Electrostatic control of quantum dot entanglement induced by coupling to external reservoirs

Details Electrostatic control of quantum dot entanglement induced by coupling to external reservoirs Electrostatic control of quantum dot entanglement induced by coupling to external reservoirs

2007-10-08

arxiv.org/abs/0710.1490v1

Europhysics Letters 80, 57001 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures, Latex2e with EPL macros, to appear in Europhysics Letters

Scientific paper

10.1209/0295-5075/80/57001

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.

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