Geometric discord of the Jaynes-Cummings model: pure dephasing regime

详细信息    查看全文

• 作者：Sina Hamedani Raja (1)
  Hamidreza Mohammadi (1) (2)
  Seyed Javad Akhtarshenas (1) (2) (3)
  
• 关键词：Quantum Information
• 刊名：The European Physical Journal D - Atomic, Molecular and Optical Physics
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：69
• 期：1
• 全文大小：1,165 KB
• 参考文献：1. T.S. Cubitt, F. Verstraete, W. Dur, J.I. Cirac, Phys. Rev. Lett. 91, 037902 (2003) CrossRef
  2. H. Ollivier, W.H. Zurek, Phys. Rev. Lett. 88, 017901 (2001) CrossRef
  3. L. Henderson, V. Vedral, J. Phys. A 34, 6899 (2001) CrossRef
  4. K. Modi, A. Brodutch, H. Cable, T. Paterek, V. Vedral, Rev. Mod. Phys. 84, 1655 (2012) CrossRef
  5. A. Brodutch, D.R. Terno, Phys. Rev. 81, 062103 (2010) CrossRef
  6. S. Luo, Phys. Rev. A 77, 042303 (2008) CrossRef
  7. R. Dillenschneider, Phys. Rev. B 78, 224413 (2008) CrossRef
  8. M.S. Sarandy, Phys. Rev. A 80, 022108 (2009) CrossRef
  9. M. Ali, A.R.P. Rau, G. Alber, Phys. Rev. A 81, 042105 (2010) CrossRef
  10. G. Adesso, A. Datta, Phys. Rev. Lett. 105, 030501 (2010) CrossRef
  11. P. Giorda, M.G.A. Paris, Phys. Rev. Lett. 105, 020503 (2010) CrossRef
  12. L.X. Cen, X.Q. Li, J. Shao, Y.J. Yan, Phys. Rev. A 83, 054101 (2011) CrossRef
  13. B. Dakic, V. Vedral, C. Brukner, Phys. Rev. Lett. 105, 190502 (2010) CrossRef
  14. B. Dakic et al., Nat. Phys. 8, 666 (2012) CrossRef
  15. S. Luo, S. Fu, Phys. Rev. A 82, 034302 (2010) CrossRef
  16. S. Luo, S. Fu, Phys. Rev. Lett. 106, 120401 (2011) CrossRef
  17. E.T. Jaynes, F.W. Cummings, Proc. IEEE 51, 89 (1963) CrossRef
  18. S. Furuichi, S. Nakamora, J. Phys. A 35, 5445 (2002) CrossRef
  19. S. Scheel, J. Eisert, P.L. Knight, M.B. Plenio, J. Mod. Opt. 50, 881 (2003) CrossRef
  20. S.J. Akhtarshenas, M. Farsi, Phys. Scr. 75, 608 (2007) CrossRef
  21. F. Beaudoin, J.M. Gambetta, A. Blais, Phys. Rev. A 84, 043832 (2011) CrossRef
  22. F. Altintas, R. Eryigit, Phys. Rev. A 87, 022124 (2013) CrossRef
  23. T. Wu, X. Song, L. Ye, Int. J. Mod. Phys. B 27, 1350136 (2013) CrossRef
  24. C. Jara-Figueroa, A.B. Kilmov, L. Roa, Eur. Phys. J. D 68, 51 (2014) CrossRef
  25. H. Prakash, M.K. Mishra, arXiv:1209.3683 (2012)
  26. H.A. Hessian, H. Ritsch, J. Phys. B 35, 4619 (2002) CrossRef
  27. R. Lo Franco, B. Bellomo, S. Maniscalco, G. Compagno, Int. J. Mod. Phys. B 27, 1345053 (2013) CrossRef
  28. G.J. Milburn, Phys. Rev. A 44, 5401 (1991) CrossRef
  29. H. Moya-Cessa, V. Buzek, M.S. Kim, P.L. Knight, Phys. Rev. A 48, 3900 (1993) CrossRef
  30. Shang-Bin Li, Jiang-Bo Xu, Phys. Lett. A 313, 175 (2003) CrossRef
  31. H. Mohammadi, S.J. Akhtarshenas, F. Kheirandish, Eur. Phys. J. D 62, 439 (2011) CrossRef
  32. C.W. Gardiner, / Quantum Noise (Springer-Verlag, Berlin, 1991)
  33. W.H. Louisell, / Quantum Statistical Properties of Radiation (Wiley, New York, 1973)
  34. J.-B. Xu, X.-B. Zou, J.-H. Yu, Eur. Phys. J. D 10, 295 (2000) CrossRef
  35. H. Georgi, / Lie Algebras in Particle Physics (Addison-Wesley Publishing Co., 1982)
  36. S. Luo, S. Fu, Phys. Rev. Lett. 106, 120401 (2011) CrossRef
  37. P. Rungta, V. Buzek, C.M. Caves, M. Hillery, G.J. Milburn, Phys. Rev. A 64, 042315 (2001) CrossRef
  38. J.M. Raimond, M. Brune, S. Haroche, Rev. Mod. Phys. 73, 565 (2001) CrossRef
  39. M. Brune et al., Phys. Rev. Lett. 77, 4887 (1996) CrossRef
  40. W.P. Schleich, / Quantum Optics in Phase Space (Wiley-VCH, 2001)
  
• 作者单位：Sina Hamedani Raja (1)
  Hamidreza Mohammadi (1) (2)
  Seyed Javad Akhtarshenas (1) (2) (3)
  
  1. Department of Physics, University of Isfahan, Isfahan, 81746, Iran
  2. Quantum Optics Group, University of Isfahan, Isfahan, 81746, Iran
  3. Department of Physics, Ferdowsi University of Mashhad, Mashhad, Iran
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Atoms, Molecules, Clusters and Plasmas
  Nanotechnology
  Quantum Physics
  Quantum Computing, Information and Physics
  Complexity
  Solid State Physics and Spectroscopy
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1434-6079

文摘

In this paper, the dynamical behaviour of the geometric discord of a system consisting of a two-level atom interacting with a quantised radiation field described by the Jaynes-Cummings model has been studied. The evolution of the system has been considered in the pure dephasing regime when the field is initially in a general pure state and the atom is initially in a mixed state. Dynamics of the geometric discord, as a measure of non-classical correlation, has been compared with the dynamics of negativity, as a measure of quantum entanglement. In particular, the influence of different parameters of system such as detuning and mixedness of the initial atomic state on the dynamics of geometric discord has been evaluated for when the field is initially in coherent and number states. It is shown that for asymptotically large times, the steady state geometric discord of the system presents a non-zero optimum value at some intermediate value of detuning.