Approaching classicality in quantum accelerator modes through decoherence. (2001)
Journal Article
d'Arcy, M., Godun, R., Oberthaler, M., Summy, G., Burnett, K., & Gardiner, S. (2001). Approaching classicality in quantum accelerator modes through decoherence. Physical review E: Statistical, nonlinear, and soft matter physics, 64(5), https://doi.org/10.1103/physreve.64.056233

We describe measurements of the mean energy of an ensemble of laser-cooled atoms in an atom optical system in which the cold atoms, falling freely under gravity, receive approximate δ-kicks from a pulsed standing wave of laser light. We call this sys... Read More about Approaching classicality in quantum accelerator modes through decoherence..

Cavity-assisted quasiparticle damping in a Bose-Einstein condensate. (2001)
Journal Article
Gardiner, S., Gheri, K., & Zoller, P. (2001). Cavity-assisted quasiparticle damping in a Bose-Einstein condensate. Physical Review A, 63(5), https://doi.org/10.1103/physreva.63.051603

We consider an atomic Bose-Einstein condensate held within an optical cavity and interacting with laser fields. We show how the interaction of the cavity mode with the condensate can cause energy due to excitations to be coupled to a lossy cavity mod... Read More about Cavity-assisted quasiparticle damping in a Bose-Einstein condensate..

Uniting Bose-Einstein Condensates in Optical Resonators. (2001)
Journal Article
Jaksch, D., Gardiner, S., Schulze, K., Cirac, J., & Zoller, P. (2001). Uniting Bose-Einstein Condensates in Optical Resonators. Physical Review Letters, 86(21), 4733-4736. https://doi.org/10.1103/physrevlett.86.4733

The relative phase of two initially independent Bose-Einstein condensates can be laser cooled to unite the two condensates by putting them into a ring cavity and coupling them with an internal Josephson junction. First, we show that this phase coolin... Read More about Uniting Bose-Einstein Condensates in Optical Resonators..

Nonlinear matter wave dynamics with a chaotic potential. (2000)
Journal Article
Gardiner, S., Jaksch, D., Dum, R., Cirac, J., & Zoller, P. (2000). Nonlinear matter wave dynamics with a chaotic potential. Physical Review A, 62(2), https://doi.org/10.1103/physreva.62.023612

We consider the case of a cubic nonlinear Schrödinger equation with an additional chaotic potential, in the sense that such a potential produces chaotic dynamics in classical mechanics. We derive and describe an appropriate semiclassical limit to suc... Read More about Nonlinear matter wave dynamics with a chaotic potential..

Quantum Chaos in an Ion Trap: The Delta-Kicked Harmonic Oscillator. (1997)
Journal Article
Gardiner, S., Cirac, J., & Zoller, P. (1997). Quantum Chaos in an Ion Trap: The Delta-Kicked Harmonic Oscillator. Physical Review Letters, 79(24), 4790-4793. https://doi.org/10.1103/physrevlett.79.4790

We propose an experimental configuration, within an ion trap, by which a quantum mechanical delta-kicked harmonic oscillator could be realized, and investigated. We show how to directly measure the sensitivity of the ion motion to small variations in... Read More about Quantum Chaos in an Ion Trap: The Delta-Kicked Harmonic Oscillator..

Nonclassical states and measurement of general motional observables of a trapped ion. (1997)
Journal Article
Gardiner, S., Cirac, J., & Zoller, P. (1997). Nonclassical states and measurement of general motional observables of a trapped ion. Physical Review A, 55(3), 1683-1694. https://doi.org/10.1103/physreva.55.1683

We describe a method to perform a single quantum measurement of an arbitrary motional observable of a single ion moving in a harmonic potential. We illustrate the measurement procedure with explicit examples, namely the position and phase observables... Read More about Nonclassical states and measurement of general motional observables of a trapped ion..

Decoherence, continuous observation, and quantum computing: A cavity QED model. (1995)
Journal Article
Pellizzari, T., Gardiner, S., Cirac, J., & Zoller, P. (1995). Decoherence, continuous observation, and quantum computing: A cavity QED model. Physical Review Letters, 75(21), 3788-3791. https://doi.org/10.1103/physrevlett.75.3788

We use the theory of continuous measurement to analyze the effects of decoherence on a realistic model of a quantum computer based on cavity QED. We show how decoherence affects the computation, and methods to prevent it.