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Concatenating dynamical decoupling with decoherence-free subspaces for quantum computation | | Yong Zhang
; Zheng-Wei Zhou
; Bo Yu
; Guang-Can Guo
; | | Date: |
11 Nov 2003 | | Journal: | Phys.Rev.A 69,042315(2004) DOI: 10.1103/PhysRevA.69.042315 | | Subject: | quant-ph | | Abstract: | A scheme to implement a quantum computer subjected to decoherence and governed by an untunable qubit-qubit interaction is presented. By concatenating dynamical decoupling through bang-bang (BB) pulse with decoherence-free subspaces (DFSs) encoding, we protect the quantum computer from environment-induced decoherence that results in quantum information dissipating into the environment. For the inherent qubit-qubit interaction that is untunable in the quantum system, BB control plus DFSs encoding will eliminate its undesired effect which spoils quantum information in qubits. We show how this quantum system can be used to implement universal quantum computation. | | Source: | arXiv, quant-ph/0311067 | | Services: | Forum | Review | PDF | Favorites | |
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