Method for quantum-jump continuous-time quantum error correction
Method for quantum-jump continuous-time quantum error correction
复制标题
量子跳跃连续时间量子纠错方法
DOI:
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发表时间:
2015
期刊:
影响因子:
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通讯作者:
T. Brun
中科院分区:
文献类型:
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作者:
Kung;T. Brun
Continuous-time quantum error correction (CTQEC) is a technique for protecting quantum information against decoherence, where both the decoherence and error correction processes are considered continuous in time. Given any [[n,k,d]] quantum stabilizer code, we formulate a class of protocols to implement CTQEC, involving weak coherent measurements and weak unitary corrections. Under this formalism, we show that the minimal required size of the ancillary system is n-k+1 qubits, and we propose one scheme that meets this minimal requirement. Furthermore, we compare our method with other known schemes, and show that a particular measure of performance described in this paper is better when using our method.