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Energy gaps and interaction blockade in confined quantum systems

Energy gaps and interaction blockade in confined quantum systems
Energy gaps and interaction blockade in confined quantum systems
We investigate universal properties of strongly confined particles that turn out to be dramatically different from what is observed for electrons in atoms and molecules. For a large class of harmonically confined systems, such as small quantum dots and optically trapped atoms, many-body particle addition and removal energies, and energy gaps, are accurately obtained from single-particle eigenvalues. Transport blockade phenomena are related to the derivative discontinuity of the exchange-correlation functional. This implies that they occur very generally, with Coulomb blockade being a particular realization of a more general phenomenon. In particular, we predict a van der Waals blockade in cold atom gases in traps.
1-4
Capelle, K.
552410e6-6158-40ac-84a5-166d8dbcf02d
Borgh, M.
a3c181f8-0535-46cd-bb9a-6e930a81f86e
Kärkkäinen, K.
7285f0df-8b7a-4124-b995-69c9002ecd19
Reimann, S.M.
5deb90dc-8734-4b9f-b760-93e99838cb81
Capelle, K.
552410e6-6158-40ac-84a5-166d8dbcf02d
Borgh, M.
a3c181f8-0535-46cd-bb9a-6e930a81f86e
Kärkkäinen, K.
7285f0df-8b7a-4124-b995-69c9002ecd19
Reimann, S.M.
5deb90dc-8734-4b9f-b760-93e99838cb81

Capelle, K., Borgh, M., Kärkkäinen, K. and Reimann, S.M. (2007) Energy gaps and interaction blockade in confined quantum systems. Physical Review Letters, 99 (1), 1-4. (doi:10.1103/PhysRevLett.99.010402).

Record type: Article

Abstract

We investigate universal properties of strongly confined particles that turn out to be dramatically different from what is observed for electrons in atoms and molecules. For a large class of harmonically confined systems, such as small quantum dots and optically trapped atoms, many-body particle addition and removal energies, and energy gaps, are accurately obtained from single-particle eigenvalues. Transport blockade phenomena are related to the derivative discontinuity of the exchange-correlation functional. This implies that they occur very generally, with Coulomb blockade being a particular realization of a more general phenomenon. In particular, we predict a van der Waals blockade in cold atom gases in traps.

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Published date: 2 July 2007
Organisations: Applied Mathematics

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Local EPrints ID: 198743
URI: https://eprints.soton.ac.uk/id/eprint/198743
PURE UUID: 2225a6f1-85e1-4191-9efa-3ffd0fc63cf3

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Date deposited: 06 Oct 2011 14:23
Last modified: 18 Jul 2017 11:17

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