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19952026
Showing 2018 · quant-phShow all

9 papers · 2 filters

quant-ph2018★ 7 cited

Anyonic symmetry, drifting potentials and non-Hermitian delocalization

S. Longhi, E. Pinotti

We consider wave dynamics for a Schrödinger equation with a non-Hermitian Hamiltonian satisfying the generalized (anyonic) parity-time symmetry $\mathcal{PT H}= \exp(…

quant-ph2018★ 23 cited

Quantum interference and exceptional points

Stefano Longhi

Exceptional points (EPs), i.e. branch point singularities of non-Hermitian Hamiltonians, are ubiquitous in optics. So far, the signatures of EPs have been mostly studied assuming c…

quant-ph2018★ 103 cited

Quantum Incompatibility Witnesses

Claudio Carmeli, Teiko Heinosaari, Alessandro Toigo

We demonstrate that quantum incompatibility can always be detected by means of a state discrimination task with partial intermediate information. This is done by showing that only…

quant-ph2018★ 10 cited

Mathematical Models of Markovian Dephasing

Franco Fagnola, John E. Gough, Hendra I. Nurdin +1

We develop a notion of dephasing under the action of a quantum Markov semigroup in terms of convergence of operators to a block-diagonal form determined by irreducible invariant su…

quant-ph2018★ 184 cited

Ultrafast Generation and Control of an Electron Vortex Beam via Chiral Plasmonic Near Fields

G. M. Vanacore, G. Berruto, I. Madan +12

Vortex-carrying matter waves, such as chiral electron beams, are of significant interest in both applied and fundamental science. Continuous wave electron vortex beams are commonly…

quant-ph2018★ 2 cited

Uncertainty relations and information loss for spin-1/2 measurements

Alberto Barchielli, Matteo Gregoratti

We formulate entropic measurements uncertainty relations (MURs) for a spin-1/2 system. When incompatible observables are approximatively jointly measured, we use relative entropy t…

quant-ph2018★ 46 cited

State discrimination with post-measurement information and incompatibility of quantum measurements

Claudio Carmeli, Teiko Heinosaari, Alessandro Toigo

We discuss the following variant of the standard minimum error state discrimination problem: Alice picks the state she sends to Bob among one of several disjoint state ensembles, a…

quant-ph2018★ 8 cited

Scattering of accelerated wave packets

S. Longhi, S. A. R. Horsley, G. Della Valle

Wave-packet scattering from a stationary potential is significantly modified when the wave-packet is subject to an external time-dependent force during the interaction. In the semi…

quant-ph2018

On the canonical quantization of the electromagnetic field and the emergence of gauge invariance

M. Blasone, E. Celeghini, P. Jizba +2

In the framework of the canonical quantization of the electromagnetic field, we impose as primary condition on the dynamics the positive definiteness of the energy spectrum. This i…