Results 171 to 180 of about 326,761 (366)

Quantum Probability, Renormalization and Infinite-Dimensional *-Lie Algebras

Symmetry, Integrability and Geometry: Methods and Applications, 2009
The present paper reviews some intriguing connections which link together a new renormalization technique, the theory of *-representations of infinite dimensional *-Lie algebras, quantum probability, white noise and stochastic calculus and the theory of ...
Luigi Accardi, Andreas Boukas
doaj   +1 more source

A new exactly solvable spatially one-dimensional quantum superradiance fermi-medium model and properties of its quantum solitonic states

Condensed Matter Physics, 2013
A new exactly solvable spatially one-dimensional quantum superradiance model describing a charged fermionic medium interacting with external electromagnetic field is proposed.
D. Blackmore, A. Prykarpatsky
doaj   +1 more source

The ab-initio density matrix renormalization group in practice.

Journal of Chemical Physics, 2015
The ab-initio density matrix renormalization group (DMRG) is a tool that can be applied to a wide variety of interesting problems in quantum chemistry.
R. Olivares-Amaya, Weifeng Hu, N. Nakatani, Sandeep Sharma, J. Yang, G. Chan   +5 more
semanticscholar   +1 more source

Stochastic Hydrodynamic Velocity Field and the Representation of Langevin Equations

Annalen der Physik, EarlyView.
A lumped method is proposed to account for both mean‐field hydrodynamics and stochastic fluctuations within the kinematic equations of motion, providing a regularized formulation of the overdamped approximation. The concept of stochastic realizability in broad sense is introduced based on the spectral properties of the Fredholm operator associated with
Massimiliano Giona, Davide Cocco, Giuseppe Procopio   +2 more
wiley   +1 more source

Fate of surface gaps in magnetic topological insulators

JPhys Materials
In magnetic topological insulators, the surface states can exhibit a gap due to the breaking of time-reversal symmetry. Various experiments, while suggesting the existence of the surface gap, have raised questions about its underlying mechanism in the ...
Habib Rostami, Ali G Moghaddam
doaj   +1 more source

A Mathematical Model of a Novel 3D Fractal-Inspired Piezoelectric Ultrasonic Transducer

Sensors, 2016
Piezoelectric ultrasonic transducers have the potential to operate as both a sensor and as an actuator of ultrasonic waves. Currently, manufactured transducers operate effectively over narrow bandwidths as a result of their regular structures which ...
Sara Canning, Alan J. Walker, Paul A. Roach   +2 more
doaj   +1 more source

An improved $\eps$ expansion for three-dimensional turbulence: two-loop renormalization near two dimensions

, 2004
An improved $\eps$ expansion in the $d$-dimensional ($d > 2$) stochastic theory of turbulence is constructed at two-loop order which incorporates the effect of pole singularities at $d \to 2$ in coefficients of the $\eps$ expansion of universal ...
A. N. Vasil’ev, A. N. Vasil’ev, A. S. Monin, E. R. Speer, J-D. Fournier, J. C. Collins, J. Honkonen, J. Zinn-Justin, L. Ts. Adzhemyan, L. Ts. Adzhemyan, L. Ts. Adzhemyan, L. Ts. Adzhemyan, L. Ts. Adzhemyan, L. Ts. Adzhemyan, M. V. Kompaniets, U. Frisch   +15 more
core   +1 more source

Renormalization of the Hutchinson Operator [PDF]

Symmetry, Integrability and Geometry: Methods and Applications, 2018
One of the easiest and common ways of generating fractal sets in ${\mathbb R}^D$ is as attractors of affine iterated function systems (IFS). The classic theory of IFS's requires that they are made with contractive functions. In this paper, we relax this hypothesis considering a new operator $H_ $ obtained by renormalizing the usual Hutchinson operator
openaire   +4 more sources

A review of Phillips‐type right‐tailed unit root bubble detection tests

Journal of Economic Surveys, Volume 37, Issue 1, Page 141-158, February 2023., 2023
Abstract Recent developments on the right‐tailed unit root tests of Phillips et al., which are used to date stamp the origination and collapse dates of asset price bubbles, have generated considerable interest. This paper provides a review for both empirical researchers that adopt these new econometric tools to detect the presence of asset price ...
Yang Hu
wiley   +1 more source

Discretisations, Constraints and Diffeomorphisms in Quantum Gravity

Symmetry, Integrability and Geometry: Methods and Applications, 2012
In this review we discuss the interplay between discretization, constraint implementation, and diffeomorphism symmetry in Loop Quantum Gravity and Spin Foam models. To this end we review the Consistent Discretizations approach, which is an application of
Benjamin Bahr, Rodolfo Gambini, Jorge Pullin   +2 more
doaj   +1 more source