Multidimensional Spectroscopy of Time-Dependent Impurities in Ultracold Fermions
arXiv:2207.10501 · doi:10.1103/PhysRevA.107.013305
Abstract
We investigate the system of a heavy impurity immersed in a degenerated Fermi gas, where the impurity's internal degree of freedom (pseudospin) is manipulated by a series of radiofrequency (RF) pulses at several different times. Applying the functional determinant approach, we carry out an essentially exact calculation of the Ramsey-interference-type responses to the RF pulses. These responses are universal functions of the multiple time intervals between the pulses for all time and can be regarded as multidimensional (MD) spectroscopy of the system in the time domain. A Fourier transformation of the time intervals gives the MD spectroscopy in the frequency domain, providing insightful information on the many-body correlation and relaxation via the cross-peaks, e.g., the off-diagonal peaks in a two-dimensional spectrum. These features are inaccessible for the conventional, one-dimensional absorption spectrum. Our scheme provides a new method to investigate many-body nonequilibrium physics beyond the linear response regime with the accessible tools in cold atoms.
References in corpus (22)
- Many-Body Physics with Ultracold Gases
- Observation of Fermi Polarons in a Tunable Fermi Liquid of Ultracold Atoms
- Attractive and repulsive Fermi polarons in two dimensions
- Repulsive Fermi polarons in a resonant mixture of ultracold Li atoms
- Many-Body Theory of Trion Absorption Features in Two-Dimensional Semiconductors
- Normal state of a polarized Fermi gas at unitarity
- Time dependent impurity in ultracold fermions: orthogonality catastrophe and beyond
- Variational study of polarons in Bose-Einstein condensates
- Spectroscopic insensitivity to cold collisions in a two-state mixture of fermions
- Full counting statistics for noninteracting fermions: Exact results and the Levitov-Lesovik formula
- Interferometric approach to measuring band topology in 2D optical lattices
- Trimers, molecules and polarons in imbalanced atomic Fermi gases
- Electron-exciton interactions in the exciton-polaron problem
- Exciton-polaron interactions in monolayer WS
- Dynamical quantum Cherenkov transition of fast impurities in quantum liquids
- Rydberg Electrons in a Bose-Einstein Condensate
- Diagrammatic Monte Carlo study of mass-imbalanced Fermi-polaron system
- Heavy polarons in ultracold atomic Fermi superfluids at the BEC-BCS crossover: formalism and applications
- Exact quasiparticle properties of a heavy polaron in BCS Fermi superfluids
- Renormalization group study of Bose polarons
- Crossover polarons in a strongly interacting Fermi superfluid
- Finite-range effects in the unitary Fermi polaron
Cited by in corpus (6)
- Thermometry by correlated dephasing of impurities in a 1D Fermi gas
- Two-dimensional coherent spectroscopy of trion-polaritons and exciton-polaritons in atomically thin transition metal dichalcogenides
- Two-dimensional polaron spectroscopy of Fermi superfluids
- Extracting Nonlinear Dynamical Response Functions from Time Evolution
- Correlated decoherence and thermometry with mobile impurities in a 1D Fermi gas
- Microscopic many-body theory of two-dimensional coherent spectroscopy of excitons and trions in atomically thin transition metal dichalcogenides