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Contents Ann. Phys. 92010

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Ann. Phys. (Berlin) 522, No. 9, 613 – 614 (2010) / DOI 10.1002/andp.201052209
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Page 615 – 656
Sebastian Diehl, Stefan Floerchinger, Holger Gies, Jan Martin Pawlowski, and
Christof Wetterich
Functional renormalization group approach to the BCS-BEC
theory space
T= μ = 0
The phase transition to superfluidity and the BCSUV
BEC crossover for an ultracold gas of fermionic
atoms is discussed within a functional renormalizaT, μ =/ 0
tion group approach. Non-perturbative flow equaIR
tions, based on an exact renormalization group
equation, describe the scale dependence of the
flowing or average action. They interpolate continuously from the microphysics at atomic or molecular distance scales to the
macroscopic physics at much larger length scales, as given by the interparticle distance, the correlation length, or the size of the experimental probe. The
authors discuss the phase diagram as a function of the scattering length and
the temperature and compute the gap, the correlation length and the scattering
length for molecules. . . .
Page 657 – 678
Alexander Branschädel, Guenter Schneider, and Peter Schmitteckert
Conductance of inhomogeneous systems: Real-time dynamics
Numerical time evolution of
transport states using time dependent Density Matrix Renormalization Group (td-DMRG)
methods has turned out to be a
powerful tool to calculate the
linear and finite bias conductance of interacting impurity systems coupled to non-interacting
one-dimensional leads. Several
models, including the Interacting Resonant Level Model (IRLM), the Single Impurity Anderson Model
(SIAM), as well as models with different multi site structures, have been subject of investigations in this context. In this work the authors give an overview
of the different numerical approaches that have been successfully applied
to the problem and go into considerable detail when they comment on the
techniques that have been used to obtain the full I–V-characteristics for the
IRLM.. . .
© 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Page 679 – 690
Viktor Eisler and Ingo Peschel
Entanglement in fermionic chains with interface defects
The authors study the groundstate entanglement of two halves
of a critical transverse Ising
chain, separated by an interface
defect. From the relation to a
two-dimensional Ising model
with a defect line we obtain an
exact expression for the continuously varying effective central charge which governs the
asymptotic behaviour of the entanglement entropy. The result is
relevant also for other fermionic
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© 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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