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On characterizing quantum stochastic evolutions

Published online by Cambridge University Press:  24 October 2008

R. L. Hudson
Affiliation:
Department of Mathematics, University of Nottingham, Nottingham NG7 2RD
J. M. Lindsay
Affiliation:
Department of Mathematics, King's College, London WC2R 2LS

Extract

It has recently been shown [7, 8, 4] that Markov dilations of quantum dynamical semigroups may be constructed by solving corresponding quantum stochastic differential equations. These equations may be interpreted as describing the evolution of a quantum system with a singular coupling to a Boson reservoir, moreover, when solutions are combined with the free evolution of the reservoir, a reversible evolution results which may be interpreted as that of the system plus reservoir. It is the purpose of the present paper to characterize the above stochastic evolutions essentially by a condition of with respect to the free evolution.

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 1987

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References

REFERENCES

[1]Applebaum, D.. The strong Markov property for Fermion Brownian motion. J. Funct. Anal. 65 (1986), 273291.CrossRefGoogle Scholar
[2]Applebaum, D. and Hudson, R. L.. Fermion Ito's formula and stochastic evolutions. Commun. Math. Phys. 96 (1984), 473496.CrossRefGoogle Scholar
[3]Cockroft, A. M. and Hudson, R. L.. Quantum mechanical Wiener processes. J. Multivariate Anal. 7 (1978), 107124.CrossRefGoogle Scholar
[4]Frigerio, A.. Covariant Markov dilations of quantum dynamical semigroups. Publ. Res. Inst. Math. Sci. 21 (1985), 657675.CrossRefGoogle Scholar
[5]Hudson, R. L., Ion, P. D. F. and Parthasarathy, K. R.. Time-orthogonal unitary dilations and non-commutative Feynman-Kac formulae. Commun. Math. Phys. 83 (1982), 261280.CrossRefGoogle Scholar
[6]Hudson, R. L. and Lindsay, J. M.. Uses of non-Fock quantum Brownian motion and a quantum martingale representation theorem. In Quantum Probability and Applications II (Ed. Accardi, L. and von Waldenfels, W.) Lecture Notes in Mathematics 1136 (Springer, 1985).Google Scholar
[7]Hudson, R. L. and Parthasarathy, K. R.. Quantum Ito's formula and stochastic evolutions. Commun. Math. Phys. 93 (1984), 301323.CrossRefGoogle Scholar
[8]Hudson, R. L. and Parthasarathy, K. R.. Stochastic dilations of uniformly continuous completely positive semigroups. Acta Appl. Math. 2 (1984), 353398.CrossRefGoogle Scholar
[9]Hudson, R. L. and Parthasarathy, K. R.. Unification of Fermion and Boson stochastic calculus. Commun. Math. Phys. 104 (1986), 457470.CrossRefGoogle Scholar
[10]Lindsay, J. M.. A quantum stochasic calculus. Ph.D. thesis (Nottingham, 1985).Google Scholar
[11]Parthasarathy, K. R. and Sinha, K. B.. Stochastic integral representation of bounded quantum martingales in Fock space. J. Funct. Anal. 67 (1986), 126151.CrossRefGoogle Scholar