Spin-Orbit Coupling Induced Spin Squeezing in Three-Component Bose Gases

Abstract

We observe spin squeezing in three-component Bose gases where all three hyperfine states are coupled by synthetic spin-orbit coupling. This phenomenon is a direct consequence of spin-orbit coupling, as can be seen clearly from an effective spin Hamiltonian. By solving this effective model analytically with the aid of a Holstein-Primakoff transformation for spin-1 system in the low excitation limit, we conclude that the spin-nematic squeezing, a novel category of spin squeezing existing exclusively in large spin systems, is enhanced with increasing spin-orbit intensity and effective Zeeman field, which correspond to Rabi frequency and two-photon detuning within the Raman scheme for synthetic spin-orbit coupling, respectively. These trends of dependence are in clear contrast to spin-orbit coupling induced spin squeezing in spin-1/2 systems. We also analyze the effects of harmonic trap and interaction with realistic experimental parameters numerically, and find that a strong harmonic trap favors spin-nematic squeezing. We further show spin-nematic squeezing can be interpreted as two-mode entanglement or two-spin squeezing at low excitation. Our findings can be observed in ^{87}Rb gases with existing techniques of synthetic spin-orbit coupling and spin-selectively imaging.

6 pages, 4 figures

References in corpus (28)

• Feshbach Resonances in Ultracold Gases
• A spin-orbit coupled Bose-Einstein condensate
• Nonlinear atom interferometer surpasses classical precision limit
• Spin-Orbit Coupled Degenerate Fermi Gases
• Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
• Atom chip based generation of entanglement for quantum metrology
• Quantum spin squeezing
• Squeezing and entanglement in a Bose-Einstein condensate
• The Einstein-Podolsky-Rosen paradox: from concepts to applications
• Degenerate Quantum Gases with Spin-Orbit Coupling
• Experimental criteria for steering and the Einstein-Podolsky-Rosen paradox
• Violation of local uncertainty relations as a signature of entanglement
• Spin-Nematic Squeezed Vacuum in a Quantum Gas
• Spin squeezing and entanglement
• Coherent spin mixing dynamics in a spin-1 atomic condensate
• Dicke-type phase transition in a spin-orbit coupled Bose-Einstein condensate
• Itinerant magnetism in spin-orbit coupled Bose gases
• Quantum entanglement in spinor Bose-Einstein condensates
• The Raman dressed spin-1 spin-orbit coupled quantum gas
• Tricriticalities and Quantum Phases in Spin-Orbit-Coupled Spin-$1$ Bose Gases
• Interacting spin-orbit-coupled spin-1 Bose-Einstein condensates
• Fermi Gases with Synthetic Spin-Orbit Coupling
• Spin squeezing and entanglement in spinor-1 condensates
• Phase transitions and elementary excitations in spin-1 Bose gases with Raman-induced spin-orbit coupling
• Striped Ferronematic ground states in a spin-orbit coupled $S=1$ Bose gas
• Spin entanglement, decoherence and Bohm's EPR paradox
• Pairing Superfluidity in Spin-Orbit Coupled Ultracold Fermi Gases
• Classification of Spin-Nematic Squeezing in Spin-1 Collective Atomic Systems

Cited by in corpus (5)

• Cavity QED engineering of spin dynamics and squeezing in a spinor gas
• Spin-orbit coupled soliton in a random potential
• Dynamical preparation of stripe states in spin-orbit coupled gases
• Rapid production of many-body entanglement in spin-1 atoms via cavity output photon counting
• Optimal Spin Squeezed Steady State induced by the dynamics of non-hermtian hamiltonians