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Transport and interaction blockade of cold bosonic atoms in a triple-well potential

Schlagheck, P.; Malet, Francesc LU ; Cremon, Jonas LU and Reimann, Stephanie LU (2010) In New Journal of Physics 12.
Abstract
We theoretically investigate the transport properties of cold bosonic atoms in a quasi-one-dimensional (1D) triple-well potential that consists of two large outer wells, which act as microscopic source and drain reservoirs, and a small inner well, which represents a quantum-dot-like scattering region. Bias and gate 'voltages' introduce a time-dependent tilt of the triple-well configuration, and are used to shift the energetic level of the inner well with respect to the outer ones. By means of exact diagonalization considering a total number of six atoms in the triple-well potential, we find diamond-like structures for the occurrence of single-atom transport in the parameter space spanned by the bias and gate voltages. We discuss the... (More)
We theoretically investigate the transport properties of cold bosonic atoms in a quasi-one-dimensional (1D) triple-well potential that consists of two large outer wells, which act as microscopic source and drain reservoirs, and a small inner well, which represents a quantum-dot-like scattering region. Bias and gate 'voltages' introduce a time-dependent tilt of the triple-well configuration, and are used to shift the energetic level of the inner well with respect to the outer ones. By means of exact diagonalization considering a total number of six atoms in the triple-well potential, we find diamond-like structures for the occurrence of single-atom transport in the parameter space spanned by the bias and gate voltages. We discuss the analogy with Coulomb blockade in electronic quantum dots, and point out how one can infer the interaction energy in the central well from the distance between the diamonds. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
New Journal of Physics
volume
12
publisher
IOP Publishing Ltd.
external identifiers
  • wos:000279878000007
  • scopus:77955065431
ISSN
1367-2630
DOI
10.1088/1367-2630/12/6/065020
language
English
LU publication?
yes
id
523d9f89-b205-4655-9c0e-b148dd9265ae (old id 1657369)
date added to LUP
2010-08-25 11:49:25
date last changed
2018-05-29 11:19:52
@article{523d9f89-b205-4655-9c0e-b148dd9265ae,
  abstract     = {We theoretically investigate the transport properties of cold bosonic atoms in a quasi-one-dimensional (1D) triple-well potential that consists of two large outer wells, which act as microscopic source and drain reservoirs, and a small inner well, which represents a quantum-dot-like scattering region. Bias and gate 'voltages' introduce a time-dependent tilt of the triple-well configuration, and are used to shift the energetic level of the inner well with respect to the outer ones. By means of exact diagonalization considering a total number of six atoms in the triple-well potential, we find diamond-like structures for the occurrence of single-atom transport in the parameter space spanned by the bias and gate voltages. We discuss the analogy with Coulomb blockade in electronic quantum dots, and point out how one can infer the interaction energy in the central well from the distance between the diamonds.},
  author       = {Schlagheck, P. and Malet, Francesc and Cremon, Jonas and Reimann, Stephanie},
  issn         = {1367-2630},
  language     = {eng},
  publisher    = {IOP Publishing Ltd.},
  series       = {New Journal of Physics},
  title        = {Transport and interaction blockade of cold bosonic atoms in a triple-well potential},
  url          = {http://dx.doi.org/10.1088/1367-2630/12/6/065020},
  volume       = {12},
  year         = {2010},
}