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We develop operator-theoretic and cohomological tools for quaternionic quasi-Lie structures, with sliding mode control as a motivating application. Three main results are established. First, an exact operator-norm transfer under the…

Optimization and Control · Mathematics 2026-05-28 Nassim Athmouni , Nejib Brahmia , Tarek Fajraoui , Fehmi Mabrouk

Jordan-Wigner-type transformations connecting the spin-3/2 operators and two kinds of fermions are derived. A general condition of fermionizability of spins is obtained and a theorem establishing connection between half integer spins and…

Strongly Correlated Electrons · Physics 2007-05-23 Stanislav V. Dobrov

The comment by Lundeen et al. contains two criticisms of our proposal. While we agree that the state-preparation procedure could be replaced by a simpler setup as proposed by the authors of the comment, we do not agree with the authors on…

Quantum Physics · Physics 2009-11-11 S. E. Ahnert , M. C. Payne

Reply to the preceding comment by Rolf Schilling and Bernhard Schmid [arXiv:1101.5577, Phys. Rev. Lett. 106, 049601 (2011)].

Soft Condensed Matter · Physics 2011-02-01 Atsushi Ikeda , Kunimasa Miyazaki

The purpose of the paper is to obtain estimates for differences of functions of two pairs of commuting contractions on Hilbert space. In particular, Lipschitz type estimates, H\"older type estimates, Schatten--von Neumann estimates are…

Functional Analysis · Mathematics 2018-04-09 Vladimir Peller

Comment on L. Hardy, Phys. Rev. Lett. {\bf 73}, 2279 (1994). It is argued that the experiment proposed by Hardy should not be considered as a single photon experiment.

Quantum Physics · Physics 2016-09-08 L. Vaidman

This paper has been withdrawn by the author(s), due to the existence of a much better paper in http://arxiv.org/abs/cs.CR/0207027

Cryptography and Security · Computer Science 2007-05-23 Boaz Tsaban

In their Rejoinder [arXiv:1105.1316v1], Levin and Pakter repeat some of the points raised in their previous Comment [arXiv:1104.0697v1] (already refuted in our first Reply [arXiv:1104.5036v1]), and present some new ones concerning our…

Statistical Mechanics · Physics 2011-06-17 J. S. Andrade , G. F. T. da Silva , A. A. Moreira , F. D. Nobre , E. M. F. Curado

We characterize the quasianti-Hermitian quaternionic operators in QQM by means of their spectra; moreover, we state a necessary and sufficient condition for a set of quasianti-Hermitian quaternionic operators to be anti-Hermitian with…

Quantum Physics · Physics 2009-11-10 A. Blasi , G. Scolarici , L. Solombrino

We address various aspects of a widely used tool in quantum information theory: the Choi-Jamiolkowski isomorphism [A. Jamiolkowski, Rep. Math. Phys., 3, 275 (1972)]. We review different versions of the isomorphism, their properties and…

Quantum Physics · Physics 2024-08-20 Markus Frembs , Eric G. Cavalcanti

In spite of the relevance of the proposal introduced in the recent work A. Abedi, N. T. Maitra and E. K. U. Gross, J. Chem. Phys. 137, 22A530, 2012, there is an important ingredient which is missing. Namely, the proof that the norms of the…

Chemical Physics · Physics 2013-09-03 J. L. Alonso , J. Clemente-Gallardo , P. Echenique-Robba , J. A. Jover-Galtier

We claim that the analysis presented by Gaulin et al. (Phys. Rev. Lett. 84, 3446 (2000)) does not prove the two-dimensional character of the transition in NaV2O5 nor the charge ordering mechanism of the transition.

Strongly Correlated Electrons · Physics 2007-05-23 S. Ravy , J. E. Lorenzo

We prove that localization functors of crossed modules of groups do not always admit fiberwise (or relative) versions. To do so we characterize the existence of a fiberwise localization by a certain normality condition and compute explicit…

Category Theory · Mathematics 2022-10-31 Olivia Monjon , Jérôme Scherer , Florence Sterck

Ambiguities have recently been found in the definition of the partial derivative (in the case of presence of both explicit and implicit dependencies of the function subjected to differentiation). We investigate the possible influence of…

Mathematical Physics · Physics 2018-11-05 Valeri V. Dvoeglazov

Misinterpretation in the preceding Comment of my recent analysis of the past of a photon is corrected. There is nothing in this analysis which is "contrary to the usual quantum expectations" but, nevertheless, it does provide "further…

Quantum Physics · Physics 2013-10-07 Lev Vaidman

The aim of this paper is to prove a qualitative property, namely the preservation of positivity, for Schr\"odinger-type operators acting on $L^p$ functions defined on (possibly incomplete) Riemannian manifolds. A key assumption is a control…

Analysis of PDEs · Mathematics 2023-10-19 Andrea Bisterzo , Giona Veronelli

This note contains some comments on a recent paper by Friedman on two-component spinors in spacetimes which do not admit a time-orientation, and is intended to clarify the relation of the work reported in that paper to previous literature.

General Relativity and Quantum Cosmology · Physics 2010-04-06 Andrew Chamblin , G. W. Gibbons

We studied carefully the comment by S. G. Karshenboim, V. G. Ivanov and J. Chluba to our paper "Two-photon approximation in the theory of the electron recombination in hydrogen" and found this comment erroneous.

Atomic Physics · Physics 2011-05-17 L. Labzowsky , D. Solovyev

This paper has been removed by arXiv administrators because it plagiarizes P.K. Jena, P.C. Naik and T. Pradhan, "Photon As The Zero Mass Limit Of Dkp Field," J. Phys. A {\bf 13}, 2975 (1980) [not cited within submission]. In addition, the…

General Relativity and Quantum Cosmology · Physics 2019-10-20 T. Yetkin , A. Havare

Reply to the Comment physics/0307134 by A. Helmstetter and D. Sornette