Coherence control between two quantum systems using spatial phase
Journal
Physics Letters, Section A: General, Atomic and Solid State Physics
Journal Volume
315
Journal Issue
1-2
Pages
16-22
Date Issued
2003
Author(s)
Abstract
In this Letter, we investigate new method of generating and controlling quantum coherences between two two-level quantum systems by using the spatial phase of one single-mode incident laser pulse. We take two identical semiconductor quantum dots as an illustration. Our method is to use the spatial phase of the laser pulse at the different positions of the quantum systems for the operations similar to two-qubit operations in the quantum computer language, rather than to employ the frequently used dipole-dipole interactions between them. In the present Letter, a specific operation similar to two-qubit quantum operation is examined numerically. Our investigation demonstrates that the spatial phase will also be useful for quantum operations. © 2003 Elsevier B.V. All rights reserved.
Type
journal article