Spatial decoherence factor via the qubit-field interaction
arXiv:0809.1813 · doi:10.1140/epjd/e2009-00151-4
Abstract
We analyze the time evolution of an initial spatial coherence for a two level atom whose internal degrees of freedom interact with a single mode of a cavity field. When the qubit-field subsystem is taken as an environment, the translational dynamics experiences a decoherence process which may be encoded in a decoherence factor D. We find that the field statistics affects D through the alternative paths the system-environment may follow along their entanglement, while eventual field phase properties give rise to an imaginary part of D which is related to the atomic translation. From the decoherence perspective, we analyze the relation between the atomic momentum and the imaginary part of the atomic spatial density matrix, and some considerations on its asymptotic behavior are brought into question at the conclusion of the paper.
arXiv commenttitle changed, minor revisions, references added
References in corpus (10)
- Decoherence, einselection, and the quantum origins of the classical
- Decoherence, the measurement problem, and interpretations of quantum mechanics
- Irreversible decay of nonlocal entanglement via a reservoir of a single degree of freedom
- Motional effects of single trapped atomic/ionic qubit
- Moving Atom-Field Interactions: Quantum Motional Decoherence and Relaxation
- Localization of Relative-Position of Two Atoms Induced by Spontaneous Emission
- Quantum erasure within the Optical Stern-Gerlach Model
- The non dissipative damping of the Rabi oscillations as a "which-path" information
- On the observability of Bell's inequality violation in the optical Stern-Gerlach model
- Translational dynamics effects on the non-local correlations between two atoms