One-step generation of cluster states in superconducting charge qubits coupled with a nanomechanical resonator
- Department of Physics, Shaoxing College of Arts and Sciences, Shaoxing 312000 (China)
- Institute of Theoretical Physics, Shanxi University, Taiyuan 030006 (China)
We present a scalable solid-state system in which the superconducting charge qubits are coupled with a nanomechanical resonator (NAMR) to achieve highly entangled cluster states, which are responsible for one-way quantum computing via single-qubit measurements. Since the NAMR can play the essential role of the data bus, the long-range interactions among the qubits can occur. Therefore, without using the interacting picture we can directly obtain the long-range Ising-like unitary operator U{sub z}({lambda})=exp[i{lambda}S{sub z}{sup 2}] with S{sub z} the collective spin operator in z direction and {lambda} a parameter, which is insensitive to the thermal state of the NAMR. Based on this unitary operator, a set of highly entangled cluster states can be produced by efficient one-step generation. Moreover, the robustness of the highly entangled cluster states with respect to unavoidable parameter variations is also demonstrated.
- OSTI ID:
- 21016061
- Journal Information:
- Physical Review. A, Vol. 76, Issue 2; Other Information: DOI: 10.1103/PhysRevA.76.024301; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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