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Extensions of dissipative operators with closable imaginary part [PDF]

open access: yesOpuscula Mathematica, 2021
Given a dissipative operator \(A\) on a complex Hilbert space \(\mathcal{H}\) such that the quadratic form \(f \mapsto \text{Im}\langle f, Af \rangle\) is closable, we give a necessary and sufficient condition for an extension of \(A\) to still be ...
Christoph Fischbacher
doaj   +1 more source

Dissipative operators and operator Lipschitz functions [PDF]

open access: yesProceedings of the American Mathematical Society, 2019
14 pages.
Aleksandrov A.B.   +2 more
openaire   +3 more sources

Nonunitary gate operations by dissipation engineering

open access: yesQuantum Science and Technology, 2022
Abstract Irreversible logic is at odds with unitary quantum evolution. Emulating such operations by classical measurements can result in disturbances and high resource demands. To overcome these limitations, we propose protocols that harness dissipation to realize the nonunitary evolution required for irreversible gate operations.
Elias Zapusek   +2 more
openaire   +3 more sources

Coordinate-Free Approach for the Model Operator Associated With a Third-Order Dissipative Operator

open access: yesFrontiers in Physics, 2019
In this paper we investigate the spectral properties of a third-order differential operator generated by a formally-symmetric differential expression and maximal dissipative boundary conditions.
Ekin Uğurlu   +2 more
doaj   +1 more source

Completeness Theorem for Eigenparameter Dependent Dissipative Dirac Operator with General Transfer Conditions

open access: yesJournal of Function Spaces, 2020
This paper deals with a singular (Weyl’s limit circle case) non-self-adjoint (dissipative) Dirac operator with eigenparameter dependent boundary condition and finite general transfer conditions.
Kun Li   +3 more
doaj   +1 more source

On Krylov complexity in open systems: an approach via bi-Lanczos algorithm

open access: yesJournal of High Energy Physics, 2023
Continuing the previous initiatives [1, 2], we pursue the exploration of operator growth and Krylov complexity in dissipative open quantum systems. In this paper, we resort to the bi-Lanczos algorithm generating two bi-orthogonal Krylov spaces, which ...
Aranya Bhattacharya   +3 more
doaj   +1 more source

Integral representation of the linear Boltzmann operator for granular gas dynamics with applications [PDF]

open access: yes, 2007
We investigate the properties of the collision operator associated to the linear Boltzmann equation for dissipative hard-spheres arising in granular gas dynamics.
B. Lods   +20 more
core   +4 more sources

Stable iPEPO Tensor-Network Algorithm for Dynamics of Two-Dimensional Open Quantum Lattice Models

open access: yesPhysical Review X, 2021
Being able to accurately describe the dynamics steady states of driven and/or dissipative but quantum correlated lattice models is of fundamental importance in many areas of science: from quantum information to biology.
C. Mc Keever, M. H. Szymańska
doaj   +1 more source

Trace formulae for dissipative and coupled scattering systems [PDF]

open access: yes, 2007
For scattering systems consisting of a (family of) maximal dissipative extension(s) and a selfadjoint extension of a symmetric operator with finite deficiency indices, the spectral shift function is expressed in terms of an abstract Titchmarsh-Weyl ...
Behrndt, Jussi   +2 more
core   +3 more sources

Nonself-Adjoint Second-Order Difference Operators in Limit-Circle Cases

open access: yesAbstract and Applied Analysis, 2012
We consider the maximal dissipative second-order difference (or discrete Sturm-Liouville) operators acting in the Hilbert space ℓ2𝑤(ℤ) (ℤ:={0,±1,±2,…}), that is, the extensions of a minimal symmetric operator with defect index (2,2) (in the Weyl ...
Bilender P. Allahverdiev
doaj   +1 more source

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