Squeezed Ground States in a Spin-1 Bose-Einstein Condensate

Abstract

We generate spin squeezed ground states in an atomic spin-1 Bose-Einstein condensate tuned nearthe quantum critical point between the polar and ferromagnetic quantum phases of the interactingspin ensemble. In contrast to typical non-equilibrium methods for preparing atomic squeezed statesby quenching through a quantum phase transition, squeezed ground states are time-stationary andremain squeezed for the lifetime of the condensate. A squeezed ground state with a metrologicalimprovement up to 6-8 dB and a constant squeezing angle maintained over 2 s is demonstrated.

11 pages, 8 figures

References in corpus (21)

• Nonlinear atom interferometer surpasses classical precision limit
• Squeezing and entanglement in a Bose-Einstein condensate
• Fisher Information and entanglement of non-Gaussian spin states
• Quantum Criticality
• Fragmentation of Bose-Einstein Condensates
• Spontaneously modulated spin textures in a dipolar spinor Bose-Einstein condensate
• Detecting multiparticle entanglement of Dicke states
• Deterministic entanglement generation from driving through quantum phase transitions
• Shortcut to adiabaticity for an interacting Bose-Einstein condensate
• Optimizing number squeezing when splitting a mesoscopic condensate
• Dynamic generation of spin-squeezed states in bosonic Josephson junctions
• Simultaneous tracking of spin angle and amplitude beyond classical limits
• High Precision, Quantum-Enhanced Gravimetry with a Bose-Einstein Condensate
• Fast generation of spin-squeezed states in bosonic Josephson junctions
• Bang-bang shortcut to adiabaticity in the Dicke model as realized in a Penning trap experiment
• Optimized Double-well quantum interferometry with Gaussian squeezed-states
• Rapid Quantum Squeezing by Jumping the Harmonic Oscillator Frequency
• Dynamical properties across a quantum phase transition in the Lipkin-Meshkov-Glick model
• Shortcut to adiabaticity in spinor condensates
• Eigenstate entanglement in integrable collective spin models
• Fast generation of time-stationary spin-1 squeezed states by non-adiabatic control

Cited by in corpus (7)

• Entanglement-enhanced quantum metrology: from standard quantum limit to Heisenberg limit
• Activation of metrologically useful genuine multipartite entanglement
• Squeezing oscillations in a multimode bosonic Josephson junction
• Alternatives of entanglement depth and metrological entanglement criteria
• Precision measurement for open systems by non-hermitian linear response
• $su(d)$-squeezing and many-body entanglement geometry in finite-dimensional systems
• Hong-Ou-Mandel interference of more than 10 indistinguishable atoms