171 citations · 399 across the 12 of their papers we have counts for
12 papers
Two Nambu-Goldstone zero modes for rotating Bose-Einstein condensates
Rodney E. S. Polkinghorne, Tapio P. Simula
We consider rotating finite size vortex arrays in Bose-Einstein condensates that are confined by cylindrically symmetric external potentials. We show that such systems possess two…
Geometric phases of a vortex in a superfluid
Rodney E. S. Polkinghorne, Andrew J. Groszek, Tapio P. Simula
We consider geometric phases of mobile quantum vortices in superfluid Bose-Einstein condensates. Haldane and Wu [Phys. Rev. Lett. 55, 2887 (1985)] showed that the geometric phase,…
Dynamics of transient cat-states in degenerate parametric oscillation with and without nonlinear Kerr interactions
R. Y. Teh, F. -X. Sun, R. E. S. Polkinghorne +4
A cat-state is formed as the steady-state solution for the signal mode of an ideal, degenerate parametric oscillator, in the limit of negligible single-photon signal loss. In the p…
Phase-space representations of thermal Bose-Einstein condensates
King Ng, Rodney Polkinghorne, Bogdan Opanchuk +1
Phase-space methods allow one to go beyond the mean-field approximation to simulate the quantum dynamics of interacting fields. Here, we obtain a technique for initializing either…
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…
Quantum dynamics in ultra-cold atomic physics
Q. Y. He, M. D. Reid, B. Opanchuk +3
We review recent developments in the theory of quantum dynamics in ultra-cold atomic physics, including exact techniques, but focusing on methods based on phase-space mappings that…
Quantum trajectories for the realistic measurement of a solid-state charge qubit
Neil P. Oxtoby, P. Warszawski, H. M. Wiseman +2
We present a new model for the continuous measurement of a coupled quantum dot charge qubit. We model the effects of a realistic measurement, namely adding noise to, and filtering,…
Single-Electron Measurements with a Micromechanical Resonator
R. E. S. Polkinghorne, G. J. Milburn
A mechanical electroscope based on a change in the resonant frequency of a cantilever one micron in size in the presence of charge has recently been fabricated. We derive the decoh…
Reply to Comment on ``Proposal for the Measurement of Bell-Type Correlations from Continuous Variables''
T. C. Ralph, W. J. Munro
Recently K. Banaszek, I. A. Walmsley, K. Wodkiewicz (quant-ph/0012097) commented on our Proposal for the Measurement of Bell-Type Correlations from Continuous Variables [T. C. Ralp…
Proposal for the Measurement of Bell-like Correlations from Continuous Variables
T. C. Ralph, W. J. Munro, R. E. S. Polkinghorne
We show theoretically that Bell-type correlations can be observed between continuous variable measurements performed on a parametric source. An auxiliary measurement, performed on…
Entanglement swapping using continuous variables
R. E. S. Polkinghorne, T. C. Ralph
We investigate the efficacy with which entanglement can be teleported using a continuous measurement scheme. We show that by using the correct gain for the classical channel the de…
Characterizing teleportation in optics
T. C. Ralph, R. E. S. Polkinghorne, P. K. Lam
We discuss the characterization of continuous variable, optical quantum teleportation in terms of the two quadrature signal transfer and conditional variances between the input and…