Entanglement Changes under Various Spin-Environment Models

다국어 초록 (Multilingual Abstract)

We have studied the effects of various environments on the degree of entanglement of a two- qubit system with no direct interaction. The interaction between the system and the environment is considered as a two-spin interaction. We have focused on the case in which each system qubit interacts with different environment qubits so that indirect interactions are not involved. The results show that the two-qubit system with no initial entanglement that has no direct interaction can be entangled only under interactions with entangled elements in a common bath. This implies that an entanglement of the environment can be transferred to an entanglement of a two-qubit system that has no direct and indirect interactions.

참고문헌 (Reference)

1 F. Benatti, 91 : 070402-, 2003

2 M. S. Kim, 65 : 040101-, 2002

3 S. Schneider, 65 : 042107-, 2002

4 D. Braun, 89 : 277901-, 2002

5 W. H. Zurek, 26 : 1862-, 1982

6 J. Schliemann, 15 : R1809-, 2003

7 N. V. Prokof'ev, 63 : 669-, 2000

8 T. Choi, 76 : 012308-, 2007

9 L. Jakobczyk, 35 : 6368-, 2002

10 J.-H. An, "qunat/ph/0604020"

11 J. Zhang, "quant-ph/0611170"

12 F. Benatti, "quant-ph/0607049"

13 Jungmin Lee, "Multipartite Entanglement Manipulation by Inherent Interactions" 한국물리학회 51 (51): 252-257, 2007

14 Soojoon Lee, "Faithful sharing of multipartite entanglement over noisy quantum channels" 한국물리학회 45 (45): 1119-1122, 2004

15 Yong Wook Cheong, "Entanglement Swapping of Generalized GHZ States" 한국물리학회 48 (48): 1233-1236, 2006

16 Hyuk-jae Lee, "Entanglement Description of a Pure Multiqubit" 한국물리학회 49 (49): 2235-2238, 2006