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67,484
Revisiting Thouless conductance formula
, 1995
"... It was shown using perturbation theory[1] that Thouless energy Ec for a quantum system scales linearly with the conductance of the system. We derive in an alternate way in 1D that Ec scales with the conductance in a very different way. We physically show the difference between our approach and that ..."
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It was shown using perturbation theory[1] that Thouless energy Ec for a quantum system scales linearly with the conductance of the system. We derive in an alternate way in 1D that Ec scales with the conductance in a very different way. We physically show the difference between our approach
Spectral scrambling in Coulombblockade quantum dots
, 2001
"... We estimate the fluctuation width of an energy level as a function of the number of electrons added to a Coulombblockade quantum dot. A microscopic calculation in the limit of Koopmans ’ theorem predicts that the standard deviation of these fluctuations is linear in the number of added electrons, i ..."
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, in agreement with a parametric randommatrix approach. We estimate the number of electrons it takes to scramble the spectrum completely in terms of the interaction strength, the dimensionless Thouless conductance, and the symmetry class.
THOULESS NUMBER AND SPIN DIFFUSION IN QUANTUM HEISENBERG FERROMAGNETS
, 1993
"... Using an analogy between the conductivity tensor of electronic systems and the spin stiffness tensor of spin systems, we introduce the concept of the Thouless number g0 and the dimensionless frequency dependent conductance g(ω) for quantum spin models. It is shown that spin diffusion implies the van ..."
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Using an analogy between the conductivity tensor of electronic systems and the spin stiffness tensor of spin systems, we introduce the concept of the Thouless number g0 and the dimensionless frequency dependent conductance g(ω) for quantum spin models. It is shown that spin diffusion implies
Landauer and Thouless Conductance: a Band Random Matrix Approach
"... We numerically analyze the transmission through a thin disordered wire of finite length attached to perfect leads, by making use of banded random Hamiltonian matrices. We compare the Landauer and the Thouless conductances, and find that they are proportional to each other in the diffusive regime ..."
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We numerically analyze the transmission through a thin disordered wire of finite length attached to perfect leads, by making use of banded random Hamiltonian matrices. We compare the Landauer and the Thouless conductances, and find that they are proportional to each other in the diffusive
Landauer and Thouless Conductance: a Band Random Matrix Approach
, 1997
"... We numerically analyze the transmission through a thin disordered wire of finite length attached to perfect leads, by making use of banded random Hamiltonian matrices. We compare the Landauer and the Thouless conductances, and find that they are proportional to each other in the diffusive regime, wh ..."
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We numerically analyze the transmission through a thin disordered wire of finite length attached to perfect leads, by making use of banded random Hamiltonian matrices. We compare the Landauer and the Thouless conductances, and find that they are proportional to each other in the diffusive regime
Level Curvatures and Conductances: A Numerical Study of the Thouless Relation
, 1996
"... The Thouless conjecture states that the average conductance of a disordered metallic sample in the diffusive regime can be related to the sensitivity of the sample’s spectrum to a change in the boundary conditions. Here we present results of a direct numerical study of the conjecture for the Anderso ..."
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The Thouless conjecture states that the average conductance of a disordered metallic sample in the diffusive regime can be related to the sensitivity of the sample’s spectrum to a change in the boundary conditions. Here we present results of a direct numerical study of the conjecture
THE THOULESS CONJECTURE FOR A ONEDIMENSIONAL CHAIN
"... r ', " Equation (13) of this paper does not follow..,t from (12). The correct Equation (13) is: " O1 2 e +cosI (Irl cos) " "' The remainder of the paper is completely unaffected. ..."
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r ', " Equation (13) of this paper does not follow..,t from (12). The correct Equation (13) is: " O1 2 e +cosI (Irl cos) " "' The remainder of the paper is completely unaffected.
The KosterlitzThouless universality class
 Nucl. Phys. B
, 1997
"... We examine the Kosterlitz–Thouless universality class and show that conventional (essential) scaling at this type of phase transition is self–consistent only if modified by multiplicative logarithmic corrections. In the case of specific heat these logarithmic corrections are identified analytically. ..."
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We examine the Kosterlitz–Thouless universality class and show that conventional (essential) scaling at this type of phase transition is self–consistent only if modified by multiplicative logarithmic corrections. In the case of specific heat these logarithmic corrections are identified analytically
Dynamics of the 2D twocomponent plasma near the KosterlitzThouless transition
, 1999
"... Abstract. We study the dynamics of a classical, twocomponent plasma in two dimensions, in the vicinity of the KosterlitzThouless (KT) transition where the system passes from a dielectric lowtemperature phase (consisting of bound pairs) to a conducting phase. We use two “complementary” analytical a ..."
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Abstract. We study the dynamics of a classical, twocomponent plasma in two dimensions, in the vicinity of the KosterlitzThouless (KT) transition where the system passes from a dielectric lowtemperature phase (consisting of bound pairs) to a conducting phase. We use two “complementary” analytical
Results 1  10
of
67,484