Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 39
Filter
Add more filters










Publication year range
1.
J Phys Condens Matter ; 25(1): 014001, 2013 Jan 09.
Article in English | MEDLINE | ID: mdl-23220952

ABSTRACT

Various sophisticated approximation methods exist for the description of quantum many-body systems. It was realized early on that the theoretical description can simplify considerably in one-dimensional systems and various exact solutions exist. The focus in this introductory paper is on fermionic systems and the emergence of the Luttinger liquid concept.


Subject(s)
Models, Chemical , Models, Molecular , Quantum Theory , Rheology/methods , Solutions/chemistry , Computer Simulation
2.
J Phys Condens Matter ; 21(21): 215608, 2009 May 27.
Article in English | MEDLINE | ID: mdl-21825557

ABSTRACT

We study electronic transport through a one-dimensional, finite-length quantum wire of correlated electrons (Luttinger liquid) coupled at arbitrary position via tunnel barriers to two semi-infinite, one-dimensional as well as stripe-like (two-dimensional) leads, thereby bringing theory closer towards systems resembling set-ups realized in experiments. In particular, we compute the temperature dependence of the linear conductance G of a system without bulk impurities on the temperature T. The appearance of new temperature scales introduced by the lengths of overhanging parts of the leads and the wire implies a G(T) which is much more complex than the power-law behavior described so far for end-coupled wires. Depending on the precise set-up the wide temperature regime of power-law scaling found in the end-coupled case is broken up into up to five fairly narrow regimes interrupted by extended crossover regions. Our results can be used to optimize the experimental set-ups designed for a verification of Luttinger liquid power-law scaling.

3.
J Phys Condens Matter ; 21(47): 474209, 2009 Nov 25.
Article in English | MEDLINE | ID: mdl-21832488

ABSTRACT

The joint probability distribution in the full counting statistics (FCS) for noninteracting electrons is discussed for an arbitrary number of initially separate subsystems which are connected at t = 0 and separated again at a later time. A simple method to obtain the leading-order long-time contribution to the logarithm of the characteristic function is presented which simplifies earlier approaches. New explicit results for the determinant involving the scattering matrices are found. The joint probability distribution for the charges in two leads is discussed for Y junctions and dots connected to four leads.

4.
J Phys Condens Matter ; 21(49): 495306, 2009 Dec 09.
Article in English | MEDLINE | ID: mdl-21836194

ABSTRACT

Exact numerical results for the full counting statistics (FCS) of a one-dimensional tight-binding model of noninteracting electrons are presented at finite temperatures using an identity recently published by Abanov and Ivanov. A similar idea is used to derive an explicit expression for the cumulant generating function for a system consisting of two quasi-one-dimensional leads connected by a quantum dot in the long-time limit, generalizing the Levitov-Lesovik formula for two single-channel leads to systems with an arbitrary number of transverse channels.

5.
Phys Rev Lett ; 94(13): 136405, 2005 Apr 08.
Article in English | MEDLINE | ID: mdl-15904011

ABSTRACT

We investigate the transport of correlated fermions through a junction of three one-dimensional quantum wires pierced by a magnetic flux. We determine the flow of the conductance as a function of a low-energy cutoff in the entire parameter space. For attractive interactions and generic flux the fixed point with maximal asymmetry of the conductance is the stable one, as conjectured recently. For repulsive interactions and arbitrary flux we find a line of stable fixed points with vanishing conductance as well as stable fixed points with symmetric conductance (4/9)(e(2)/h).

7.
Phys Rev Lett ; 85(24): 5254, 2000 Dec 11.
Article in English | MEDLINE | ID: mdl-11102236
9.
Phys Rev Lett ; 75(13): 2554-2557, 1995 Sep 25.
Article in English | MEDLINE | ID: mdl-10059341
12.
Phys Rev Lett ; 74(23): 4698-4701, 1995 Jun 05.
Article in English | MEDLINE | ID: mdl-10058576
13.
Phys Rev Lett ; 74(15): 2997-3000, 1995 Apr 10.
Article in English | MEDLINE | ID: mdl-10058077
15.
17.
Phys Rev B Condens Matter ; 48(15): 11390-11393, 1993 Oct 15.
Article in English | MEDLINE | ID: mdl-10007454
18.
Phys Rev B Condens Matter ; 48(15): 11521, 1993 Oct 15.
Article in English | MEDLINE | ID: mdl-10007489
20.
Phys Rev B Condens Matter ; 47(24): 16205-16215, 1993 Jun 15.
Article in English | MEDLINE | ID: mdl-10006042
SELECTION OF CITATIONS
SEARCH DETAIL
...