Quantum tunneling at excited states and macroscopic quantum coherence in ferromagnetic particles

Physics Letters, Section A: General, Atomic and Solid State Physics

Volumn 228, Issue 1-2, 1997, Pages 97-102

  Liang, J Q ^a,b,c   Muller Kirsten H J W ^a   Zhou, Jian Ge ^a   Pu, F C ^c,d  

^a University of Kaiserslautern ^*  (Germany)

^b SHANXI UNIVERSITY   (China)

^c INSTITUTE OF GEOLOGY AND GEOPHYSICS   (China)

^d Guangzhou Teachers College   (China)

Author keywords

[No Author keywords available]

Indexed keywords

EXCITED STATES; FERROMAGNETIC MATERIALS; FERROMAGNETISM; GROUND STATE; NATURAL FREQUENCIES; TEMPERATURE DISTRIBUTION;

EXPONENTIAL INCREASE; FERROMAGNETIC PARTICLES; LOW-LYING EXCITED STATE; MACROSCOPIC QUANTUM COHERENCE; ONE-LOOP CORRECTIONS; TEMPERATURE DEPENDENCE; TUNNELING PROBABILITIES; WKB APPROXIMATIONS;

QUANTUM THEORY;

EID: 0043264222     PISSN: 03759601     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0375-9601(97)00071-6     Document Type: Article

References (19)

1. A.J. Leggett, S. Chakravarty, A.T. Dorsey, M.P.A. Fisher, A. Garg and W. Zwerger, Rev. Mod. Phys. 59 (1987) 1.
2. A. Garg, Phys. Rev. Lett. 71 (1993) 4249.
3. E.M. Chudnovsky and L. Gunther, Phys. Rev. Lett. 60 (1988) 661.
4. J.-Q. Liang, H.J.W. Müller-Kirsten and J.-G. Zhou, University of Kaiserslautern report no. KL-TH 96/6, to be published in Z. Phys. B (1997).
5. D.D. Awschalom, J.F. Smyth, G. Grinstein, D.P. DiVincenzo and D. Loss, Phys. Rev. Lett. 68 (1992) 3092.
6. D.D. Awschalom, D.P. DiVincenzo, G. Grinstein and D. Loss, Phys. Rev. Lett. 71 (1993) 4276.
7. D.D. Awschalom, M.A. McCord and G. Grinstein, Phys. Rev. Lett. 65 (1990) 783.
8. L. Gunther, Phys. World 3 (1990) 28.
9. S.S. Schweber, An introduction to relativistic quantum field theory (Harper and Row, New York, 1961), p. 691.
10. J. G. Zhou, J.-Q. Liang, J. Burzlaff and H.J.W. Müller-Kirsten, Phys. Lett. A 224 (1996) 142.
11. A. Perelomov, Generalized coherent states and their applications (Springer, Berlin, 1986).
12. E. Fradkin, Field theories of condensed matter systems (Addison-Wesley, New York, 1991).
13. D. Loss, D.P. DiVincenzo and G. Grinstein, Phys. Rev. Lett. 69 (1992) 3232.
14. J.-Q. Liang and H.J.W. Müller-Kirsten, Phys. Rev. D 46 (1992) 4685; D 51 (1995) 718.
15. J.-Q. Liang and H.J.W. Müller-Kirsten, Phys. Rev. D 46 (1992) 4685; D 51 (1995) 718.
16. J.-Q. Liang and H.J.W. Müller-Kirsten, Phys. Lett. B 332 (1994) 129.
17. J.-G. Zhou, F. Zimmerschied, J.-Q. Liang and H.J.W. Müller-Kirsten, Phys. Lett. B 365 (1996) 163.
18. R.B. Dingle and H.J.W. Müller, J. Reine Angew. Math. 211 (1962) 11; P Achuthan, H.J.W. Müller-Kirsten and A. Wiedemann, Fortschr. Phys. 38 (1990) 142.
19. R.B. Dingle and H.J.W. Müller, J. Reine Angew. Math. 211 (1962) 11; P Achuthan, H.J.W. Müller-Kirsten and A. Wiedemann, Fortschr. Phys. 38 (1990) 142.