584 citations
- Istituto di Fotonica e NanotecnologieIT109 papers
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10 papers · 2 filters
Oscillating potential well in complex plane and the adiabatic theorem
Stefano Longhi
A quantum particle in a slowly-changing potential well , periodically shaken in time at a slow frequency , provides an important quantum mechanical system w…
Floquet exceptional points and chirality in non-Hermitian Hamiltonians
Stefano Longhi
Floquet exceptional points correspond to the coalescence of two (or more) quasi-energies and corresponding Floquet eigenstates of a time-periodic non-Hermitian Hamiltonian. They ge…
Rapidly-oscillating scatteringless non-Hermitian potentials and the absence of Kapitza stabilization
Stefano Longhi
In the framework of the ordinary non-relativistic quantum mechanics, it is known that a quantum particle in a rapidly-oscillating bound potential with vanishing time average can be…
Time reversal of a discrete system coupled to a continuum based on non-Hermitian flip
Stefano Longhi
Time reversal in quantum or classical systems described by an Hermitian Hamiltonian is a physically allowed process, which requires in principle inverting the sign of the Hamiltoni…
Photonic Loschmidt echo in binary waveguide lattices
Stefano Longhi
Time reversal is one of the most intriguing yet elusive wave phenomenon of major interest in different areas of classical and quantum physics. Time reversal requires in principle t…
Nonadiabatic robust excitation transfer assisted by an imaginary gauge field
Stefano Longhi
A nonadiabatic and robust method of excitation transfer in a non-Hermitian tight-binding linear chain, assisted by an imaginary gauge field, is theoretically proposed. The gauge fi…