6 papers
Pontus-Mpemba effect in cavity quantum electrodynamics
Stefano Longhi
The quantum Pontus-Mpemba effect is a counterintuitive phenomenon in which a quantum system relaxes faster through a two-step evolution protocol than through a single, unquenched r…
Non-Markovian exceptional points in waveguide quantum electrodynamics
Stefano Longhi
Spontaneous emission of a quantum emitter, such as an excited atom, is a fundamental process in quantum electrodynamics (QED), typically associated with exponential decay to the gr…
Exact dynamics and bound states of a cavity coupled to a two-dimensional reservoir
Heng-Na Xiong, Da-Wei Ye, Yang Yang +4
We demonstrate a robust scheme for quantum information storage based on bound states in a two-dimensional coupled-cavity array. When a target cavity is tuned to resonance with the…
Phase Transitions and Virtual Exceptional Points in Quantum Emitters Coupled to Dissipative Baths
Stefano Longhi
Controlling atom-photon interactions in engineered environments is central to quantum optics and emerging quantum technologies. Non-Hermitian (NH) photonic baths, where dissipation…
Dynamical Phase Transitions in Open Quantum Walks
Stefano Longhi
Dynamical phase transitions in the relaxation behavior of stochastic quantum walks are investigated, focusing on systems where coherent unitary evolution is periodically interrupte…
Lifshitz-like Metastability and Optimal Dephasing in Dissipative Bosonic Lattices
Stefano Longhi
In dissipative bosonic systems, dephasing is typically expected to accelerate relaxation and suppress coherent dynamics. However, we show that in networks of coherently coupled bos…