The Effect of Local Structure and Non-uniformity on Decoherence-Free States of Charge Qubits

Details The Effect of Local Structure and Non-uniformity on Decoherence-Free States of Charge Qubits The Effect of Local Structure and Non-uniformity on Decoherence-Free States of Charge Qubits

2005-12-28

arxiv.org/abs/quant-ph/0512244v1

Physica E34, 530 (2006)

Physics

Quantum Physics

Scientific paper

10.1016/j.physe.2006.03.098

We analyze robustness of decoherence-free (DF) subspace in charge qubits when there are a local structure and non-uniformity that violate collective decoherence measurement condition. We solve master equations of up to four charge qubits and a detector as two serially coupled quantum point contacts (QPC) with an island structure. We show that robustness of DF states is strongly affected by local structure as well as by non-uniformities of qubits.

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