlocality as a Resource for Quantum-Enhanced Metrology

2020/11/12 by Artur Niezgoda, Jan Chwedeńczuk, Jan Chwedenczuk · 63 citations
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Condensed matter physics #Metrology #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum computer #Quantum entanglement #Quantum mechanics #Quantum metrology #Quantum nonlocality #Quantum simulator #Resource (disambiguation) #Spins #Statistical physics #Theoretical physics #Witness #cond-mat.quant-gas #quant-ph

paper · pdf · doi:10.1103/physrevlett.126.210506

published in Physical Review Letters 126(21), 210506 (American Physical Society) · 7 pages, 3 figures

arxiv created 2020/11/12 · openalex publication_date 2021/05/28 · arxiv updated 2021/06/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/08

Abstract

We demonstrate that the many-body nonlocality witnessed by a broad family of Bell inequalities is a resource for ultraprecise metrology. We formulate a general scheme which allows one to track how the sensitivity grows with the nonlocality extending over an increasing number of particles. We illustrate our findings with some prominent examples-a collection of spins forming an Ising chain and a gas of ultracold atoms in any two-mode configuration. We show that in the vicinity of a quantum critical point the rapid increase of the sensitivity is accompanied by the emergence of the many-body Bell nonlocality. The method described in this work allows for a systematic study of highly quantum phenomena in complex systems, and also extends the understanding of the beneficial role played by fundamental nonclassical effects in implementations of quantum-enhanced protocols.

Citations

• Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
• Can Quantum-Mechanical Description of Physical Reality Be Considered Complete?
• Experimental violation of a Bell's inequality with efficient detection
• Violation of Bell's inequality under strict Einstein locality conditions
• Entanglement and quantum computation with ions in thermal motion
• Quantum-enhanced measurements: beating the standard quantum limit
• From Bell’s Theorem to Secure Quantum Key Distribution
• Bell’s Theorem for GeneralN-Qubit States
• Experimental Test of Bell's Inequalities Using Time- Varying Analyzers
• Atom Interferometry with Bose-Einstein Condensates in a Double-Well Potential
• Entanglement, Nonlinear Dynamics, and the Heisenberg Limit
• Optimal quantum estimation in spin systems at criticality
• Quantum cryptography based on Bell’s theorem
• Experimental Test of Local Hidden-Variable Theories
• Bell Inequalities for Continuous-Variable Correlations
• Experimental demonstration of quantum correlations over more than 10 km
• Secure Quantum Key Distribution Network with Bell States and Local Unitary Operations
• History of the Lenz-Ising Model
• Spacelike Separation in a Bell Test Assuming Gravitationally Induced Collapses
• An experimental test of non-local realism
• On the Einstein Podolsky Rosen paradox
• Event-Ready Bell Test Using Entangled Atoms Simultaneously Closing Detection and Locality Loopholes
• Quantum entanglement
• Bell nonlocality

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• Transfer of quantum-enhanced information through a many-body system