Now showing items 1-10 of 10

  • Coherence protection in coupled quantum systems 

    Cammack, Helen Mary; Kirton, Peter George; Stace, Thomas; Eastham, Paul; Keeling, Jonathan Mark James; Lovett, Brendon William (2018-02) - Journal article
    The interaction of a quantum system with its environment causes decoherence, setting a fundamental limit on its suitability for quantum information processing. However, we show that if the system consists of coupled parts ...
  • Designing spin-channel geometries for entanglement distribution 

    Levi, Elliott Kendrick; Kirton, Peter George; Lovett, Brendon William (2016-09-01) - Journal article
    We investigate different geometries of spin-1/2 nitrogen impurity channels for distributing entanglement between pairs of remote nitrogen vacancy centers (NVs) in diamond. To go beyond the system size limits imposed by ...
  • Efficient real-time path integrals for non-Markovian spin-boson models 

    Strathearn, Aidan; Kirton, Peter George; Lovett, Brendon William (2017-09) - Journal article
    Strong coupling between a system and its environment leads to the emergence of non-Markovian dynamics, which cannot be described by a time-local master equation. One way to capture such dynamics is to use numerical real-time ...
  • Excitonic spectral features in strongly coupled organic polaritons 

    Cwik, Justyna Agnieszka; Kirton, Peter George; de Liberato, Simone; Keeling, Jonathan Mark James (2016-03-22) - Journal article
    Starting from a microscopic model, we investigate the optical spectra of molecules in strongly coupled organic microcavities examining how they might self-consistently adapt their coupling to light. We consider both ...
  • Non-linear dynamics of a driven nanomechanical single electron transistor 

    Kirton, Peter George; Armour, A. D. (2013-04-09) - Journal article
    We analyze the response of a nanomechanical resonator to an external drive when it is also coupled to a single-electron transistor (SET). The interaction between the SET electrons and the mechanical resonator depends on ...
  • Nonequilibrium Model of Photon Condensation 

    Kirton, Peter George; Keeling, Jonathan Mark James (2013-09-04) - Journal article
    We develop a nonequilibrium model of condensation and lasing of photons in a dye filled microcavity. We examine in detail the nature of the thermalization process induced by absorption and emission of photons by the dye ...
  • Orientational alignment in cavity quantum electrodynamics 

    Keeling, Jonathan Mark James; Kirton, Peter George (2018-05-09) - Journal article
    We consider the orientational alignment of dipoles due to strong matter-light coupling, for a non-vanishing density of excitations. We compare various approaches to this problem in the limit of large numbers of emitters, ...
  • Polarization dynamics in a photon Bose-Einstein condensate 

    Moodie, Ryan; Kirton, Peter George; Keeling, Jonathan Mark James (2017-10) - Journal article
    It has previously been shown that a dye-filled microcavity can produce a Bose-Einstein condensate of photons. Thermalization of photons is possible via repeated absorption and re-emission by the dye molecules. In this ...
  • Superradiant and lasing states in driven-dissipative Dicke models 

    Kirton, Peter George; Keeling, Jonathan Mark James (2018-01) - Journal article
    We present the non-equilibrium phase diagram of a model which can demonstrate both Dicke-Hepp-Lieb superradiance and regular lasing by varying the coherent and incoherent driving terms. We find that the regions in the phase ...
  • Thermalization and breakdown of thermalization in photon condensates 

    Kirton, Peter George; Keeling, Jonathan Mark James (2015-03-20) - Journal article
    We examine in detail the mechanisms behind thermalization and Bose-Einstein condensation (BEC) of a gas of photons in a dye-filled microcavity. We derive a microscopic quantum model, based on that of a standard laser, and ...