870 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- City, University of LondonGB152 papers
- University of OxfordGB15 papers
- St George's, University of LondonGB14 papers
- Centre National de la Recherche ScientifiqueFR13 papers
- King's College LondonGB11 papers
- Nankai UniversityCN11 papers
- Northeastern UniversityUS7 papers
- University of BolognaIT6 papers
- Austral University of ChileCL5 papers
- Imperial College LondonGB5 papers
- KTH Royal Institute of TechnologySE5 papers
- National Institute for Theoretical PhysicsZA5 papers
18 papers · 1 filter
Eternal life of entropy in non-Hermitian quantum systems
Andreas Fring, Thomas Frith
We find a new effect for the behaviour of Von Neumann entropy. For this we derive the framework for describing Von Neumann entropy in non-Hermitian quantum systems and then apply i…
Time-dependent Darboux (supersymmetric) transformations for non-Hermitian quantum systems
Julia Cen, Andreas Fring, Thomas Frith
We propose time-dependent Darboux (supersymmetric) transformations that provide a scheme for the calculation of explicitly time-dependent solvable non-Hermitian partner Hamiltonian…
Quasi-exactly solvable quantum systems with explicitly time-dependent Hamiltonians
Andreas Fring, Thomas Frith
For a large class of time-dependent non-Hermitain Hamiltonians expressed in terms linear and bilinear combinations of the generators for an Euclidean Lie-algebra respecting differe…
Entangling three qubits without ever touching
Pawel Blasiak, Marcin Markiewicz
All identical particles are inherently correlated from the outset, regardless of how far apart their creation took place. In this paper, this fact is used for extraction of entangl…
Metric versus observable operator representation, higher spin models
Andreas Fring, Thomas Frith
We elaborate further on the metric representation that is obtained by transferring the time-dependence from a Hermitian Hamiltonian to the metric operator in a related non-Hermitia…
Klein-Gordon equation for a charged particle in space varying electromagnetic fields-A systematic study via Laplace transform
Tapas Das, Altug Arda
Exact solutions of the Klein-Gordon equation for a charged particle in the presence of three spatially varying electromagnetic fields, namely, (i) ,…
The non-Hermitian Swanson model with a time-dependent metric
Andreas Fring, Miled H. Y. Moussa
We provide further non-trivial solutions to the recently proposed time-dependent Dyson and quasi-Hermiticity relation. Here we solve them for the generalized version of the non-Her…
Unitary quantum evolution for time-dependent quasi-Hermitian systems with non-observable Hamiltonians
Andreas Fring, Miled H. Y. Moussa
It has been argued that it is incompatible to maintain unitary time-evolution for time-dependent non-Hermitian Hamiltonians when the metric operator is explicitly time-dependent. W…
A unifying E2-quasi-exactly solvable model
Andreas Fring
A new non-Hermitian E2-quasi-exactly solvable model is constructed containing two previously known models of this type as limits in one of its three parameters. We identify the opt…
Nonclassicality versus entanglement in a noncommutative space
Sanjib Dey, Andreas Fring, Véronique Hussin
In a setting of noncommutative space with minimal length we confirm the general assertion that the more nonclassical an input state for a beam splitter is, the more entangled its o…
Time-dependent massless Dirac fermions in graphene
Boubakeur Khantoul, Andreas Fring
Using the Lewis-Riesenfeld method of invariants we construct explicit analytical solutions for the massless Dirac equation in 2+1 dimensions describing quasi-particles in graphene.…
Spontaneous PT-symmetry breaking for systems of noncommutative Euclidean Lie algebraic type
Sanjib Dey, Andreas Fring, Thilagarajah Mathanaranjan
We propose a noncommutative version of the Euclidean Lie algebra . Several types of non-Hermitian Hamiltonian systems expressed in terms of generic combinations of the generat…
Exact scattering matrix of graphs in magnetic field and quantum noise
Vincent Caudrelier, Mihail Mintchev, Eric Ragoucy
We consider arbitrary quantum wire networks modelled by finite, noncompact, connected quantum graphs in the presence of an external magnetic field. We find a general formula for th…
A non self-adjoint model on a two dimensional noncommutative space with unbound metric
Fabio Bagarello, Andreas Fring
We demonstrate that a non self-adjoint Hamiltonian of harmonic oscillator type defined on a two-dimensional noncommutative space can be diagonalized exactly by making use of pseudo…
Bohmian quantum trajectories from coherent states
Sanjib Dey, Andreas Fring
We find that real and complex Bohmian quantum trajectories resulting from well-localized Klauder coherent states in the quasi-Poissonian regime possess qualitatively the same type…
Hermitian versus non-Hermitian representations for minimal length uncertainty relations
Sanjib Dey, Andreas Fring, Boubakeur Khantoul
We investigate four different types of representations of deformed canonical variables leading to generalized versions of Heisenberg's uncertainty relations resulting from noncommu…
Non-Hermitian Hamiltonians with real eigenvalues coupled to electric fields: from the time-independent to the time dependent quantum mechanical formulation
Carla Figueira de Morisson Faria, Andreas Fring
We provide a reviewlike introduction into the quantum mechanical formalism related to non-Hermitian Hamiltonian systems with real eigenvalues. Starting with the time-independent fr…
Quantum Mechanics with Difference Operators
V. K. Dobrev, H. -D. Doebner, R. Twarock
A formulation of quantum mechanics with additive and multiplicative (q-)difference operators instead of differential operators is studied from first principles. Borel-quantisation…