Prosiectau fesul blwyddyn
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For finitedimensional quantum systems, such as qubits, a well established strategy to protect such systems from decoherence is dynamical decoupling. However many promising quantum devices, such as oscillators, are infinite dimensional, for which the question if dynamical decoupling could be applied remained open. Here we first show that not every infinitedimensional system can be protected from decoherence through dynamical decoupling. Then we develop dynamical decoupling for continuous variable systems which are described by quadratic Hamiltonians. We identify a condition and a set of operations that allow us to map a set of interacting harmonic oscillators onto a set of noninteracting oscillators rotating with an averaged frequency, a procedure we call homogenization. Furthermore we show that every quadratic systemenvironment interaction can be suppressed with two simple operations acting only on the system. Using a random dynamical decoupling or homogenization scheme, we develop bounds that characterize how fast we have to work in order to achieve the desired uncoupled dynamics. This allows us to identify how well homogenization can be achieved and decoherence can be suppressed in continuous variable systems
Iaith wreiddiol  Saesneg 

Rhif yr erthygl  135303 
Cyfnodolyn  Journal of Physics A: Mathematical and Theoretical 
Cyfrol  50 
Rhif cyhoeddi  13 
Dynodwyr Gwrthrych Digidol (DOIs)  
Statws  Cyhoeddwyd  03 Maw 2017 
Ôl bys
Gweld gwybodaeth am bynciau ymchwil 'Dynamic decoupling and homogenization of continuous variable systems'. Gyda’i gilydd, maen nhw’n ffurfio ôl bys unigryw.Prosiectau
 1 Wedi Gorffen

Control characterisation of noisy quantum devices
Burgarth, D. (Prif Ymchwilydd)
Engineering & Physical Sciences Research Council
01 Meh 2015 → 30 Medi 2016
Prosiect: Ymchwil a ariannwyd yn allanol