Results 31 to 40 of about 304,578 (296)
Shock and Vibration, 2022 Based on the symplectic structure of the Hamiltonian matrix, the precise integration method (PIM), and the Wittrick–Williams (W-W) algorithm, a generalized method for computing the dispersion curves of guided waves in multilayered anisotropic magneto ...
Yanhui Zhang, Qiang Gao
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Symplecticity and relationships among the fundamental properties in linear optics
African Vision and Eye Health, 2010 Because of symplecticity the four fundamental first-order optical properties of an optical system are not independent. Relationships among them reduce the number of degrees of freedom of a system’s transference from 16 to 10.
W. F. Harris
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Entanglement entropy in quantum spin chains with broken parity number symmetry
SciPost Physics, 2022 Consider a generic quantum spin chain that can be mapped to free quadratic fermions via Jordan-Wigner (JW) transformation. In the presence of arbitrary boundary magnetic fields, this Hamiltonian is no longer a quadratic Hamiltonian after JW ...
Arash Jafarizadeh, M. A. Rajabpour
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Nonlinear Eigenvalue Approach to Differential Riccati Equations for Contraction Analysis [PDF]
, 2016 In this paper, we extend the eigenvalue method of the algebraic Riccati equation to the differential Riccati equation (DRE) in contraction analysis. One of the main results is showing that solutions to the DRE can be expressed as functions of nonlinear ...
Kawano, Yu, Ohtsuka, Toshiyuki
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MATEC Web of Conferences, 2017 In this paper we consider the normalization of quadratic Hamiltonian. We get the new method to find the generating function of the canonical transformation. We obtain the solution of the system of matrix equations to find this transformation.
Titova Tatiana
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Bootstrapping the gap in quantum spin systems
Journal of High Energy Physics, 2023 In this work we report on a new bootstrap method for quantum mechanical problems that closely mirrors the setup from conformal field theory (CFT). We use the equations of motion to develop an analogue of the conformal block expansion for matrix elements ...
Colin Oscar Nancarrow, Yuan Xin
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Integrability and level crossing manifolds in a quantum Hamiltonian system [PDF]
, 1998 We consider a two-spin model, represented classically by a nonlinear autonomous Hamiltonian system with two degrees of freedom and a nontrivial integrability condition, and quantum mechanically by a real symmetric Hamiltonian matrix with blocks of ...
E. Magyari +12 more
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SciPost Physics, 2022 We present a gravitational theory that interpolates between JT gravity, and a gravity theory with a fixed boundary Hamiltonian. For this, we consider a matrix integral with the insertion of a Gaussian with variance $\sigma^2$, centered around a matrix
Andreas Blommaert, Jorrit Kruthoff
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Equivariant Matrix Factorizations and Hamiltonian reduction
, 2015 Let $X$ be a smooth scheme with an action of an algebraic group $G$. We establish an equivalence of two categories related to the corresponding moment map $ : T^*X \to Lie(G)^*$ - the derived category of G-equivariant coherent sheaves on the derived fiber $ ^{-1}(0)$ and the derived category of $G$-equivariant matrix factorizations on $T^*X \times ...
Arkhipov, Sergey, Kanstrup, Tina
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IEEE Transactions on Quantum Engineering, 2023 Toeplitz matrix reconstruction algorithms (TMRAs) are one of the central subroutines in array processing for wireless communication applications. The classical TMRAs have shown excellent accuracy in the spectral estimation for both uncorrelated and ...
Mostafizur Rahaman Laskar +2 more
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