Results 81 to 90 of about 802,166 (283)

Functional renormalization group approach for signal detection

SciPost Physics Core
This review paper utilizes renormalization group techniques for signal detection in nearly continuous positive spectra. We emphasize the universal aspects of the analogue field-theory approach.
Vincent Lahoche, Dine Ousmane Samary, Mohamed Tamaazousti
doaj   +1 more source

Functional renormalization group approach to color superconducting phase transition

Journal of High Energy Physics, 2019
We investigate the order of the color superconducting phase transition using the functional renormalization group approach. We analyze the Ginzburg-Landau effective theory of color superconductivity and more generic scalar SU(N c) gauge theories by ...
Gergely Fejős, Naoki Yamamoto
doaj   +1 more source

Functional renormalization group study of the critical region of the quark-meson model with vector interactions [PDF]

The European Physical Journal C, 2020
The critical region of the two flavour quark-meson model with vector interactions is explored using the Functional Renormalization Group, a non-perturbative method that takes into account quantum and thermal fluctuations.
R. C. Pereira, Rainer Stiele, Pedro Costa   +2 more
semanticscholar   +1 more source

Creep via dynamical functional renormalization group

, 1998
We study a D-dimensional interface driven in a disordered medium. We derive finite temperature and velocity functional renormalization group (FRG) equations, valid in a 4-D expansion.
Balents L., Chauve P., Feigelman M., Fisher D. S., Ioffe L. B., Larkin A. I., Le Doussal P., Lenormand R., Mikheev L. V., Nattermann T., P Chauve, P. Le Doussal, T Giamarchi, Tang L. H.   +13 more
core   +1 more source

Why the Cosmological Constant Seems to Hardly Care About Quantum Vacuum Fluctuations: Surprises From Background Independent Coarse Graining

Frontiers in Physics, 2020
Background Independence is a sine qua non for every satisfactory theory of Quantum Gravity. If one tries to establish a corresponding notion of Wilsonian renormalization, or coarse graining, it presents a major conceptual and technical difficulty usually.
Carlo Pagani, Martin Reuter
doaj   +1 more source

Accessing the ordered phase of correlated Fermi systems: Vertex bosonization and mean-field theory within the functional renormalization group [PDF]

Physical review B, 2020
We present a consistent fusion of functional renormalization group and mean-field theory which explicitly introduces a bosonic field via a Hubbard-Stratonovich transformation at the critical scale, at which the order sets in.
P. Bonetti
semanticscholar   +1 more source

Functional renormalization group for quantized anharmonic oscillator

, 2010
Functional renormalization group methods formulated in the real-time formalism are applied to the $O(N)$ symmetric quantum anharmonic oscillator, considered as a $0+1$ dimensional quantum field-theoric model, in the next-to-leading order of the gradient ...
Nagy, S., Sailer, K.
core   +1 more source

Functional renormalization group approach to correlated fermion systems [PDF]

, 2012
Numerous correlated electron systems exhibit a strongly scale-dependent behavior. Upon lowering the energy scale, collective phenomena, bound states, and new effective degrees of freedom emerge.
Abrikosov, A., Anderson, P. W., Anisimov, V., Binz, B., Carsten Honerkamp, Dzyaloshinskii, I. E., Dzyaloshinskii, I. E., Feldman, J., Feldman, J., Feldman, J., Feldman, J., Fradkin, E., Fulde, P., Giamarchi, T., Honerkamp, C., Kamenev, A., Kehrein, S., Kopietz, P., Kurt Schönhammer, Manfred Salmhofer, Negele, J. W., Nozières, P., Polchinski, J., Pomeranchuk, I. J., Popov, V. N., Reed, M., Sachdev, S., Salmhofer, M., Schoeller, H., Schönhammer, K., Taylor, J. R., Tsai, S. W., Volker Meden, Walter Metzner   +33 more
core   +1 more source

Quantitative functional renormalization for three-dimensional quantum Heisenberg models

SciPost Physics, 2022
We employ a recently developed variant of the functional renormalization group method for spin systems, the so-called pseudo Majorana functional renormalization group, to investigate three-dimensional spin-1/2 Heisenberg models at finite temperatures. We
Nils Niggemann, Johannes Reuther, Björn Sbierski
doaj   +1 more source

Emergence of charge loop current in the geometrically frustrated Hubbard model: A functional renormalization group study [PDF]

Physical review B, 2020
Spontaneous current orders due to odd-parity order parameters attract increasing attention in various strongly correlated metals. Here, we discover a novel spin-fluctuation-driven charge loop current (cLC) mechanism based on the functional ...
R. Tazai, Y. Yamakawa, H. Kontani
semanticscholar   +1 more source