https://doi.org/10.1007/s100530050058
Heisenberg picture operators in the stochastic wave function approach to open quantum systems
Albert-Ludwigs-Universität, Fakultät für Physik,
Hermann-Herder Straße 3, 79104 Freiburg im Breisgau,
Federal Republic of Germany
Corresponding authors: a breuer@physik.uni-freiburg.de - b bernd.kappler@physik.uni-freiburg.de - c petruccione@physik.uni-freiburg.de
Received:
30
May
1997
Revised:
4
November
1997
Accepted:
7
November
1997
Published online: 15 January 1998
A fast simulation algorithm for the calculation of multitime correlation functions of open quantum systems is presented. It is demonstrated that any stochastic process which "unravels" the quantum Master equation can be used for the calculation of matrix elements of reduced Heisenberg picture operators, and thus for the calculation of multitime correlation functions, by extending the stochastic process to a doubled Hilbert space. The numerical performance of the stochastic simulation algorithm is investigated by means of a standard example.
PACS: 42.50.Lc – Quantum fluctuations, quantum noise, and quantum jumps / 02.70.Lq – Monte Carlo and statistical methods
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1998
