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The problem of ordering operators has afflicted quantum mechanics since its foundation. Several orderings have been devised, but a systematic procedure to move from one ordering to another is still missing. The importance of establishing…

Quantum Physics · Physics 2023-05-25 Luca Ferialdi

Different finite difference replacements for the derivative are analyzed in the context of the Heisenberg commutation relation. The type of the finite difference operator is shown to be tied to whether one can naturally consider $P$ and $X$…

High Energy Physics - Theory · Physics 2009-10-30 Andrzej Z. Gorski , Jacek Szmigielski

In this paper a nonlocal generalization of field quantization is suggested. This quantization principle presupposes the assumption that the commutator between a field operator an the operator of the canonical conjugated variable referring…

General Physics · Physics 2016-09-02 Martin Kober

The matrix normed structure of the unitization of a (non-selfadjoint) operator algebra is determined by that of the original operator algebra. This yields a classification up to completely isometric isomorphism of two-dimensional unital…

funct-an · Mathematics 2007-05-23 Ralf Meyer

We formulate the theory of electron transport through coupled-quantum dots by extending the auxiliary operator representation. By using the generating functional technique, we derive the exact expressions for currents, dot-occupation…

Mesoscale and Nanoscale Physics · Physics 2015-05-20 Jung Hyun Oh , D. Ahn , Vladimir Bubanja

Quantum algebra of differential operators are studied

q-alg · Mathematics 2008-02-03 Alexander Verbovetsky

We derived the equation of the density operator for generalized entropy and generalized expectation value with quantum analysis when conserved quantities exist. The derived equation is simplified when the conventional expectation value is…

Statistical Mechanics · Physics 2021-08-31 Masamichi Ishihara

Based on the matrix realignment and partial transpose, we develop an approach to entangling power and operator entanglement of quantum unitary operators. We demonstrate efficiency of the approach by studying several unitary operators on…

Quantum Physics · Physics 2009-11-13 Zhihao Ma , Xiaoguang Wang

In this paper, we will address broader concepts for Dunford-Pettis operators, presenting new classes and results that correlate this class with others already well-studied in the literature, as well as an approach outside the origin. We…

Functional Analysis · Mathematics 2026-04-02 Joilson Ribeiro , Fabricio Santos

We extend the theory of distributional kernel operators to a framework of generalized functions, in which they are replaced by integral kernel operators. Moreover, in contrast to the distributional case, we show that these generalized…

General Mathematics · Mathematics 2016-08-16 Séverine Bernard , Jean-François Colombeau , Antoine Delcroix

We improve the existing Ando-Hiai inequalities for operator means and present new ones for operator perspectives in several ways. We also provide the operator perspective version of the Lie-Trotter formula and consider the extension problem…

Functional Analysis · Mathematics 2019-05-07 Fumio Hiai , Yuki Seo , Shuhei Wada

In this work we take a closer look at the algebraic-operator correspondence between the momentum space and the position space which defines the form of the canonical momentum operator in position space in Quantum Mechanics (QM). Starting…

Quantum Physics · Physics 2026-01-21 Siddharth Dwivedi

In this paper we investigate the connections between the several different extensions of the concept of absolutely summing operators.

Functional Analysis · Mathematics 2007-05-23 Daniel M. Pellegrino

In this paper we study the theory of operators on complex Hilbert spaces, which achieve the norm in the unit sphere. We prove important results concerning the characterization of the AN operators, see Definition 1.2. The class of AN…

Functional Analysis · Mathematics 2010-11-25 Xavier Carvajal , Wladimir Neves

The work analyzes the theory of Dunkl operator as a moment differential operator. This last operator generalizes the first one whenever the sequence of moments satisfies appropriate classical properties, classically considered in the…

Complex Variables · Mathematics 2025-10-14 Edmundo J. Huertas , Alberto Lastra , Judit Minguez Ceniceros

An asymmetric operator of generalised translation is introduced in this paper. Using this operator, we define a generalised modulus of smoothness and prove direct and inverse theorems of approximation theory for it.

Functional Analysis · Mathematics 2012-09-03 Mikhail K. Potapov , Faton M. Berisha

We review recent progress in operator algebraic approach to conformal quantum field theory. Our emphasis is on use of representation theory in classification theory. This is based on a series of joint works with R. Longo.

Mathematical Physics · Physics 2007-05-23 Yasuyuki Kawahigashi

The present paper deals with a generalization of the Baskakov operators. Some direct theorems, asymptotic formula and $A$-statistical convergence are established. Our results are based on a $\rho$ function. These results include the…

Classical Analysis and ODEs · Mathematics 2016-08-08 Prashantkumar Patel , Vishnu Narayan Mishra , Mediha Örkcü

A generalization of the Dirac's canonical quantization theory for a system with second-class constraints is proposed as the fundamental commutation relations that are constituted by all commutators between positions, momenta and Hamiltonian…

Mathematical Physics · Physics 2014-10-07 D. M. Xun , Q. H. Liu , X. M. Zhu

We revisit the linearization theorems for proper Lie groupoids around general orbits (statements and proofs). In the the fixed point case (known as Zung's theorem) we give a shorter and more geometric proof, based on a Moser deformation…

Differential Geometry · Mathematics 2012-10-30 Marius Crainic , Ivan Struchiner