Effective operator formalism for open quantum systems
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Effective operator formalism for open quantum systems. / Reiter, Florentin; Sørensen, Anders Søndberg.
I: Physical Review A (Atomic, Molecular and Optical Physics), Bind 85, Nr. 3, 09.03.2012, s. 032111.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Effective operator formalism for open quantum systems
AU - Reiter, Florentin
AU - Sørensen, Anders Søndberg
PY - 2012/3/9
Y1 - 2012/3/9
N2 - We present an effective operator formalism for open quantum systems. Employing perturbation theory and adiabatic elimination of excited states for a weakly driven system, we derive an effective master equation which reduces the evolution to the ground-state dynamics. The effective evolution involves a single effective Hamiltonian and one effective Lindblad operator for each naturally occurring decay process. Simple expressions are derived for the effective operators which can be directly applied to reach effective equations of motion for the ground states. We compare our method with the hitherto existing concepts for effective interactions and present physical examples for the application of our formalism, including dissipative state preparation by engineered decay processes.
AB - We present an effective operator formalism for open quantum systems. Employing perturbation theory and adiabatic elimination of excited states for a weakly driven system, we derive an effective master equation which reduces the evolution to the ground-state dynamics. The effective evolution involves a single effective Hamiltonian and one effective Lindblad operator for each naturally occurring decay process. Simple expressions are derived for the effective operators which can be directly applied to reach effective equations of motion for the ground states. We compare our method with the hitherto existing concepts for effective interactions and present physical examples for the application of our formalism, including dissipative state preparation by engineered decay processes.
U2 - 10.1103/PhysRevA.85.032111
DO - 10.1103/PhysRevA.85.032111
M3 - Journal article
VL - 85
SP - 032111
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 3
ER -
ID: 38148854