166 citations · 845 across the 29 of their papers we have counts for
8 papers · 1 filter
Nonlocal pair correlations in a higher-order Bose gas soliton
King Lun Ng, Bogdan Opanchuk, Margaret D. Reid +1
The truncated Wigner and positive-P phase-space representations are used to study the dynamics of a one-dimensional Bose gas. This allows calculations of the breathing quantum dyna…
The universe on a table top: engineering quantum decay of a relativistic scalar field from a metastable vacuum
Oleksandr Fialko, Bogdan Opanchuk, Andrei I. Sidorov +2
The quantum decay of a relativistic scalar field from a metastable state ("false vacuum decay") is a fundamental idea in quantum field theory and cosmology. This occurs via local f…
Fate of the false vacuum: towards realization with ultra-cold atoms
O. Fialko, B. Opanchuk, A. I. Sidorov +2
Quantum decay of a relativistic scalar field from a false vacuum is a fundamental idea in quantum field theory. It is relevant to models of the early Universe, where the nucleation…
Quantum simulations of the early universe
Bogdan Opanchuk, Rodney Polkinghorne, Oleksandr Fialko +2
A procedure is described whereby a linearly coupled spinor Bose condensate can be used as a physically accessible quantum simulator of the early universe. In particular, an experim…
Functional Wigner representation of BEC quantum dynamics
Bogdan Opanchuk, Peter D. Drummond
We develop a method of simulating the full quantum field dynamics of multi-mode multi-component Bose-Einstein condensates in a trap. We use the truncated Wigner representation to o…
Half-quantum vortex state in a spin-orbit coupled Bose-Einstein condensate
B. Ramachandhran, Bogdan Opanchuk, Xia-Ji Liu +3
We investigate theoretically the condensate state and collective excitations of a two-component Bose gas in two-dimensional harmonic traps subject to isotropic Rashba spin-orbit co…
Quantum noise in three-dimensional BEC interferometry
B. Opanchuk, M. Egorov, S. Hoffmann +2
We develop a theory of quantum fluctuations and squeezing in a three-dimensional Bose-Einstein condensate atom interferometer with nonlinear losses. We use stochastic equations in…
Long-lived periodic revivals of coherence in an interacting Bose-Einstein condensate
Mikhail Egorov, Russell P. Anderson, Valentin Ivannikov +4
We observe the coherence of an interacting two-component Bose-Einstein condensate (BEC) surviving for seconds in a trapped Ramsey interferometer. Mean-field driven collective oscil…