Coherent and dephasing spectroscopy for single-impurity probing of an ultracold bath
arXiv:2105.03331 · doi:10.1103/PhysRevLett.129.120404
Abstract
We report Ramsey spectroscopy on the clock states of individual Cs impurities immersed in an ultracold Rb bath. We record both the interaction-driven phase evolution and the decay of fringe contrast of the Ramsey interference signal to obtain information about bath density or temperature nondestructively. The Ramsey fringe is modified by a differential shift of the collisional energy when the two Cs states superposed interact with the Rb bath. This differential shift is directly affected by the mean gas density and the details of the Rb-Cs interspecies scattering length, affecting the phase evolution and the contrast of the Ramsey signal. Additionally, we enhance the temperature dependence of the phase shift preparing the system close to a low-magnetic-field Feshbach resonance where the -wave scattering length is significantly affected by the collisional (kinetic) energy. Analyzing coherent phase evolution and decay of the Ramsey fringe contrast, we probe the Rb cloud's density and temperature. Our results point at using individual impurity atoms as nondestructive quantum probes in complex quantum systems.
arXiv comment9 pages, 11 figures
References in corpus (42)
- Observation of Attractive and Repulsive Polarons in a Bose-Einstein Condensate
- Ultrafast many-body interferometry of impurities coupled to a Fermi sea
- Individual quantum probes for optimal thermometry
- Time dependent impurity in ultracold fermions: orthogonality catastrophe and beyond
- Bose polarons near quantum criticality
- Thermometry in the quantum regime: Recent theoretical progress
- Universal many-body response of heavy impurities coupled to a Fermi sea
- Analysis of dephasing mechanisms in a standing wave dipole trap
- Self-consistent model of ultracold atomic collisions and Feshbach resonances in tight harmonic traps
- Quantum many-body theory for electron spin decoherence in nanoscale nuclear spin baths
- Non-equilibrium quantum dynamics and formation of the Bose polaron
- Orthogonality catastrophe as a consequence of qubit embedding in an ultra-cold Fermi gas
- In situ thermometry of a cold Fermi gas via dephasing impurities
- Using polarons for sub-nK quantum non-demolition thermometry in a Bose-Einstein condensate
- Collisional Stability of 40K Immersed in a Strongly Interacting Fermi Gas of 6Li
- Bose polarons at finite temperature and strong coupling
- Single atoms in a standing-wave dipole trap
- Single-atom quantum probes for ultracold gases using nonequilibrium spin dynamics
- Thermometry and cooling of a Bose-Einstein condensate to 0.02 times the critical temperature
- Dynamics, dephasing and clustering of impurity atoms in Bose-Einstein condensates
- Quantum spin dynamics of individual neutral impurities coupled to a Bose-Einstein condensate
- Observation of spin-spin fermion-mediated interactions between ultracold bosons
- Thermometry of ultracold atoms via non-equilibrium work distributions
- Probing the spectral density of a dissipative qubit via quantum synchronization
- A Single Atom Thermometer for Ultracold Gases
- Precision Measurement of the 87-Rb Tune-Out Wavelength in the Hyperfine Ground State F=1 at 790 nm
- Probability distribution for the relative velocity of colliding particles in a relativistic classical gas
- Relativistic in the calculation of relics abundances: a closer look
- Variational approach for impurity dynamics at finite temperature
- Quantum probing beyond pure dephasing
- Observation of individual tracer atoms in an ultracold dilute gas
- Non-destructive selective probing of phononic excitations in a cold Bose gas using impurities
- Dynamical variational approach to Bose polarons at finite temperatures
- Thermometry of a deeply degenerate Fermi gas with a Bose-Einstein condensate
- Nondestructive Probing of Means, Variances, and Correlations of Ultracold-Atomic-System Densities via Qubit Impurities
- Single-atom aided probe of the decoherence of a Bose-Einstein condensate
- Momentum-Resolved and Correlations Spectroscopy Using Quantum Probes
- Tailored single-atom collisions at ultra-low energies
- Quantum entanglement from classical trajectories
- Controlled doping of a bosonic quantum gas with single neutral atoms
- Quantum probe spectroscopy for cold atomic systems
- Nonequilibrium thermodynamics and optimal cooling of a dilute atomic gas
Cited by in corpus (21)
- Fundamental limits in Bayesian thermometry and attainability via adaptive strategies
- Roadmap on Quantum Thermodynamics
- Quantum sensing of temperature close to absolute zero in a Bose-Einstein condensate
- Thermodynamics of decoherence
- Optimal Thermometers with Spin Networks
- Invasiveness of non-equilibrium quantum thermometry
- Harnessing coherence generation for precision single- and two-qubit quantum thermometry
- Strongly coupled fermionic probe for nonequilibrium thermometry
- Thermometry by correlated dephasing of impurities in a 1D Fermi gas
- Probe thermometry with continuous measurements
- Quantum master equation from the eigenstate thermalization hypothesis
- Two-dimensional polaron spectroscopy of Fermi superfluids
- Quantum thermometry for ultralow temperatures using probe and ancilla qubit chains
- Measuring the environment of a Cs qubit with dynamical decoupling sequences
- Temperature-heat uncertainty relation in nonequilibrium quantum thermometry
- Single-qubit probes for temperature estimation in the presence of collective baths
- Topologically protected Bell-cat states in a simple spin model
- Counterflow of lattice polarons in harmonically confined optical lattices
- Correlated decoherence and thermometry with mobile impurities in a 1D Fermi gas
- Universal energy fluctuations in inelastic scattering processes
- Probing Bardeen-Cooper-Schrieffer pairing and quasiparticle formation in ultracold gases by Rydberg atom spectroscopy