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We study nonlinear excitations described by DNLS-type equations with so-called competing nonlinearities. These are the nonlinearities that consist of two power terms with coefficients of different sign. A key feature of these models is the…

Pattern Formation and Solitons · Physics 2025-07-23 G. L. Alfimov , P. A. Korchagin , F. K. Abdullaev

In this paper, we study the physics of mesoscopic systems with noninteracting, but fixed number of electrons. From a technical point of view, this means a discussion of the differences between the canonical and the grand canonical ensemble…

Condensed Matter · Physics 2016-08-31 W. Lehle , A. Schmid

To a system of second order ordinary differential equations (SODE) one can assign a canonical nonlinear connection that describes the geometry of the system. In this work we develop a geometric setting that allows us to assign a canonical…

Differential Geometry · Mathematics 2011-10-24 Ioan Bucataru , Oana Constantinescu , Matias F. Dahl

Coupled cluster (CC) methods are among the most accurate methods in quantum chemistry. However, the standard CC linear response formulation is not gauge invariant resulting in errors when modelling properties like optical rotation and…

Chemical Physics · Physics 2018-03-13 Rolf H. Myhre

A good canonical projection of a surface $S$ of general type is a morphism to the 3-dimensional projective space P^3 given by 4 sections of the canonical line bundle. To such a projection one associates the direct image sheaf F of the…

Algebraic Geometry · Mathematics 2007-05-23 Fabrizio Catanese , Frank Olaf Schreyer

Within the C*-algebraic framework of the resolvent algebra for canonical quantum systems, the structure of oscillating lattice systems with bounded nearest neighbor interactions is studied in any number of dimensions. The global dynamics of…

Mathematical Physics · Physics 2017-05-24 Detlev Buchholz

The second-order nonlinear responses of inviscid chiral fluids near local equilibrium are investigated by applying the chiral kinetic theory (CKT) incorporating side-jump effects. It is shown that the local equilibrium distribution function…

High Energy Physics - Theory · Physics 2019-04-09 Yoshimasa Hidaka , Shi Pu , Di-Lun Yang

In this paper, we discuss the quantum dynamics of a nonlinear system that admits temporally localized solutions at the classical level. We consider a general ordered position-dependent mass Hamiltonian in which the ordering parameters of…

Quantum Physics · Physics 2022-08-01 V. Chithiika Ruby , V. K. Chandrasekar , M. Lakshmanan

We investigate the role of local force balance in the transition from a microcanonical ensemble of static granular packings, characterized by an invariant stress, to a canonical ensemble. Packings in two dimensions admit a reciprocal…

Soft Condensed Matter · Physics 2015-05-14 Brian P. Tighe , Thijs J. H. Vlugt

Canonical correlation analysis (CCA) is a technique for measuring the association between two multivariate data matrices. A regularized modification of canonical correlation analysis (RCCA) which imposes an $\ell_2$ penalty on the CCA…

Methodology · Statistics 2021-07-30 Elena Tuzhilina , Leonardo Tozzi , Trevor Hastie

We prove the existence of resolution of singularities for arbitrary (not necessarily reduced or irreducible) excellent two-dimensional schemes, via permissible blow-ups. The resolution is canonical, and functorial with respect to…

Algebraic Geometry · Mathematics 2013-02-19 Vincent Cossart , Uwe Jannsen , Shuji Saito

Quantum dynamics with local interactions in lattice models display rich physics, but is notoriously hard to study. Dual-unitary circuits allow for exact answers to interesting physical questions in clean or disordered one- and…

Quantum Physics · Physics 2024-02-21 Xie-Hang Yu , Zhiyuan Wang , Pavel Kos

Quantum systems are invariably open, evolving under surrounding influences rather than in isolation. Standard open quantum system methods eliminate all information on the environmental state to yield a tractable description of the system…

Quantum Physics · Physics 2014-09-26 Jake Iles-Smith , Neill Lambert , Ahsan Nazir

How does an electrochemical interface respond to changes in the electrode potential? How does the response affect the key properties of the system - energetics, excess charge, capacitance? Essential questions key to ab-initio simulations of…

Chemical Physics · Physics 2023-07-20 Simeon D. Beinlich , Georg Kastlunger , Karsten Reuter , Nicolas G. Hörmann

A new approach to quantum gravity is presented based on a nonlinear quantization scheme for canonical field theories with an implicitly defined Hamiltonian. The constant mean curvature foliation is employed to eliminate the momentum…

General Relativity and Quantum Cosmology · Physics 2009-11-10 Charles H-T Wang

Canonical extension of finitary ordered structures such as lattices, posets, proximity lattices, etc., is a certain completion which entirely describes the topological dual of the ordered structure and it does so in a purely algebraic and…

Category Theory · Mathematics 2022-05-12 Tomáš Jakl

Calderbank-Shor-Steane (CSS) codes are a class of quantum error correction codes that contains the toric code and fracton models. A procedure called foliation defines a cluster state for a given CSS code. We use the CSS chain complex and…

Quantum Physics · Physics 2025-12-23 Takuya Okuda , Aswin Parayil Mana , Hiroki Sukeno

We study effects of nonlocality of the cubic self-focusing nonlinearity on the stability and symmetry-breaking bifurcation (SBB) of solitons in the model of a planar dual-core optical waveg- uide with nonlocal (thermal) nonlinearity. In…

Pattern Formation and Solitons · Physics 2012-05-31 Xianling Shi , Boris A. Malomed , Fangwei Ye , Xianfeng Chen

In the recent paper [2], it was proved that the closure of the planar diffeomorphisms in the Sobolev norm consists of the functions which are non-crossing (NC), i.e., the functions which can be uniformly approximated by continuous…

Functional Analysis · Mathematics 2020-04-20 Daniel Campbell , Aldo Pratelli , Emanuela Radici

Canonical duality-triality is a breakthrough methodological theory, which can be used not only for modeling complex systems within a unified framework, but also for solving a wide class of challenging problems from real-world applications.…

Mathematical Physics · Physics 2014-11-27 David Y Gao , Ning Ruan , Vittorio Latorre