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Experimental control of the transition from Markovian to non-Markovian dynamics of open quantum systems | | Bi-Heng Liu
; Li Li
; Yun-Feng Huang
; Chuan-Feng Li
; Guang-Can Guo
; Elsi-Mari Laine
; Heinz-Peter Breuer
; Jyrki Piilo
; | | Date: |
13 Sep 2011 | | Abstract: | Realistic quantum mechanical systems are always exposed to an external
environment. The presence of the environment often gives rise to a Markovian
process in which the system loses information to its surroundings. However,
many quantum systems exhibit a pronounced non-Markovian behavior in which there
is a flow of information from the environment back to the system, signifying
the presence of quantum memory effects [1-5]. The environment is usually
composed of a large number of degrees of freedom which are difficult to
control, but some sophisticated schemes for modifying the environment have been
developed [6]. The physical realization and control of dynamical processes in
open quantum systems plays a decisive role, for example, in recent proposals
for the generation of entangled states [7-9], for schemes of dissipative
quantum computation [10], for the design of quantum memories [11] and for the
enhancement of the efficiency in quantum metrology [12]. Here we report an
experiment which allows through selective preparation of the initial
environmental states to drive the open system from the Markovian to the
non-Markovian regime, to control the information flow between the system and
the environment, and to determine the degree of non-Markovianity by direct
measurements on the open system. | | Source: | arXiv, 1109.2677 | | Services: | Forum | Review | PDF | Favorites | |
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