Results 41 to 50 of about 9,867 (115)

From the Equations of Motion to the Canonical Commutation Relations

open access: yes, 2010
The problem of whether or not the equations of motion of a quantum system determine the commutation relations was posed by E.P.Wigner in 1950. A similar problem (known as "The Inverse Problem in the Calculus of Variations") was posed in a classical ...
Ercolessi, Elisa   +2 more
core   +1 more source

Curvature of quaternionic skew‐Hermitian manifolds and bundle constructions

open access: yesMathematische Nachrichten, Volume 298, Issue 1, Page 87-112, January 2025.
Abstract This paper is devoted to a description of the second‐order differential geometry of torsion‐free almost quaternionic skew‐Hermitian manifolds, that is, of quaternionic skew‐Hermitian manifolds (M,Q,ω)$(M, Q, \omega)$. We provide a curvature characterization of such integrable geometric structures, based on the holonomy theory of symplectic ...
Ioannis Chrysikos   +2 more
wiley   +1 more source

Universality Conjecture for all Airy, Sine and Bessel Kernels in the Complex Plane

open access: yes, 2012
We address the question of how the celebrated universality of local correlations for the real eigenvalues of Hermitian random matrices of size NxN can be extended to complex eigenvalues in the case of random matrices without symmetry.
Akemann, G., Phillips, M. J.
core  

Trotterless Simulation of Open Quantum Systems for NISQ Quantum Devices

open access: yesAdvanced Quantum Technologies, Volume 8, Issue 1, January 2025.
Open quantum systems exhibit complex dynamics that can be simulated on quantum computers to provide physical insights into their behavior. This work proposes a new method for simulating these systems that reduces the effect of noise and errors on modern quantum hardware.
Colin Burdine, Enrique P. Blair
wiley   +1 more source

Semigroup approach to the sign problem in quantum Monte Carlo simulations

open access: yes
We propose a framework based on the concept of the semigroup to understand the fermion sign problem. By using properties of contraction semigroups, we obtain sufficient conditions for quantum lattice fermion models to be sign-problem-free.
Wei, Zhong-Chao
core   +1 more source

MagNet: A Neural Network for Directed Graphs. [PDF]

open access: yesAdv Neural Inf Process Syst, 2021
Zhang X   +4 more
europepmc   +1 more source

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