Results 31 to 40 of about 418,083 (279)

A Lax Equation for the Non-Linear Sigma Model [PDF]

, 2002
We propose a Lax equation for the non-linear sigma model which leads directly to the conserved local charges of the system. We show that the system has two infinite sets of such conserved charges following from the Lax equation, much like dispersionless ...
A Constandache, Abdalla, Abdalla, Arik, Ashok Das, Barcelos-Neto, Brunelli, Brunelli, Brunelli, Brézin, Błaszak, Cavalcante, Constandache, Curtright, Das, Das, Dubrovin, Evans, Faddeev, Goldschmidt, Gürses, J.C Brunelli, Lüscher, Mackay, Mackay, Magri, Manin, Nutku, Okubo, Olver, Olver, Pohlmeyer, Whitham, Zakharov, Zakharov, Zakrzewski, Zamolodchikov   +36 more
core   +2 more sources

Exact PT-Symmetry Is Equivalent to Hermiticity [PDF]

, 2003
We show that a quantum system possessing an exact antilinear symmetry, in particular PT-symmetry, is equivalent to a quantum system having a Hermitian Hamiltonian.
Ali Mostafazadeh, Bender C M, Bender C M, Bender C M, Bender C M, Bender C M, Kato T, Mostafazadeh A, Mostafazadeh A, Mostafazadeh A, Mostafazadeh A, Scholtz F G, Scolarici G, Scolarici G, Scolarici G, Weinberg S, Znojil M   +16 more
core   +2 more sources

Identifying an Experimental Two-State Hamiltonian to Arbitrary Accuracy [PDF]

, 2005
Precision control of a quantum system requires accurate determination of the effective system Hamiltonian. We develop a method for estimating the Hamiltonian parameters for some unknown two-state system and providing uncertainty bounds on these ...
Andrew D. Greentree, Cameron J. Wellard, Daniel K. L. Oi, E. Knill, E. Merzbacher, H. H. Ku, I. L. Chuang, J. Preskill, Jared H. Cole, L. Kirkup, L. M. K. Vandersypen, Lloyd C. L. Hollenberg, M. A. Nielsen, R. N. Bracewell, R. R. Ernst, Sonia G. Schirmer   +15 more
core   +2 more sources

Existence and non-existence of solutions to a Hamiltonian strongly degenerate elliptic system

Advances in Nonlinear Analysis, 2017
We study the non-existence and existence of infinitely many solutions to the semilinear degenerate elliptic ...
Anh Cung The, My Bui Kim
doaj   +1 more source

Supersymmetric Bi-Hamiltonian Systems [PDF]

Communications in Mathematical Physics, 2021
We construct super Hamiltonian integrable systems within the theory of Supersymmetric Poisson vertex algebras (SUSY PVAs). We provide a powerful tool for the understanding of SUSY PVAs called the super master formula. We attach some Lie superalgebraic data to a generalized SUSY W-algebra and show that it is equipped with two compatible SUSY PVA ...
Sylvain Carpentier, Uhi Rinn Suh
openaire   +3 more sources

Entropy-energy inequalities for qudit states

, 2014
We establish a procedure to find the extremal density matrices for any finite Hamiltonian of a qudit system. These extremal density matrices provide an approximate description of the energy spectra of the Hamiltonian.
Castaños, Octavio, Figueroa, Armando, López, Julio, López-Peña, Ramón, Man'ko, Margarita A., Man'ko, Vladimir I.   +5 more
core   +1 more source

Interference Effect Between a Parabolic Notch and a Screw Dislocation in Piezoelectric Quasicrystals

Crystals
This study investigates the coupling mechanism between a parabolic notch and dislocations in one-dimensional (1D) hexagonal piezoelectric quasicrystals (PQCs) based on the theory of complex variable functions.
Yuanyuan Gao, Guanting Liu, Chengyan Wang, Junjie Fan   +3 more
doaj   +1 more source

Canonical transformations of linear Hamiltonian systems [PDF]

E3S Web of Conferences
In this paper we consider the linear Hamiltonian systems of differential equations. We explore the normalization of a non-singular Hamiltonian matrix. We solve a system of matrix equations to find the generating function of the canonical transformation ...
Titova Tatiana
doaj   +1 more source

Geometric Scattering in Robotic Telemanipulation [PDF]

, 2002
In this paper, we study the interconnection of two robots, which are modeled as port-controlled Hamiltonian systems through a transmission line with time delay. There will be no analysis of the time delay, but its presence justifies the use of scattering
Mashke, Bernhard, Melchiorri, Claudio, Schaft, Arjan van der, Stramigioli, Stefano   +3 more
core   +5 more sources

Enhancing brain tumor detection in MRI images using YOLO-NeuroBoost model

Frontiers in Neurology
Brain tumors are diseases characterized by abnormal cell growth within or around brain tissues, including various types such as benign and malignant tumors. However, there is currently a lack of early detection and precise localization of brain tumors in
Aruna Chen, Aruna Chen, Aruna Chen, Da Lin, Qiqi Gao   +4 more
doaj   +1 more source