Dissipation-facilitated molecules in a Fermi gas with non-Hermitian spin-orbit coupling
arXiv:1910.08890 · doi:10.1103/PhysRevA.102.043310
Abstract
We study the impact of non-Hermiticity on the molecule formation in a two-component spin-orbit-coupled Fermi gas near a wide Feshbach resonance. Under an experimentally feasible configuration where the two-photon Raman process is dissipative, the Raman-induced synthetic spin-orbit coupling acquires a complex strength. Remarkably, dissipation of the system facilitates the formation and binding of molecules, which, despite their dissipative nature and finite lifetime, exist over a wider parameter regime than in the corresponding Hermitian system. These dissipation-facilitated molecules can be probed by the inverse radio-frequency (rf) spectroscopy, provided the Raman lasers are blue detuned to the excited state. The effects of dissipation manifest in the rf spectra as shifted peaks with broadened widths, which serve as a clear experimental signature. Our results, readily observable in current cold-atom experiments, shed light on the fascinating interplay of non-Hermiticity and interaction in few- and many-body open quantum systems.
arXiv comment7 pages, 4 figures, including supplementary materials
References in corpus (38)
- Feshbach Resonances in Ultracold Gases
- A spin-orbit coupled Bose-Einstein condensate
- Quantum States and Phases in Driven Open Quantum Systems with Cold Atoms
- Nonlinear waves in -symmetric systems
- Spin-Orbit Coupled Degenerate Fermi Gases
- Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
- Observation of parity-time symmetry breaking transitions in a dissipative Floquet system of ultracold atoms
- Collective Dipole Oscillation of a Spin-Orbit Coupled Bose-Einstein Condensate
- Strong dissipation inhibits losses and induces correlations in cold molecular gases
- Dynamical Phase Transitions and Instabilities in Open Atomic Many-Body Systems
- Controlling the dynamics of an open many-body quantum system with localized dissipation
- Observation of Zitterbewegung in a spin-orbit coupled Bose-Einstein condensate
- Observation of the Mott Insulator to Superfluid Crossover of a Driven-Dissipative Bose-Hubbard System
- Model of a PT symmetric Bose-Einstein condensate in a delta-functions double well
- Theory of Non-Hermitian Fermionic Superfluidity with a Complex-Valued Interaction
- Non-equilibrium steady-states in a driven-dissipative superfluid
- A Raman-induced Feshbach resonance in an effectively single-component Fermi gas
- Non-Hermitian Linear Response Theory
- Anomalous momentum diffusion in a dissipative many-body system
- Quantum critical behavior influenced by measurement backaction in ultracold gases
- Coherent perfect absorption of nonlinear matter waves
- Dissipation-induced coherent structures in Bose-Einstein condensates
- Dissipative Bose-Hubbard system with intrinsic two-body loss
- Dynamical sign reversal of magnetic correlations in dissipative Hubbard models
- Engineering tunable local loss in a synthetic lattice of momentum states
- Theory of superconductivity with non-Hermitian and parity-time reversal symmetric cooper pairing symmetry
- Macroscopic Zeno effect and stationary flows in nonlinear waveguides with localized dissipation
- Mixed partial-wave scattering with spin-orbit coupling and validity of pseudo-potentials
- High order exceptional points in ultracold Bose gases
- Radio-frequency spectroscopy of a strongly interacting spin-orbit coupled Fermi gas
- Physics of ultracold Fermi gases revealed by spectroscopies
- Spectral singularities in PT-symmetric Bose-Einstein condensates
- Scattering and effective interactions of ultracold atoms with spin-orbit coupling
- Interacting non-Hermitian ultracold atoms in a harmonic trap: Two-body exact solution and high-order exceptional point
- Interaction effects on -symmetry breaking transition in atomic gases
- Radio-frequency spectroscopy of weakly bound molecules in spin-orbit coupled atomic Fermi gases
- Nonlinear currents in a ring-shaped waveguide with balanced gain and dissipation
- Formation of Feshbach molecules in the presence of artificial spin-orbit coupling and Zeeman fields
Cited by in corpus (12)
- Non-Hermitian Squeezed Polarons
- Quantum Zeno effects across a parity-time symmetry breaking transition in atomic momentum space
- Probing two-body exceptional points in open dissipative systems
- Effective scattering and Efimov physics in the presence of two-body dissipation
- Quantum fluctuations on top of a -symmetric Bose-Einstein Condensate
- Skin Effect Induced Anomalous Dynamics from Charge-Fluctuating Initial States
- Emergent -symmetry breaking of collective modes with topological critical phenomena
- Dissipative two-dimensional Raman lattice
- Topology and its detection in a dissipative Aharonov-Bohm chain
- Impurity in a Fermi gas under non-Hermitian spin-orbit coupling
- Local Non-Hermitian Hamiltonian Formalism for Dissipative Fermionic Systems and Loss-Induced Population Increase in Fermi Superfluids
- A new Berry phase term in parity-time symmetric non-Hermitian spin-1/2 quantum systems