Robustness of Decoherence-Free States for Charge Qubits under Local Non-uniformity
Mesoscale and Nanoscale Physics
2009-11-10 v1
Abstract
We analyze the robustness of decoherence-free (DF) subspace and subsystem in charge qubits, when difference from the collective decoherence measurement condition is large in the long time period, which is applicable for solid-state qubits using as a quantum memory. We solve master equations of up to four charge qubits and a detector as a quantum point contact (QPC). We show that robustness of DF states is strongly affected by local non-uniformities. We also discuss the possible two-qubit logical states by exactly solving the master equations.
Cite
@article{arxiv.cond-mat/0412694,
title = {Robustness of Decoherence-Free States for Charge Qubits under Local Non-uniformity},
author = {Tetsufumi Tanamoto and Shinobu Fujita},
journal= {arXiv preprint arXiv:cond-mat/0412694},
year = {2009}
}