Disentanglement of two-qubit system in the Bloch channel |
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| Authors: | Masashi Ban |
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| Institution: | Graduate School of Humanities and Sciences, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo 112-8610, Japan |
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| Abstract: | Disentanglement of two qubits is studied in the relaxation process characterized by the longitudinal and transversal relaxation times, T1 and T2, which satisfy the inequality T2 ≤ 2T1 due to the complete positivity of the time-evolution. In the case of sufficiently low temperature, it is shown that whether the equality T2 = 2T1 is satisfied or not is of essential importance in the finite-time disentanglement. This is the characteristic feature of entanglement. |
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| Keywords: | Entanglement Decoherence Relaxation time |
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