Archive for February, 2013

Preprint: Toward engineered quantum many-body phonon systems

February 26th, 2013  |  by  |  published in All, News, Preprints

Preprint: Toward engineered quantum many-body phonon systems

Arrays of coupled cavity quantum phonodynamical systems in silicon are considered. We study physical systems that can exhibit, e.g., Mott insulator states of phonons due to a strong phonon-phonon interaction (which is mediated by the impurity-cavity-phonon coupling). Our results indicate that quantum many-body phonon systems are achievable both in on-chip nanomechanical systems in silicon and […]

Preprint: Spin-valley lifetimes in a silicon quantum dot with tunable valley splitting

February 6th, 2013  |  by  |  published in All, News, Preprints

Preprint: Spin-valley lifetimes in a silicon quantum dot with tunable valley splitting

Whilst silicon is a promising material for quantum computation, the degeneracy of the conduction band minima (valleys) must be lifted with a splitting sufficient to ensure formation of well-defined and long-lived spin qubits. Here we demonstrate that valley separation can be accurately tuned via electrostatic gate control in a metal-oxide-semiconductor quantum dot, providing splittings spanning […]

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