Results 61 to 70 of about 129,282 (240)

Effective Hamiltonian for Excitons with Spin Degrees of Freedom

, 1998
Starting from the conventional electron-hole Hamiltonian ${\cal H}_{eh}$, we derive an effective Hamiltonian $\tilde{\cal H}_{1s}$ for $1s$ excitons with spin degrees of freedom.
Axt V. M., Bott K., Haldane F. D. M., Hanamura E., Haug H., Haug H., Hawton M., Hu Y. Z., Ivanov A. L., Kopietz P., Kuwata-Gonokami M., Lindberg M., Rappen T., Schmitt-Rink S., Schäfer W., Stone M.   +15 more
core   +2 more sources

Euler-Calogero-Moser system from SU(2) Yang-Mills theory [PDF]

, 2000
The relation between SU(2) Yang-Mills mechanics, originated from the 4-dimensional SU(2) Yang-Mills theory under the supposition of spatial homogeneity of the gauge fields, and the Euler-Calogero-Moser model is discussed in the framework of Hamiltonian ...
A. Gorsky, A. Mironov, A. Niemi, A.M. Perelomov, A.P. Polychronakos, A.P. Polychronakos, A.P. Polychronakos, A.P. Polychronakos, A.V. Marshakov, B. Dahmen, B. Sutherland, B. Sutherland, B.S. Shastry, E. D’Hoker, E. D’Hoker, E. D’Hoker, E. D’Hoker, E. Langmann, E. Langmann, E. Martinec, F. Calogero, F. Calogero, F. Calogero, F. Calogero, F. Calogero, F.D.M. Haldane, G.W. Gibbons, H.M. Asatryan, I.M. Krichever, I.M. Krichever, J. Blom, J. Gibbons, J. Moser, J.A. Minahan, L. Brink, M. Henneaux, M. J. Gotay, M. Kuś, M.A. Olshanetsky, M.A. Olshanetsky, M.A. Soloviev, M.A. Vasiliev, M.A. Vasiliev, M.A. Vasiliev, N. Kawakami, N. Seiberg, N. Seiberg, N. Seiberg, O. Azuma, O. Babelon, P.A.M. Dirac, R. Donagi, S. Wojciechowski, S.A. Gogilidze, S.E. Konstein, S.G. Matinyan   +55 more
core   +2 more sources

Realization of a Bilayer Elastic Topological Insulator

Advanced Science, EarlyView.
Bilayer elastic wave topological insulators are experimentally realized, introducing the layer degree of freedom to access four topological phases. This enables diverse domain walls and transmission behaviors, including interlayer conversion and beam splitting.
Chengzhi Ma, Zhiwei Song, Zheyu Cheng, Jiu Hui Wu, Baile Zhang   +4 more
wiley   +1 more source

Classifying Two-Body Hamiltonians for Quantum Darwinism

Physical Review X
Quantum Darwinism is a paradigm to understand how classically objective reality emerges from within a fundamentally quantum universe. Despite the growing attention that this field of research has been enjoying, it is currently not known what specific ...
Emery Doucet, Sebastian Deffner
doaj   +1 more source

Toppling Pencils—Macroscopic Randomness from Microscopic Fluctuations

Entropy, 2020
We construct a microscopic model to study discrete randomness in bistable systems coupled to an environment comprising many degrees of freedom. A quartic double well is bilinearly coupled to a finite number N of harmonic oscillators.
Thomas Dittrich, Santiago Peña Martínez   +1 more
doaj   +1 more source

Normal forms and uniform approximations for bridge orbit bifurcations

, 2008
We discuss various bifurcation problems in which two isolated periodic orbits exchange periodic ``bridge'' orbit(s) between two successive bifurcations. We propose normal forms which locally describe the corresponding fixed point scenarios on the Poincar\
Arita, Ken-ichiro, Brack, Matthias
core   +1 more source

Beyond the Non‐Hermitian Skin Effect: Scaling‐Controlled Topology from Exceptional‐Bound Bands

Advanced Science, EarlyView.
ABSTRACT We establish a novel mechanism for topological transitions in non‐Hermitian systems that are controlled by the system size. Based on a new paradigm known as exceptional‐bound (EB) band engineering, its mechanism hinges on the unique critical scaling behavior near an exceptional point, totally unrelated to the well‐known non‐Hermitian skin ...
Mengjie Yang, Ching Hua Lee
wiley   +1 more source

Null dust in canonical gravity

, 1997
We present the Lagrangian and Hamiltonian framework which incorporates null dust as a source into canonical gravity. Null dust is a generalized Lagrangian system which is described by six Clebsch potentials of its four-velocity Pfaff form. The Dirac--ADM
A. Peres, B. F. Schutz, B. Schutz, C. A. Burnett, C. Carathéodory, C. W. Misner, C. W. Misner, C. W. Misner, D. A. Konkowski, D. Kramer, D. Kramer, E. Herlt, E. Poisson, F. A. E. Pirani, F. Markopoulou, G. Y. Rainich, H. Bondi, I. H. Dwivedi, I. Robinson, I. Robinson, J. B. Griffiths, J. B. Griffiths, J. Bičák, J. Bičák, J. D. Brown, J. D. Brown, J. D. Brown, J. D. Brown, J. Krishna Rao, J. Kristian, J. S. Lemos, J. Serrin, Jiřı ´ Bičák, K. P. Singh, K. Tam, K. Tam, K. V. Kuchař, K. V. Kuchař, K. V. Kuchař, K. V. Kuchař, Karel V. Kuchař, M. A. H. MacCallum, M. Halilsoy, P. C. Vaidya, P. C. Vaidya, P. C. Vaidya, P. R. Holvorcem, P. S. Letelier, R Balbinot, R. A. Isaacson, R. L. Seliger, R. Parentani, R. Penrose, R. Sachs, S. Chandrasekhar, V. Hlavatý, W. B. Bonnor, W. Israel, W. Z. Chao, Y. Choquet-Bruhat, Y. Choquet-Bruhat, Y. Kuroda   +61 more
core   +1 more source

Topological Materials and Related Applications

Advanced Electronic Materials, EarlyView.
This review covers topological materials—including topological insulators, quantum valley Hall and quantum spin Hall insulators, and topological Weyl and Dirac semimetals—as well as their most recent advancements in fields such as spintronics, electronics, photonics, thermoelectrics, and catalysis.
Carlo Grazianetti, Roberto Mantovan, Emanuele Longo, Harold J. W. Zandvliet, Pantelis Bampoulis, Yu Pan, Fan Li, Xia Wang, Payton Downey, Alessandro Molle   +9 more
wiley   +1 more source

On the accuracy of conservation of adiabatic invariants in slow-fast systems

, 2011
Let the adiabatic invariant of action variable in slow-fast Hamiltonian system with two degrees of freedom have two limiting values along the trajectories as time tends to infinity. The difference of two limits is exponentially small in analytic systems.
A. I. Neishtadt, A. I. Neishtadt, D.V. Treschev, G. Benettin, J.W. Brown, Tan Su, V. I. Arnold, V. I. Arnold   +7 more
core   +1 more source