Preparing the spin-singlet state of a spinor gas in an optical cavity
arXiv:1810.08353 · doi:10.1103/PhysRevA.99.013819
Abstract
We propose a method to prepare the spin singlet in an ensemble of integer-spin atoms confined within a high-finesse optical cavity. Using a cavity-assisted Raman transition to produce an effective Tavis-Cummings model, we show that a high fidelity spin singlet can be produced probabilistically, although with low efficiency, heralded by the \emph{absence} of photons escaping the cavity. In a different limit, a similar configuration of laser and cavity fields can be used to engineer a model that emulates spinor collisional dynamics. Borrowing from techniques used in spinor Bose-Einstein condensates, we show that adiabatic transformation of the system Hamiltonian (via a time-dependent, effective quadratic Zeeman shift) can be used to produce a low fidelity spin singlet. Then, by following this method with the aforementioned heralding technique, we show that it is possible to prepare the singlet state with both high fidelity and good efficiency for a large ensemble.
arXiv comment8 pages, 5 figures
References in corpus (30)
- Decoherence Free Subspaces for Quantum Computation
- Spinor Bose-Einstein condensates
- Proposed realization of the Dicke-model quantum phase transition in an optical cavity QED system
- Twin matter waves for interferometry beyond the classical limit
- Spin-Nematic Squeezed Vacuum in a Quantum Gas
- Deterministic entanglement generation from driving through quantum phase transitions
- Quantum-Enhanced Sensing Based on Time Reversal of Nonlinear Dynamics
- Atomic homodyne detection of continuous variable entangled twin-atom states
- Classical and quantum communication without a shared reference frame
- Dynamical quantum phase transitions in the dissipative Lipkin-Meshkov-Glick model and proposed realization in optical cavity QED
- Beating the classical precision limit with spin-1 Dicke state of more than 10000 atoms
- 0.75 atoms improve the clock signal of 10,000 atoms
- N-particle N-level singlet states: Some properties and applications
- Spin squeezing inequalities for arbitrary spin
- Satisfying the Einstein-Podolsky-Rosen criterion with massive particles
- Quantum entanglement in spinor Bose-Einstein condensates
- Dicke model simulation via cavity-assisted Raman transitions
- Generation of Massive Entanglement Through Adiabatic Quantum Phase Transition in a spinor condensate
- Spin squeezing and entanglement for arbitrary spin
- Cavity QED engineering of spin dynamics and squeezing in a spinor gas
- Collective spin systems in dispersive optical cavity QED: Quantum phase transitions and entanglement
- Generation of macroscopic singlet states in atomic ensembles
- Dynamic stabilization of a quantum many-body spin system
- Macroscopic singlet states for gradient magnetometry
- Spin squeezing and entanglement in spinor-1 condensates
- Parametric Excitation and Squeezing in a Many-Body Spin System
- Characterizing the energy gap and demonstrating an adiabatic quench in an interacting spin system
- Feedback-cooling of an atomic spin ensemble
- Quantum control of spin-correlations in ultracold lattice gases
- Spin squeezing of high-spin, spatially extended quantum fields