On effectiveness of protocol creating maximum entanglement of two charge-phase qubits by cavity field
文献类型：期刊论文
| 作者 | Gao Yi-Bo; Li Chong; Li, C , Dalian Univ Technol, Dept Phys, Dalian 116024, Peoples R China |
| 刊名 | COMMUNICATIONS IN THEORETICAL PHYSICS
 |
| 出版日期 | 2007 |
| 卷号 | 48期号:5页码:935-942 |
| 关键词 | Macroscopic Quantum States Decoherence Computation Codes Bits |
| ISSN号 | 0253-6102 |
| 英文摘要 | We revisit the protocols to create maximally entangled states between two Josephson junction (JJ) charge phase qubits coupled to a microwave field in a cavity as a quantum data bus. We analyze a novel mechanism of quantum decoherence due to the adiabatic entanglement between qubits and the data bus, the off-resonance microwave field. We show that even if the variable of the data bus can be adiabatically eliminated, the entanglement between the qubits and data bus remains and can decohere the superposition of two-particle state. Fortunately we can construct a decoherence-free subspace of two-dimension to against this adiabatic decoherence. To carry out the analytic study for this decollerence problem, we develop Frohlich transformation to re-derive the effective Hamiltonian of these systems, which is equivalent to that obtained from the adiabatic elimination approach. |
| 学科主题 | Physics |
| WOS记录号 | WOS:000251391800036 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5627]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Li, C , Dalian Univ Technol, Dept Phys, Dalian 116024, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao Yi-Bo,Li Chong,Li, C , Dalian Univ Technol, Dept Phys, Dalian 116024, Peoples R China. On effectiveness of protocol creating maximum entanglement of two charge-phase qubits by cavity field[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2007,48(5):935-942. |
| APA | Gao Yi-Bo,Li Chong,&Li, C , Dalian Univ Technol, Dept Phys, Dalian 116024, Peoples R China.(2007).On effectiveness of protocol creating maximum entanglement of two charge-phase qubits by cavity field.COMMUNICATIONS IN THEORETICAL PHYSICS,48(5),935-942. |
| MLA | Gao Yi-Bo,et al."On effectiveness of protocol creating maximum entanglement of two charge-phase qubits by cavity field".COMMUNICATIONS IN THEORETICAL PHYSICS 48.5(2007):935-942. |
入库方式： OAI收割
来源：理论物理研究所
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