Results 41 to 50 of about 3,301,053 (343)

Quantum phase transitions [PDF]

open access: yesPhilosophical Magazine B, 2001
We give a general introduction to quantum phase transitions in strongly-correlated electron systems. These transitions which occur at zero temperature when a non-thermal parameter $g$ like pressure, chemical composition or magnetic field is tuned to a critical value are characterized by a dynamic exponent $z$ related to the energy and length scales $ $
openaire   +3 more sources

On the Douglas-Kazakov phase transition

open access: yesESAIM: Proceedings and Surveys, 2015
We give a rigorous proof of the fact that a phase transition discovered by Douglas and Kazakov in 1993 in the context of two-dimensional gauge theories occurs. This phase transition can be formulated in terms of the Brownian bridge on
Lévy Thierry, Maïda Mylène
doaj   +1 more source

Quantum Phase Transitions

open access: yes, 2000
These are notes for lectures delivered at the NATO ASI on Dynamics in Leiden, The Netherlands, in July 1998. The main concepts relating to quantum phase transitions are explained, using the paramagnet-to-ferromagnet transition of itinerant electrons as the primary example. Some aspects of metal-insulator transitions are also briefly discussed.
Belitz, D., Kirkpatrick, T. R.
openaire   +2 more sources

Termination of the Berezinskii-Kosterlitz-Thouless phase with a new critical universality in spin-crossover systems

open access: yes, 2015
Two dimensional systems with U(1) symmetry exhibit a peculiar phase, i.e., the Berezinskii-Kosterlitz-Thouless (BKT) phase. In particular situations, the BKT phase exists as an intermediate temperature phase.
Miyashita, Seiji, Nishino, Masamichi
core   +1 more source

Complexity, scaling, and a phase transition

open access: yesJournal of High Energy Physics, 2023
We investigate the holographic complexity of CFTs compactified on a circle with a Wilson line, dual to magnetized solitons in AdS4 and AdS5. These theories have a confinement-deconfinement phase transition as a function of the Wilson line, and the ...
Jiayue Yang, Andrew R. Frey
doaj   +1 more source

Chiral Phase Transitions

open access: yes, 2001
We show that melting the quark mass, the scalar $ $ mass and the quark condensate leads uniquely to the quark-level SU(2) linear $ $ model field theory. Upon thermalization, the chiral phase transition curve requires $T_c =2f^{CL}_ \approx 180 MeV$ when $ = 0$, while the critical chemical potential is $ _c =m_q\approx 325 MeV$.
Scadron, M. D., Zenczykowski, P.
openaire   +3 more sources

PHASE TRANSITIONS IN QCD [PDF]

open access: yesStrong and Electroweak Matter 2000, 2001
19 pages, 14 ...
openaire   +2 more sources

Characterization of topological phase transitions via topological properties of transition points

open access: yes, 2015
We study topological properties of phase transition points of topological quantum phase transitions by assigning a topological invariant defined on a closed circle or surface surrounding the phase transition point in the parameter space of momentum and ...
Chen, Shu, Li, Linhu
core   +1 more source

Unitary Matrix Models and Phase Transition [PDF]

open access: yes, 1997
We study the unitary matrix model with a topological term. We call the topological term the theta term. In the symmetric model there is the phase transition between the strong and weak coupling regime at $\lambda_{c}=2$. If the Wilson term is bigger than
Hisakado, Masato
core   +2 more sources

Phase Transitions in Convection

open access: yesEast European Journal of Physics, 2019
The paper presents the results of the study of the models of convective instability near its threshold of thin layers of liquid and gas bounded by poorly conducting walls.
Ivan V. Gushchin   +2 more
doaj   +1 more source

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