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Proceedings Paper

Incoherent control and entanglement for two-dimensional coupled systems
Author(s): Raffaele Romano; Domenico D'Alessandro
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Paper Abstract

We study a new approach to the control of a quantum system S, which uses the coupling of S with a quantum probe P. The external control affects only P, and the accessibility and controllability properties describe to what extent it is possible to drive the state of S by varying the initial state of P and using the interaction between the two systems. In particular, we study the case of two-dimensional system and probe. Two situations are considered: either the total system S + P is a closed one, or it is surrounded by a bath of decoupled harmonic oscillators. We give results on the controllability and accessibility properties of this scheme, and we discuss the relation of these properties with the entangling capability of the interaction between S and P. In particular, we show that the SWAP operator plays a special role.

Paper Details

Date Published: 12 May 2006
PDF: 10 pages
Proc. SPIE 6244, Quantum Information and Computation IV, 62440E (12 May 2006); doi: 10.1117/12.664735
Show Author Affiliations
Raffaele Romano, Iowa State Univ. (United States)
Domenico D'Alessandro, Iowa State Univ. (United States)

Published in SPIE Proceedings Vol. 6244:
Quantum Information and Computation IV
Eric J. Donkor; Andrew R. Pirich; Howard E. Brandt, Editor(s)

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