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Simulation of motional averaging using a superconducting circuit

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arxiv 1401.7849 v1 pith:T7EMTKQW submitted 2014-01-30 cond-mat.mes-hall quant-ph

Simulation of motional averaging using a superconducting circuit

J. Li , M. P. Silveri , K. S. Kumar , J.-M. Pirkkalainen , A. Veps\"al\"ainen , W. C. Chien , J. Tuorila , M. A. Sillanp\"a\"a
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P. J. Hakonen E. V. Thuneberg G. S. Paraoanu
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classification cond-mat.mes-hall quant-ph
keywords quantumresultsaveragingcircuitmotionalsimulatesuperconductingtime
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The possibility of using a quantum system to simulate another one has been recognized for a long time as an important research direction in quantum information and quantum computing. In Ref. [J. Li et. al, Nat. Commun. 4, 1420 (2013)], a superconducting circuit (a transmon) was employed to simulate a NMR (nuclear magnetic resonance) effect known as motional averaging. In this paper we analyze the results of numerical integration of the time evolution of the density matrix of a qubit with random frequency fluctuations, and compare the results with those obtained by using the method of quantum trajectories. We show that both methods produce equivalent results, although some differences may appear in the range of intermediate modulation frequencies.

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