Optical Review

, Volume 6, Issue 3, pp 227–231 | Cite as

Quantum Phase Dynamics of Interaction between Photon Field and Magnetic System: Effects of Magnetic Quantum Tunnelling

  • Hidemi Nagao
  • Masayoshi Nakano
  • Yasuteru Shigeta
  • Kizashi Yamaguchi
5th International Conference on NEAR FIELD OPTICS and RELATED TECHNOLOGIES (NFO-5)

Abstract

We investigate the dynamics of probability distributions of an initially one-mode coherent field interacting with a four-state molecular system, which is a single magnet with a tunneling across an anisotropic barrier, using a numerically exact approach. The population for each state, the phase properties of and \(\langle{\rm cos}^2 \hat{\varphi}\rangle\), and \(\triangle {\rm cos}^2 \varphi(\equiv \langle {\rm cos}^2 \hat{\varphi}\rangle-{\langle {\rm cos} \hat{\varphi}\rangle}^2\)), the entropy are calculated for a model system. The model predicts that the molecule and field become asymptotically disentangled at half of the revival time, and that optical Schrödinger-cat and magnetic Schrödinger-cat states are generated.

Key words

quantum phase dynamics magnetic quantum tunnelling collapse and rivival phase properties Jaynes-Cummings model 

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References

  1. 1.
    B. W. Shore and P. L. Knight: J. Modern Opt. 40 (1993) 1195.Google Scholar
  2. 2.
    M. Nakano and K. Yamaguchi: Chem. Phys. Lett. 295 (1998) 317.CrossRefGoogle Scholar
  3. 3.
    V. Buzek, H. Moya-Cessa, P. L. Knight and S. J. D. Phoenix: Phys. Rev. A 45 (1992) 8190.CrossRefPubMedGoogle Scholar
  4. 4.
    J. R. Friedman, M. P. Sarachik, J. Tejada J and R. Ziolo: Phys. Rev. Lett. 76 (1996) 3830.CrossRefPubMedGoogle Scholar
  5. 5.
    R. Sessoli, H-L. Tsai, A. R. Schake, S. Wang, J. B. Vincent, K. Folting, D. Gatteschi, G. Christou and D. Hendrickson: J. Am. Chem. Soc. 115 (1993) 1804.CrossRefGoogle Scholar
  6. 6.
    H. Nagao, S, Yamanaka, M. Nishino, Y. Yoshioka and K. Yamaguchi: Chem. Phys. Lett, (in press)Google Scholar
  7. 7.
    M. Nakano and K. Yamaguchi: J. Chem. Phys. (1999) (to be published).Google Scholar
  8. 8.
    P. T. Pegg and S. M. Barnet: Europhys. Lett. 6 (1989) 483.Google Scholar

Copyright information

© The Optical Society of Japan 1999

Authors and Affiliations

  • Hidemi Nagao
    • 1
  • Masayoshi Nakano
    • 1
  • Yasuteru Shigeta
    • 1
  • Kizashi Yamaguchi
    • 1
  1. 1.Graduate School of Science, Osaka UniversityDepartment of ChemistryToyonaka, OsakaJapan

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