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2010 Volume 19 Issue 11
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Ji Ying-Hua, Xu Lin. 2010: Controlled decoherence of floating flux qubits, Chinese Physics B, 19(11): 73-77.
Citation: Ji Ying-Hua, Xu Lin. 2010: Controlled decoherence of floating flux qubits, Chinese Physics B, 19(11): 73-77.
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Controlled decoherence of floating flux qubits

  • College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China ;Key Laboratory of Optoelectronic and Telecommunication of Jiangxi, Nanchang 330022, China

  • College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China

  • Available Online: 30/11/2010
  • Fund Project: the National Natural Science Foundation of China (Grant 10864002)
  • In Born-Markov approximation, this paper calculates the energy relaxation time T1 and the decoherence time T2 of a floating flux qubit by solving the set of Bloch-Redfield equations. It shows that there are two main factors influencing the floating flux qubits: coupling capacitor in the circuit and the environment resistor. It also discusses how to improvethe quantum coherence time of a qubit. Through shunt connecting/series connecting inductive elements, an inductive environment resistor is obtained and further the reactance component of the environment resistor is improved, which is beneficial to the enhancement of decoherence time of floating flux qubits.
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Controlled decoherence of floating flux qubits

  • Available Online: 30/11/2010

Abstract: In Born-Markov approximation, this paper calculates the energy relaxation time T1 and the decoherence time T2 of a floating flux qubit by solving the set of Bloch-Redfield equations. It shows that there are two main factors influencing the floating flux qubits: coupling capacitor in the circuit and the environment resistor. It also discusses how to improvethe quantum coherence time of a qubit. Through shunt connecting/series connecting inductive elements, an inductive environment resistor is obtained and further the reactance component of the environment resistor is improved, which is beneficial to the enhancement of decoherence time of floating flux qubits.

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