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Theory of time-depe...
Theory of time-dependent transport in quantum dot systems
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- Fransson, Jonas (författare)
- Uppsala universitet,Fysiska institutionen,Condensed Matter Theory Group
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(creator_code:org_t)
- 2003-03-07
- 2003
- Engelska.
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Ingår i: International Journal of Quantum Chemistry. - : Wiley. - 0020-7608 .- 1097-461X. ; 92:6, s. 471-477
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The formulation of the time-dependent tunnel current in quantum dot (QD) systems in the (generalized) transfer Hamiltonian formalism is reconsidered, taking into account the nonorthogonality between the subsystems. Exploiting the fact that only the total charge in the system is conserved, in general, gives rise to a new formulation of the transport theory. As a result, it is shown necessary to depart from the orthodox picture, in which the current is treated as a local property of the system. A general formula for the current is derived. By expressing properties of the quantum dot in the Hubbard I approximation with the loop correction, thereby including strong correlations of the QD states, numerical results are given for various time-dependent source-drain voltages
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- transport theory
- time-dependence
- non-equilibrium
- tunneling
- mesoscopic system
- quantum dot
- non-orthogonality
- strong correlations
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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