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We use quantum harmonic analysis for densely defined operators to provide a simplified proof of the Berger-Coburn theorem for boundedness of Toeplitz operators. In addition, we revisit compactness and Schatten-class membership of densely…

泛函分析 · 数学 2025-08-20 Vishwa Dewage , Mishko Mitkovski

We study the dependence of geometric quantization of the standard symplectic torus on the choice of invariant polarization. Real and mixed polarizations are interpreted as degenerate complex structures. Using a weak version of the equations…

辛几何 · 数学 2010-01-26 Thomas Baier , José M. Mourão , João P. Nunes

We construct phase-space structure of a typical higher-order theory of gravity, in the background of anisotropic Bianchi-1 mini-superspace, following `Modified Horowitz Formalism' as well as applying `Dirac Algorithm' (after taking care of…

广义相对论与量子宇宙学 · 物理学 2021-05-21 Subhra Debnath , Abhik Kumar Sanyal

Classical dynamics is formulated as a Hamiltonian flow on phase space, while quantum mechanics is formulated as a unitary dynamics in Hilbert space. These different formulations have made it difficult to directly compare quantum and…

量子物理 · 物理学 2007-05-23 A. J. Scott , G. J. Milburn

We investigate the space of quantum operations, as well as the larger space of maps which are positive, but not completely positive. A constructive criterion for decomposability is presented. A certain class of unistochastic operations,…

量子物理 · 物理学 2007-05-23 Karol Zyczkowski , Ingemar Bengtsson

A correspondence is established between measure-preserving, ergodic dynamics of a classical harmonic oscillator and a quantum mechanical gauge theory on two-dimensional Minkowski space. This correspondence is realized through an isometric…

动力系统 · 数学 2024-06-19 Dimitrios Giannakis

The conservative dynamics of two point masses given in harmonic coordinates up to the third post-Newtonian (3pN) order is treated within the framework of constrained canonical dynamics. A representation of the approximate Poincar\'e algebra…

广义相对论与量子宇宙学 · 物理学 2008-11-26 Raoul-Martin Memmesheimer , Gerhard Schäfer

The main purpose of this article is to extend some of the ideas from Schubert calculus to the more general setting of Hamiltonian torus actions on compact symplectic manifolds with isolated fixed points. Given a generic component of the…

辛几何 · 数学 2009-09-10 R. F. Goldin , S. Tolman

We analyze particle dynamics on $N$ dimensional one-sheet hyperboloid embedded in $N+1$ dimensional Minkowski space. The dynamical integrals constructed by $SO_\uparrow (1,N)$ symmetry of spacetime are used for the gauge-invariant…

广义相对论与量子宇宙学 · 物理学 2009-10-31 George Jorjadze , Wlodzimierz Piechocki

Given a finite-to-one map acting on a compact metric space, one classically constructs for each potential in an appropriate Banach space of functionsa transfer operator acting on functions. Under suitable condition, the…

动力系统 · 数学 2015-08-07 Paolo Giulietti , Benoit Kloeckner , Artur Lopes , Diego Marcon

One of the main concepts in quantum physics is a density matrix, which is a symmetric positive definite matrix of trace one. Finite probability distributions are a special case where the density matrix is restricted to be diagonal. Density…

量子物理 · 物理学 2014-08-14 Manfred K. Warmuth , Dima Kuzmin

We consider a quaternionic quantum formalism for the description of quantum states and quantum dynamics. We prove that generalized quantum measurements on physical systems in quaternionic quantum theory can be simulated by usual quantum…

量子物理 · 物理学 2015-07-29 Matthew A. Graydon

We show that the classical mechanics of an algebraic model are implied by its quantizations. An algebraic model is defined, and the corresponding classical and quantum realizations are given in terms of a spectrum generating algebra.…

量子物理 · 物理学 2007-05-23 Stephen D. Bartlett , David J. Rowe

In the context of our recently developed emergent quantum mechanics, and, in particular, based on an assumed sub-quantum thermodynamics, the necessity of energy quantization as originally postulated by Max Planck is explained by means of…

量子物理 · 物理学 2011-08-30 Gerhard Groessing , Johannes Mesa Pascasio , Herbert Schwabl

We show that there are well separated families of quantum expanders with asymptotically the maximal cardinality allowed by a known upper bound. This has applications to the "growth" of certain operator spaces: It implies asymptotically…

算子代数 · 数学 2014-12-23 Gilles Pisier

The physical variables of classical thermodynamics occur in conjugate pairs such as pressure/volume, entropy/temperature, chemical potential/particle number. Nevertheless, and unlike in classical mechanics, there are an odd number of such…

数学物理 · 物理学 2008-11-26 S. G. Rajeev

A canonical transformation is performed on the phase space of a number of homogeneous cosmologies to simplify the form of the scalar (or, Hamiltonian) constraint. Using the new canonical coordinates, it is then easy to obtain explicit…

广义相对论与量子宇宙学 · 物理学 2009-07-10 Abhay Ashtekar , Ranjeet S. Tate , Claes Uggla

We derive an intuitive and novel method to represent nodes in a graph with special unitary operators, or quantum operators, which does not require parameter training and is competitive with classical methods on scoring similarity between…

量子物理 · 物理学 2024-07-22 Andrew Vlasic , Salvador Aguinaga

A general classical theorem is presented according to which all invariant relations among the space time metric scalars, when turned into functions on the Phase Space of full Pure Gravity (using the Canonical Equations of motion), become…

广义相对论与量子宇宙学 · 物理学 2007-05-23 T. Christodoulakis , G. O. Papadopoulos

We formulate quantum mechanics in spacetimes with real-order fractional geometry and more general factorizable measures. In spacetimes where coordinates and momenta span the whole real line, Heisenberg's principle is proven and the…

高能物理 - 理论 · 物理学 2012-10-18 Gianluca Calcagni , Giuseppe Nardelli , Marco Scalisi