Volume 53, Number 6, March 2001
|Page(s)||776 - 782|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 December 2003|
Localization and entanglement of two interacting electrons in a quantum-dot molecule
Center for Quantized Electronic Structures (QUEST)
and Department of Chemistry
University of California -
Santa Barbara, CA 93106-9510, USA
Corresponding author: firstname.lastname@example.org
Accepted: 11 January 2001
The localization of two interacting electrons in a coupled-quantum-dots semiconductor structure is demonstrated through numerical calculations of the time evolution of the two-electron wave function including the Coulomb interaction between the electrons. The transition from the ground state to a localized state is induced by an external, time-dependent, uniform electric field. It is found that while an appropriate constant field can localize both electrons in one of the wells, oscillatory fields can induce roughly equal probabilities for both electrons to be localized in either well, generating an interesting type of localized and entangled state. We also show that shifting the field suddenly to an appropriate constant value can maintain in time both types of localization.
PACS: 73.23.-b – Electronic transport in mesoscopic systems / 82.90.+j – Other topics in physical chemistry and chemical physics / 03.65.Ud – Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.)
© EDP Sciences, 2001
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