338 citations · 4.9k across the 109 of their papers we have counts for
9 papers · 1 filter
Linear entropy in quantum phase space
Laura E. C. Rosales-Zárate, P. D. Drummond
We calculate the quantum Renyi entropy in a phase space representation for either fermions or bosons. This can also be used to calculate purity and fidelity, or the entanglement be…
Coherence and Correlations in Atom Lasers
P. D. Drummond, T. Vaughan, J. F. Corney +2
We review and characterize the quantum coherence measures that are most useful for quantum gases, including Bose-Einstein condensates (BEC) and ultra-cold fermions, and outline how…
Excitation spectrum of bosons in a finite one-dimensional circular waveguide via the Bethe ansatz
Andrew G. Sykes, Peter D. Drummond, Matthew J. Davis
The exactly solvable Lieb-Liniger model of interacting bosons in one-dimension has attracted renewed interest as current experiments with ultra-cold atoms begin to probe this regim…
Correlations in a BEC collision: First-principles quantum dynamics with 150 000 atoms
P. Deuar, P. D. Drummond
The quantum dynamics of colliding Bose-Einstein condensates with 150 000 atoms are simulated directly from the Hamiltonian using the stochastic positive-P method. Two-body correlat…
Quantum limits to center-of-mass measurements
Timothy Vaughan, Peter Drummond, Gerd Leuchs
We discuss the issue of measuring the mean position (center-of-mass) of a group of bosonic or fermionic quantum particles, including particle number fluctuations. We introduce a st…
Quantum phase-space simulations of fermions and bosons
P. D. Drummond, J. F. Corney
We introduce a unified Gaussian quantum operator representation for fermions and bosons. The representation extends existing phase-space methods to Fermi systems as well as the imp…