Tsallis Entropies of Superposition States οf Two Photon-Subtracted SU(1,1) Coherent States and Entanglement Transfer to Qubits |
| Mai-Lin Liang, Bing Yuan and Jia-Nan Zhang
Physics Department, School of Science, Tianjin University, Tianjin 300072, China |
| Received: September 18, 2008; In final form: November 2, 2009 |
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| Entropy properties of the superposed photon-subtracted two-mode coherent states are quite different from that of the single state. Tsallis entropies of the superposed states have extreme values, while that of the single state change monotonously. Further, it is found that the positions of the maxima of the entropies are independent of the entropic index. Around the maxima of the entropies, the entanglement transfer from the superposed states to two initially separable qubits is nearly complete. |
| DOI: 10.12693/APhysPolA.116.1006 PACS numbers: 42.50.Dv, 03.65.Ud, 05.70.-a |