Results 41 to 50 of about 129,686 (122)

Self-Consistent-Field Method and τ-Functional Method on Group Manifold in Soliton Theory: a Review and New Results

Symmetry, Integrability and Geometry: Methods and Applications, 2009
The maximally-decoupled method has been considered as a theory to apply an basic idea of an integrability condition to certain multiple parametrized symmetries.
Seiya Nishiyama, João da Providência, Constança Providência, Flávio Cordeiro, Takao Komatsu   +4 more
doaj   +1 more source

Semiclassical approximations for Hamiltonians with operator-valued symbols

, 2012
We consider the semiclassical limit of quantum systems with a Hamiltonian given by the Weyl quantization of an operator valued symbol. Systems composed of slow and fast degrees of freedom are of this form.
A.N. Kaufman, B. Helffer, B. Simon, C. Emmrich, C. Fermanian-Kammerer, C. Lasser, C. Rondeaux, D. Xiao, D. Xiao, G. De Nittis, G. Nenciu, G. Panati, H. Kuratsuji, H. Kuratsuji, Hans-Michael Stiepan, I.B. Bernstein, J. Bellissard, J. Bolte, J. Bolte, M.-C. Chang, M.V. Berry, O. Gat, P. Gosselin, R.G. Littlejohn, R.G. Littlejohn, S. Iida, S. Teufel, Stefan Teufel, T. Duyckaerts, T. Fukui   +29 more
core   +1 more source

On the Existence of Localized Excitations in Nonlinear Hamiltonian Lattices

, 1994
We consider time-periodic nonlinear localized excitations (NLEs) on one-dimensional translationally invariant Hamiltonian lattices with arbitrary finite interaction range and arbitrary finite number of degrees of freedom per unit cell.
A. J. Lichtenberg, A. J. Sievers, D. K. Campbell, F. Fischer, J. B. Page, J. Denzler, K. W. Sandusky, M. J. Ablowitz, S. A. Kisilev, S. Aubry, S. Flach, S. Flach, S. Flach, S. Flach, S. Flach, S. Takeno, V. M. Eleonskii, Yu. S. Kivshar   +17 more
core   +1 more source

Weak Massive Gravity

, 2013
We find a new class of theories of massive gravity with five propagating degrees of freedom where only rotations are preserved. Our results are based on a non-perturbative and background-independent Hamiltonian analysis.
Comelli, Denis, Nesti, Fabrizio, Pilo, Luigi   +2 more
core   +1 more source

Crossover Phenomena in the One-Dimensional SU(4) Spin-Orbit Model under Magnetic Fields

, 1999
We study the one-dimensional SU(4) exchange model under magnetic fields, which is the simplest effective Hamiltonian in order to investigate the quantum fluctuations concerned with the orbital degrees of freedom in coupled spin-orbit systems.
B. Frischmuth, B. Sutherland, D. Dender, I. Affleck, J. M. Effantin, K. I. Kugel, Kazuo Ueda, N. Kawakami, Naokazu Shibata, P. Azaria, S. Inagaki, S. Kondo, S. Pati, S. R White, S. R White, T. Itakura, Y. Q. Li, Y. Q. Li, Y. Yamashita, Yasufumi Yamashita   +19 more
core   +1 more source

Statistical Equilibrium in Quantum Gravity: Gibbs states in Group Field Theory

, 2018
Gibbs states are known to play a crucial role in the statistical description of a system with a large number of degrees of freedom. They are expected to be vital also in a quantum gravitational system with many underlying fundamental discrete degrees of ...
Kotecha, Isha, Oriti, Daniele
core   +1 more source

Unconstrained Hamiltonian Formulation of SU(2) Gluodynamics

, 1999
SU(2) Yang-Mills field theory is considered in the framework of the generalized Hamiltonian approach and the equivalent unconstrained system is obtained using the method of Hamiltonian reduction. A canonical transformation to a set of adapted coordinates
A. Bohr, A. Das, A.A. Belavin, A.G. Izergin, A.M. Khvedelidze, D. Blaschke, D. Martin, D.M. Brink, E.T. Newman, H. Loos, H. Nachbagauer, I.I. Kogan, J. Goldstone, K. Haller, L. Faddeev, L.D. Faddeev, L.V. Prokhorov and, M. Bauer, M. Creutz, M. Henneaux, M. Lavelle, M. Lüscher, M. Marcus, N.H. Christ, P.A.M. Dirac, P.E. Haagensen, R. Jackiw, R. Schiappa, S. Deser, S. Shanmugadhasan, S.A. Gogilidze, S.A. Gogilidze, S.A. Gogilidze, V. Baluni, V.N. Pervushin, V.V. Vlasov, Yu. Simonov   +36 more
core   +1 more source

Darboux points and integrability of homogeneous Hamiltonian systems with three and more degrees of freedom

, 2009
We consider natural complex Hamiltonian systems with $n$ degrees of freedom given by a Hamiltonian function which is a sum of the standard kinetic energy and a homogeneous polynomial potential $V$ of degree $k>2$.
A. Guillot, A. J. Maciejewski, A. J. Maciejewski, A. K. Tsikh, A. Koz’owski, D. Cox, D. Cox, G. Biernat, G. Biernat, G. Biernat, H. A. Schwarz, H. Yoshida, H. Yoshida, I.A. Aĭzenberg, I.R. Shafarevich, J. Hietarinta, J. Hietarinta, J. J. Morales Ruiz, J. J. Morales Ruiz, J. J. Morales Ruiz, J. J. Morales Ruiz, J. J. Morales Ruiz, J. J. Morales Ruiz, K. Nakagawa, M. Audin, M. Przybylska, M. Przybylska, M.A. Almeida, P. Griffiths, P.A. Griffiths, P.F. Baum, S. L. Ziglin, S. L. Ziglin, T. Kimura   +33 more
core   +2 more sources

A Monte Carlo Method for Fermion Systems Coupled with Classical Degrees of Freedom

, 2000
A new Monte Carlo method is proposed for fermion systems interacting with classical degrees of freedom. To obtain a weight for each Monte Carlo sample with a fixed configuration of classical variables, the moment expansion of the density of states by ...
Dagotto E., Furukawa N., Furukawa N., Silver R. N., Wang L. W., Yunoki S., Yunoki S., Zener C.   +7 more
core   +1 more source

Ellipsoids of U(3) model

, 2009
The Cartan model of SO(3)/SO(2) matrices is applied to reduce of rotational degrees of freedom on coadjoint orbits of u^*(3) Poisson algebra. The seven--dimensional Poisson algebra u_SO(3) obtained by SO(3) reduction of u^*(3) algebra is found and ...
Cerkaski, Marcin
core   +1 more source