Title :
Relaxation and Decoherence Induced by an External Circuit of a Driven SQUID Flux Qubit
Author :
Zhou, Zhongyuan ; Chu, Shih-I ; Han, Siyuan
Author_Institution :
Kansas Univ., Lawrence
fDate :
6/1/2007 12:00:00 AM
Abstract :
A theory on the dynamics of a driven dissipative multilevel quantum system is applied to investigate relaxation and decoherence induced by an external circuit of a resonantly driven SQUID flux qubit. It is shown that in the case of weak field and weak damping the numerical and analytical results are in excellent agreement. It is also shown that the SQUID qubit can be optimized by varying external circuit parameters.
Keywords :
SQUIDs; damping; quantum computing; superconducting junction devices; Josephson junction; dissipative multilevel quantum system; external circuit parameters; quantum computing; resonantly driven SQUID flux qubit; weak damping; Coupling circuits; Damping; Equations; Josephson junctions; Microwave circuits; Quantum computing; RLC circuits; Resonance; SQUIDs; Superconducting microwave devices; Dephasing; SQUID flux qubits; quantum computing; relaxation;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.898121
