| Issue |
EPL
Volume 80, Number 5, December 2007
|
|
|---|---|---|
| Article Number | 57001 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/80/57001 | |
| Published online | 25 October 2007 | |
Electrostatic control of quantum dot entanglement induced by coupling to external reservoirs
Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid Cantoblanco, 28049 Madrid, Spain
Received:
11
September
2007
Accepted:
2
October
2007
We propose a quantum transport experiment to prepare and measure charge-entanglement between two electrostatically defined quantum dots. Coherent population trapping, as realized in cavity quantum electrodynamics, can be carried out by using a third quantum dot to play the role of the optical cavity. In our proposal, a pumping which is quantum mechanically indistinguishable for the quantum dots drives the system into a state with a high degree of entanglement. The whole effect can be switched on and off by means of a gate potential allowing both state preparation and entanglement detection by simply measuring the total current.
PACS: 73.21.La – Quantum dots / 73.23.Hk – Coulomb blockade; single-electron tunneling
© Europhysics Letters Association, 2007
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