Spontanous spin squezing in a rubidium BEC
arXiv:1804.07536 · doi:10.1088/1367-2630/aacf1e
Abstract
We describe an experiment where spin squeezing occurs spontaneously within a standard Ramsey sequence driving a two-component Bose-Einstein condensate (BEC) of 87Rb atoms trapped in an elongated magnetic trap. Multiparticle entanglement is generated by state-dependent collisional interactions, despite the near-identical scattering lengths of the spin states in 87Rb. In our proof-of-principle experiment, we observe a metrological spin squeezing that reaches 1.3+/-0.4dB for 5000 atoms, with a contrast of 90+/-1%. The method may be applied to realize spin-squeezed BEC sources for atom interferometry without the need for cavities, state-dependent potentials or Feshbach resonances.
References in corpus (32)
- The dynamics of component separation in a binary mixture of Bose-Einstein condensates
- Spinor Bose-Einstein condensates
- Many-particle entanglement with Bose--Einstein condensates
- Nonlinear atom interferometer surpasses classical precision limit
- Atom chip based generation of entanglement for quantum metrology
- Squeezing and entanglement in a Bose-Einstein condensate
- Shortcuts to adiabaticity
- Implementation of Cavity Squeezing of a Collective Atomic Spin
- Twin matter waves for interferometry beyond the classical limit
- Mesoscopic atomic entanglement for precision measurements beyond the standard quantum limit
- The truncated Wigner method for Bose condensed gases: limits of validity and applications
- States of an Ensemble of Two-Level Atoms with Reduced Quantum Uncertainty
- Magnetic sensitivity beyond the projection noise limit by spin squeezing
- Coherence in Microchip Traps
- Effect of cold collisions on spin coherence and resonance shifts in a magnetically trapped ultra-cold gas
- Bell Correlations in a Bose-Einstein Condensate
- Strong saturation absorption imaging of dense clouds of ultracold atoms
- Quantum metrology with a scanning probe atom interferometer
- Non-Equilibrium Dynamics and Superfluid Ring Excitations in Binary Bose-Einstein Condensates
- Controlling phase separation of binary Bose-Einstein condensates via mixed-spin-channel Feshbach resonance
- Spin self-rephasing and very long coherence times in a trapped atomic ensemble
- Precision measurements of s-wave scattering lengths in a two-component Bose-Einstein condensate
- Spin squeezing, entanglement and quantum metrology with Bose-Einstein condensates
- A quantum sensor: simultaneous precision gravimetry and magnetic gradiometry with a Bose-Einstein condensate
- Improved detection of small atom numbers through image processing
- Enhanced and reduced atom number fluctuations in a BEC splitter
- Long-lived periodic revivals of coherence in an interacting Bose-Einstein condensate
- Stability of a trapped atom clock on a chip
- Optically trapped atom interferometry using the clock transition of large Rb-87 Bose-Einstein condensates
- Quantum noise in three-dimensional BEC interferometry
- Self-induced Spatial Dynamics to Enhance Spin-Squeezing via One-Axis Twisting in a Two-Component Bose-Einstein Condensate
- Nonlinear dressed states at the miscibility-immiscibility threshold
Cited by in corpus (12)
- Using an atom interferometer to infer gravitational entanglement generation
- Squeezed Ground States in a Spin-1 Bose-Einstein Condensate
- Mesoscopic two-mode entangled and steerable states of 40,000 atoms in a Bose-Einstein condensate interferometer
- Quantum Atom Optics: Theory and Applications to Quantum Technology
- Generating Macroscopic Superpositions with Interacting Bose-Einstein Condensates: Multi-Mode Speed-Ups and Speed Limits
- Fundamental limit of phase coherence in two-component Bose-Einstein condensates
- Fast generation of time-stationary spin-1 squeezed states by non-adiabatic control
- A hybrid method of generating spin-squeezed states for quantum-enhanced atom interferometry
- Optimal Spin Squeezed Steady State induced by the dynamics of non-hermtian hamiltonians
- Spin Rotations in a Bose-Einstein Condensate Driven by Counterflow and Spin-independent Interactions
- Twist-and-store entanglement in bimodal and spin-1 Bose-Einstein condensates
- Generation of squeezed optical states via stored classical pulses in a Bose gas