Quantum random walk of the field in an externally driven cavity

Agarwal, G. S. ; Pathak, P. K. (2005) Quantum random walk of the field in an externally driven cavity Physical Review A, 72 (3). 033815_1-033815_6. ISSN 1050-2947

PDF - Publisher Version

Official URL: http://pra.aps.org/abstract/PRA/v72/i3/e033815

Related URL: http://dx.doi.org/10.1103/PhysRevA.72.033815


Using a resonant interaction between atoms and the field in a high-quality cavity, we show how to realize quantum random walks as proposed by Aharonov et al. [Phys. Rev. A 48, 1687 (1993)]. The atoms are driven strongly by a classical field. Under conditions of strong driving we could realize an effective interaction of the form iSx(a-a) in terms of the spin operator associated with the two-level atom and the field operators. This effective interaction generates displacement in the field's wave function depending on thestate of the two-level atom. Measurements of the state of the two-level atom would then generate an effective state of the field. Using a homodyne technique, the state of the quantum random walker can be monitored.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:11935
Deposited On:16 Nov 2010 13:57
Last Modified:16 May 2016 21:20

Repository Staff Only: item control page