%0 Journal Article %T Quantum error avoiding code based on the decoherence-free subspace
基于无消相干子空间的量子避错码设计 %A Zhang Quan %A Zhang Er-Yang %A Tang Chao-Jing %A
张权 %A 张尔扬 %A 唐朝京 %J 物理学报 %D 2002 %I %X It has been proved that there exist coherence preserving states which are stable under collective decoherence.Such states are called decoherence free states.All the coherence preserving states constitute a subspace named decoherence free subspace(DFS).DFS can be used to construct quantum error avoiding code which is fault tolerant automatically.We first propose a definition for DFS in this paper,and then prove that nearly all definitions are equivalent.We also prove when there may exist DFS.Finally we show a straightforward way to find the base states of DFS utilizing group theory. %K coherence %K preserving state %K decoherence %K free subspace %K quantum error avoiding code %K fault %K tolerant quantum computation
相干保持态 %K 无消相干子空间 %K 量子避错码 %K 容错量子计算 %U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=8C57F16BAE44D925&yid=C3ACC247184A22C1&vid=987EDA49D8A7A635&iid=5D311CA918CA9A03&sid=A43DA3A1D8511541&eid=E652F68A3FDC0E89&journal_id=1000-3290&journal_name=物理学报&referenced_num=10&reference_num=15