Results 71 to 80 of about 105,946 (302)

Holographic open quantum systems: toy models and analytic properties of thermal correlators

Journal of High Energy Physics, 2023
We present a unified picture of open quantum systems, the theory of a system probing a noisy thermal environment, distilling lessons learnt from previous holographic analyses.
R. Loganayagam, Mukund Rangamani, Julio Virrueta   +2 more
doaj   +1 more source

Hydrodynamics as v s → c

Journal of High Energy Physics
I present the simplest 3+1 dimensional quantum field theory for which the speed of sound can be arbitrarily close to the speed of light. Examining the hydrodynamics, I find cases where the shear viscosity is finite, but the “shear relaxation coefficient”
Guy D. Moore
doaj   +1 more source

Decoherence and dynamical entropy generation in quantum field theory

, 2012
We formulate a novel approach to decoherence based on neglecting observationally inaccessible correlators. We apply our formalism to a renormalised interacting quantum field theoretical model. Using out-of-equilibrium field theory techniques we show that
Prokopec, T., Instituut Theoretische Fysica, Sub Algemeen Theoretical Physics, Schmidt, M.G., Sub String Theory Cosmology and ElemPart, Theoretical Physics, Koksma, J.F.   +6 more
core   +1 more source

Effect of Laser Deoxidation on Adhesive‐Bonded Aluminum in an Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
This study investigates laser ablation of aluminum under oxygen‐free conditions. The goal is to produce oxide‐free substrates that enable improved adhesive bonding with epoxy. Optimized laser parameters (90% overlap, 300 µJ) combined with oxide‐free substrates result in the highest tensile strength of the adhesive bond.
Sandra Gerland, Finn‐Lennard Janthur, Sarah Seffer, Jörg Hermsdorf, Ludger Overmeyer, Annika Raatz   +5 more
wiley   +1 more source

Two-loop HTL-resummed thermodynamics for N $$ \mathcal{N} $$ = 4 supersymmetric Yang-Mills theory

Journal of High Energy Physics, 2020
We compute the two-loop hard-thermal-loop (HTL) resummed thermodynamic potential for N $$ \mathcal{N} $$ = 4 supersymmetric Yang-Mills (SYM). Our final result is manifestly gauge-invariant and was renormalized using only simple vacuum energy, gluon mass,
Qianqian Du, Michael Strickland, Ubaid Tantary, Ben-Wei Zhang   +3 more
doaj   +1 more source

Exact equilibrium distributions in statistical quantum field theory with rotation and acceleration: scalar field

Journal of High Energy Physics, 2021
We derive a general exact form of the phase space distribution function and the thermal expectation values of local operators for the free quantum scalar field at equilibrium with rotation and acceleration in flat space-time without solving field ...
F. Becattini, M. Buzzegoli, A. Palermo
doaj   +1 more source

Combined Process‐ and Phase‐Field‐Simulation to Predict the Microstructure of Single‐Crystal Ni‐Based Superalloys

Advanced Engineering Materials, EarlyView.
A combined finite element and phase‐field approach predicts the evolution of microstructure during the directional solidification of Ni‐based superalloys. The model reveals how withdrawal rate, temperature gradient, and wall thickness control the dendrite spacing, highlighting the strong effect of surface regions in thin sections where dendrite growth ...
Sean Böhm, André B. Baldissera, Rainer Völkl, Uwe Glatzel   +3 more
wiley   +1 more source

Al–Cu Composite Casting of Laser‐Deoxidized Copper: Bonding, Interfacial Chemistry, and Thermal Conductivity

Advanced Engineering Materials, EarlyView.
This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff, Finn‐Lennard Janthur, Sascha Zimmermann, Sarah Seffer, Jörg Hermsdorf, René Gustus, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Christian Klose   +9 more
wiley   +1 more source

Eigenstate thermalization hypothesis in conformal field theory [PDF]

Journal of Statistical Mechanics: Theory and Experiment, 2018
8 Pages, 3 ...
Lashkari, Nima, Dymarsky, Anatoly, Liu, Hong   +2 more
openaire   +4 more sources

Color confinement and random matrices. A random walk down group manifold toward Casimir scaling

Journal of High Energy Physics
We explain the microscopic origin of linear confinement potential with the Casimir scaling in generic confining gauge theories. In the low-temperature regime of confining gauge theories such as QCD, Polyakov lines are slowly varying Haar random modulo ...
Georg Bergner, Vaibhav Gautam, Masanori Hanada   +2 more
doaj   +1 more source