62 citations · 569 across the 16 of their papers we have counts for
17 papers
Probing the dynamic structure factor of a neutral Fermi superfluid along the BCS-BEC crossover using atomic impurity qubits
Mark T. Mitchison, Tomi H. Johnson, Dieter Jaksch
We study an impurity atom trapped by an anharmonic potential, immersed within a cold atomic Fermi gas with attractive interactions that realizes the crossover from a Bardeen-Cooper…
Nondestructive Probing of Means, Variances, and Correlations of Ultracold-Atomic-System Densities via Qubit Impurities
Thomas J. Elliott, Tomi H. Johnson
We show how impurity atoms can measure moments of ultracold atomic gas densities, using the example of bosons in a one-dimensional lattice. This builds on a body of work regarding…
Hubbard model for atomic impurities bound by the vortex lattice of a rotating BEC
T. H. Johnson, Y. Yuan, W. Bao +3
We investigate cold bosonic impurity atoms trapped in a vortex lattice formed by condensed bosons of another species. We describe the dynamics of the impurities by a bosonic Hubbar…
Thermometry of ultracold atoms via non-equilibrium work distributions
T. H. Johnson, F. Cosco, M. T. Mitchison +2
Estimating the temperature of a cold quantum system is difficult. Usually, one measures a well-understood thermal state and uses that prior knowledge to infer its temperature. In c…
Non-destructive selective probing of phononic excitations in a cold Bose gas using impurities
D. Hangleiter, M. T. Mitchison, T. H. Johnson +3
We introduce a detector that selectively probes the phononic excitations of a cold Bose gas. The detector is composed of a single impurity atom confined by a double-well potential,…
Capturing exponential variance using polynomial resources: applying tensor networks to non-equilibrium stochastic processes
T. H. Johnson, T. J. Elliott, S. R. Clark +1
Estimating the expected value of an observable appearing in a non-equilibrium stochastic process usually involves sampling. If the observable's variance is high, many samples are r…