Relationship between spin squeezing and single-particle coherence in two-component Bose-Einstein condensates with Josephson coupling

2008/08/31 by Guangri Jin, G. R. Jin, C. K. Law · 1 citation
Computer Science · Physics and Astronomy · #Atomic and Subatomic Physics Research #Bose–Einstein condensate #Boson #Coherence (philosophical gambling strategy) #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Coupling (piping) #Josephson effect #Physics #Quantum Information and Cryptography #Quantum electrodynamics #Quantum mechanics #Spin (aerodynamics) #Superconductivity #cond-mat.other #physics.atom-ph #quant-ph

paper · pdf · doi:10.1103/physreva.78.063620

published as Phys. Rev. A 78, 063620 (2008) · 4 figures, revtex4, new refs. are added

openalex publication_date 2008/12/29 · arxiv created 2009/01/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We investigate spin squeezing of a two-mode boson system with a Josephson coupling. An exact relation between the squeezing and the single-particle coherence at the maximal-squeezing time is discovered, which provides a more direct way to measure the squeezing by readout of the coherence in atomic interference experiments. We prove explicitly that the strongest squeezing is along the J_z axis, indicating the appearance of an atom number-squeezed state. Power laws of the strongest squeezing and the optimal coupling with particle number N are obtained based upon a wide range of numerical simulations.

Citations

• Relative phase of two Bose-Einstein condensates
• Spin squeezing and reduced quantum noise in spectroscopy
• Many-body quantum coherence and interaction blockade in Josephson-linked Bose-Einstein condensates
• Dynamics of a two-component atomic Bose Einstein condensate
• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Squeezed spin states
• Quantum state of two trapped Bose-Einstein condensates with a Josephson coupling
• Quantum Spin Dynamics of Mode-Squeezed Luttinger Liquids in Two-Component Atomic Gases
• Direct Observation of Sub-Poissonian Number Statistics in a Degenerate Bose Gas

Cited by

• Heisenberg operator approach for spin squeezing dynamics