Results 91 to 100 of about 802,166 (283)

Nonequilibrium functional renormalization group for interacting quantum systems [PDF]

, 2007
We propose a nonequilibrium version of functional renormalization within the Keldysh formalism by introducing a complex valued flow parameter in the Fermi or Bose functions of each reservoir.
Herbert Schoeller, M. Salmhofer, Severin G. Jakobs, V. Meden, Volker Meden   +4 more
core   +1 more source

Introduction to the Functional Renormalization Group [PDF]

, 2010
I Foundations of the renormalization group.- Phase Transitions and the Scaling Hypothesis.- Mean-Field Theory and the Gaussian Approximation.- Wilsonian Renormalization Group.- Critical Behavior of the Ising Model Close to Four Dimensions.- Field-Theoretical Renormalization Group.- II Introduction to the functional renormalization group.- Functional ...
Florian Schütz, Lorenz Bartosch, Peter Kopietz   +2 more
openaire   +2 more sources

Optical Control of the Thermal Conductivity in BaTiO3

Advanced Functional Materials, EarlyView.
Light‐driven manipulation of thermal conductivity in archetypal ferroelectric, BaTiO3, offers a novel and effective approach for the dynamical control of the heat flux, with potential applications in thermal management and phonon‐based logic. Abstract Achieving dynamic control over thermal conductivity remains a formidable challenge in condensed matter
Claudio Cazorla, Carlos Escorihuela‐Sayalero, Jesús Carrete, Jorge Íñiguez‐González, Riccardo Rurali   +4 more
wiley   +1 more source

Superfluidity in multicomponent fermions via the functional renormalization group

Nuclear Physics B, 2023
We reveal the critical properties of the phase transition towards superfluid order that has been proposed to occur in large spin fermionic systems. For this purpose, we consider the bosonic field theory for fluctuations of the complex skew-symmetric rank-
Michal Hnatič, Georgii Kalagov
doaj  

Functional renormalization group for fermion lattice models in three dimensions: Application to the Hubbard model on the cubic lattice [PDF]

Physical review B, 2020
The channel-decomposed functional renormalization group (FRG) approach, most recently presented in the variant of truncated-unity FRG (TUFRG), has so far been used for various two-dimensional model systems.
J. Ehrlich, C. Honerkamp
semanticscholar   +1 more source

Efimov physics from the functional renormalization group

, 2011
Few-body physics related to the Efimov effect is discussed using the functional renormalization group method. After a short review of renormalization in its modern formulation we apply this formalism to the description of scattering and bound states in ...
A. Rapp, A. Rapp, A.N. Wenz, B. Krippa, B.J. Schaefer, C. Bagnuls, C. Wetterich, D.S. Petrov, E. Braaten, E. Braaten, F. Ferlaino, F. Wilczek, G.V. Skorniakov, G.V. Skorniakov, H. Gies, H. Gies, H.W. Hammer, I. Bloch, J. Berges, J. Polonyi, J.H. Huckans, J.M. Pawlowski, J.R. Williams, K. Aoki, L. Bartosch, M. Bartenstein, M. Salmhofer, M.C. Birse, M.C. Birse, P. Naidon, P.F. Bedaque, R. Schmidt, Richard Schmidt, S. Diehl, S. Diehl, S. Diehl, S. Diehl, S. Diehl, S. Diehl, S. Floerchinger, S. Floerchinger, S. Floerchinger, S. Floerchinger, S. Floerchinger, S. Floerchinger, S. Giorgini, S. Moroz, S.J.J.M.F. Kokkelmans, Sergej Moroz, Stefan Floerchinger, T. Lompe, T. Lompe, T.B. Ottenstein, T.R. Morris, V. Efimov, V. Efimov   +55 more
core   +1 more source

Renormalization group invariant average momentum of non-singlet parton densities [PDF]

, 1999
We compute, within the Schr\"odinger functional scheme, a renormalization group invariant renormalization constant for the first moment of the non-singlet parton distribution function.
Guagnelli, Jansen, Karl Jansen, Lüscher, Lüscher, Lüscher, Marco Guagnelli, Roberto Petronzio, Sint, Sommer   +9 more
core   +2 more sources

Alternative flow equation for the functional renormalization group [PDF]

Physical Review D, 2019
We derive an alternative to the Wetterich-Morris-Ellwanger equation by means of the two-particle irreducible (2PI) effective action, exploiting the method of external sources due to Garbrecht and Millington. The latter allows the two-point source of the 2PI effective action to be associated consistently with the regulator of the renormalization group ...
Elizabeth Alexander, Peter Millington, Jordan Nursey, Paul M. Saffin   +3 more
openaire   +4 more sources

1D Light‐Emitting MAPbBr3 Perovskite Encapsulated in Carbon Nanotubes

Advanced Functional Materials, EarlyView.
Encapsulation of MAPbBr3 perovskite in single‐walled carbon nanotubes (SWCNTs) yields a hybrid nanomaterial with distinctive optoelectronic properties. Perovskite confinement induces a unified single‐peak photoluminescence (PL) with a reduced lifetime, while charge transfer alters the optical properties of nanotubes.
Valentina A. Eremina, Timofei Eremin, Hua Jiang, Rakesh Dhama, Jokotadeola Odutola, Humeyra Caglayan, Nikolai V. Tkachenko, Petr A. Obraztsov   +7 more
wiley   +1 more source

Functional renormalization group and conformal invariance in cold atoms

EPJ Web of Conferences, 2010
We present an application of a field-theoretic functional renormalization group technique to fewbody (vacuum) physics of nonrelativistic atoms near a Feshbach resonance.
Moroz S.
doaj   +1 more source