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Quantum statistics of multiphoton unimolecular dissociation

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Il Nuovo Cimento D

Summary

We suggest a statistical model for the process of multiphoton unimolecular dissociation which considers the energy levels of the vibrational active mode, a quasi-continuous heat bath constituted by the energy levels of the remaining modes of the molecule and an electronically excited fragment resulting from the dissociation. The master equation for the system and expressions for the moments are derived and discussed in the standard second-quantization formalism. From the master equation the diagonal and off-diagonal density matrix elements are evaluated and some discussion on their applications to establish the change of light statistics is given.

Riassunto

Si suggerisce un modello statistico per il processo di dissociazione unimolecolare multifotonico che considera i livelli di energia del modo attivo vibrazionale, un bagno di calore quasi continuo costituito dai livelli di energia dei restanti modi della molecola e di un frammento eccitato elettronicamente che risulta dalla dissociazione. L’equazione master del sistema e le espressioni degl’impulsi sono derivate e discusse nel formalismo standard della seconda quantizzazione. Per l’equazione master, gli elementi di matrice della densità diagonali e al di fuori della diagonale sono calcolati e si discute sulle loro applicazioni per stabilire il cambiamento della statistica della luce.

Резюме

Мя предлагаем статистическую модель для процесса многофотонной мономолекулярной диссоциации. Эта модель учитывает энергетические уровни колебательной активной моды, энергетические квазинепрерывные уровни термостата, которые состоят из знергетических уровней оставшихся мод молекулы, и электронных возбуюдений фрагментов, образованных при диссоциации. Выводится задаюЩее уравнение для системы и выражения для моментов. Проводится обсуждение в рамках стандартного формализма вторичного квантования. С помощью задающего уравнения вычисляются диагональные и недиагональные элементы матрицы плотности. Проводится обсуюдение статистики света.

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References

  1. N. R. Isenor, V. Merchant, R. S. Hallsworth andM. C. Richardson:Can. J. Phys.,51, 1281 (1973).

    ADS  Google Scholar 

  2. R. V. Ambartzumian, N. V. Chekalin, V. S. Doljikov, V. S. Letokhov andE. A. Ryabov:Chem. Phys. Lett.,25, 515 (1974).

    Article  ADS  Google Scholar 

  3. R. V. Ambartzumian, V. S. Letokhov, E. A. Ryabov andN. V. Chekalin:Ž. Eksp. Teor. Fiz. Pis’ma Red.,20, 597 (1974) (English translation:JETP Lett.,20, 273 (1974).

    ADS  Google Scholar 

  4. R. V. Ambartzumian Yu. A. Gorokhov, V. S. Letokhov andG. N. Makarov:Ž. Ėksp. Teor. Fiz. Pis’ma Red.,21, 375 (1975) (English translation:JETP Lett.,21, 171 (1975)).

    ADS  Google Scholar 

  5. An excellent and almost complete review of both theoretical and experimental works isR. V. Ambartzumian andV. S. Letokhov: inChemical and Biochemical applications of lasers, Vol.3, edited byC. B. Moore (New York, N. Y., 1977), p. 167.

  6. M. J. Coggiola, P. A. Schult, Y. T. Lee andY. R. Shen:Phys. Rev. Lett.,38, 17 (1977).

    Article  ADS  Google Scholar 

  7. J. G. Black, E. Yablonovitch, N. Bloembergen andS. Mukamel:Phys. Rev. Lett.,38, 1131 (1977).

    Article  ADS  Google Scholar 

  8. E. R. Grant, P. A. Shultz, A. S. Sudbo, Y. R. Shen andY. T. Lee:Phys. Rev. Lett.,40, 115 (1978).

    Article  ADS  Google Scholar 

  9. S. MUkamel andJ. Jortner:J. Chem. Phys.,65, 5204 (1976).

    Article  ADS  Google Scholar 

  10. J. L. Lyman:J. Chem. Phys.,67, 1868 (1977).

    Article  ADS  Google Scholar 

  11. A. Nitzan andJ. Jortner:J. Chem. Phys.,71, 3524 (1979).

    Article  ADS  Google Scholar 

  12. J. Stone andM. F. Goodman:J. Chem. Phys.,71, 408 (1979).

    Article  ADS  Google Scholar 

  13. C. D. Cantrell andH. W. Galbraith:Opt. Commun.,18, 513 (1976);21, 374 (1977).

    Article  ADS  Google Scholar 

  14. D. M. Larsen andN. Bloembergen:Opt. Commun.,17, 254 (1976).

    Article  ADS  Google Scholar 

  15. V. S. Letokhov andA. A. Makarov:Opt. Commun.,17, 250 (1976).

    Article  ADS  Google Scholar 

  16. J. Stone, M. F. Goodman andD. A. Dows:J. Chem. Phys.,65, 5025 (1976).

    Google Scholar 

  17. D. P. Hodgkinson andJ. S. Briggs:J. Phys. B,10, 2583 (1977).

    Article  ADS  Google Scholar 

  18. J. T. Hougen:J. Chem. Phys. 65, 1035 (1976).

    Article  ADS  Google Scholar 

  19. M. Tamirand andR. D. Levine:Chem. Phys. Lett.,46, 208 (1977).

    Article  ADS  Google Scholar 

  20. R. V. Ambartzumian, Yu. A. Gorokhov, V. S. Letokhov andG. N. Makarov:Ž. Ėksp. Teor. Fiz.,69, 1956 (1975) (English translation:Sov. Phys. JETP,42, 993 (1976).

    Google Scholar 

  21. V. S. Letokhov: inProceedings of First International Conference on Multiphoton Process, Rochester, June 1977.

  22. V. S. Letokhov andA. A. Makarov:Appl. Phys.,16, 47 (1978).

    Article  ADS  Google Scholar 

  23. R. V. Ambartzumian, Yu. A. Gorokov, G. N. Makarov andA. A. Puretzkii:Ž. Ėksp. Teor. Fiz. Pis’ma Red.,23, 26 (1976) (English translation:JETP Lett.,23, 22 (1976).

    ADS  Google Scholar 

  24. N. Bloembergen, C. D. Cantrell andD. M. Larsen: inTunable Lasers Applications, edited byA. Mooradian, T. Jaeger andR. Stokseth,Springer Series in Optical Sciences, Vol.3 (Berlin, Heidelberg and New York, N. Y., 1976), p. 162.

  25. D. M. Larsen:Opt. Commun.,19, 404 (1976).

    Article  ADS  Google Scholar 

  26. V. M. Akulin, S. A. Alimpiev, N. V. Karlov andB. G. Sartokov:Ž. Ėksp. Teor. Fiz.,72, 88 (1977) (English translation:Sov. Phys. JETP,45, 47 (1977).

    ADS  Google Scholar 

  27. L. M. Narducci, S. S. Mitra, R. A. Shatas andC. A. Coulter:Phys. Rev. A,16, 247 (1977).

    Article  ADS  Google Scholar 

  28. L. M. Narducci andJ. M. Yuan:Phys. Rev. A,22, 261 (1980).

    Article  ADS  Google Scholar 

  29. R. V. Ambartzumian, V. S. Letokhov, G. N. Makarov andA. A. Puretzky:Opt. Commun.,25, 69 (1978).

    Article  ADS  Google Scholar 

  30. See, for example,W. Heitler:Quantum Theory of Radiation (Oxford, 1954), p. 54.

  31. K. J. Mc Neil andD. F. Walls:J. Phys. A,7, 618 (1974).

    ADS  Google Scholar 

  32. R. J. Glauber:Phys. Rev.,130, 2559 (1963).

    Article  MathSciNet  ADS  Google Scholar 

  33. R. Loudon: inThe Quantum Theory of Light (Oxford, 1973), p. 183.

  34. F. Bloch:Phys. Rev.,102, 104 (1956).

    Article  MATH  ADS  Google Scholar 

  35. L. D. Landau andE. M. Lifshitz: inMecánica cuántica no relativista (Barcelona, 1976), p. 44.

  36. M. O. Scully andK. G. Whitney:Tools of theoretical quantum optics, inProgress in Optics, Vol.10, edited byE. Wolf (New York, N. Y., 1972), p. 91.

  37. See, for example,L. J. Shiff:Quantum Mechanics (New York, N. Y., 1955), p. 189.

  38. R. J. Glauber:Phys. Rev.,131, 2766 (1963);Phys. Rev. Lett.,10, 84 (1963).

    Article  MathSciNet  ADS  Google Scholar 

  39. P. F. González-Díaz:J. Math. Phys. (N. Y.),22, 2689 (1981).

    Article  ADS  Google Scholar 

  40. M. Santos, D. García-Puente, P. García-Fernández andP. F. González-Díaz: to be published.

  41. P. García-Fernández, M. Santos, D. Garcíá-Puente andP. F. González-Díaz:Opt. Commun.,40, 451 (1982).

    Article  ADS  Google Scholar 

  42. H. Voigt, A. Bandilla andH. H. Ritze:Z. Phys. B,36, 295 (1980).

    Article  Google Scholar 

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González-Díaz, P.F., Santos, M. Quantum statistics of multiphoton unimolecular dissociation. Il Nuovo Cimento D 3, 389–407 (1984). https://doi.org/10.1007/BF02457467

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  • DOI: https://doi.org/10.1007/BF02457467

PACS. 33.80

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