Spectral filtering induced by non-hermitian evolution with balanced gain and loss: Enhancing quantum chaos
The dynamical signatures of quantum chaos in an isolated system are captured by the
spectral form factor, which exhibits as a function of time a dip, a ramp, and a plateau, with the …
spectral form factor, which exhibits as a function of time a dip, a ramp, and a plateau, with the …
In Situ Thermometry of a Cold Fermi Gas via Dephasing Impurities
The precise measurement of low temperatures is a challenging, important, and fundamental
task for quantum science. In particular, in situ thermometry is highly desirable for cold atomic …
task for quantum science. In particular, in situ thermometry is highly desirable for cold atomic …
Thermometry of strongly correlated fermionic quantum systems using impurity probes
We study quantum-impurity models as a platform for quantum thermometry. A single
quantum spin-1 2 impurity is coupled to an explicit, structured, fermionic thermal sample …
quantum spin-1 2 impurity is coupled to an explicit, structured, fermionic thermal sample …
Single-atom quantum probes for ultracold gases boosted by nonequilibrium spin dynamics
Quantum probes are atomic sized devices map** information of their environment to
quantum-mechanical states. By improving measurements and at the same time minimizing …
quantum-mechanical states. By improving measurements and at the same time minimizing …
Speed-ups to isothermality: Enhanced quantum thermal machines through control of the system-bath coupling
Isothermal transformations are minimally dissipative but slow processes, as the system
needs to remain close to thermal equilibrium along the protocol. Here, we show that …
needs to remain close to thermal equilibrium along the protocol. Here, we show that …
Quantum sensing of temperature close to absolute zero in a Bose-Einstein condensate
JB Yuan, B Zhang, YJ Song, SQ Tang, XW Wang… - Physical Review A, 2023 - APS
We propose a theoretical scheme for quantum sensing of temperature close to absolute zero
in a quasi-one-dimensional Bose-Einstein condensate (BEC). In our scheme, a single-atom …
in a quasi-one-dimensional Bose-Einstein condensate (BEC). In our scheme, a single-atom …
Controlling Rydberg atom excitations in dense background gases
TC Liebisch, M Schlagmüller, F Engel… - Journal of Physics B …, 2016 - iopscience.iop.org
We discuss the density shift and broadening of Rydberg spectra measured in cold, dense
atom clouds in the context of Rydberg atom spectroscopy done at room temperature, dating …
atom clouds in the context of Rydberg atom spectroscopy done at room temperature, dating …
Criticality-enhanced precision in phase thermometry
Temperature estimation of interacting quantum many-body systems is both a challenging
task and topic of interest in quantum metrology, given that critical behavior at phase …
task and topic of interest in quantum metrology, given that critical behavior at phase …
Coherent and dephasing spectroscopy for single-impurity probing of an ultracold bath
D Adam, Q Bouton, J Nettersheim, S Burgardt… - Physical Review Letters, 2022 - APS
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 …
an ultracold Rb bath. We record both the interaction-driven phase evolution and the decay of …
Quantum spin dynamics of individual neutral impurities coupled to a Bose-Einstein condensate
We report on spin dynamics of individual, localized neutral impurities immersed in a Bose-
Einstein condensate. Single cesium atoms are transported into a cloud of rubidium atoms …
Einstein condensate. Single cesium atoms are transported into a cloud of rubidium atoms …