4 papers · 1 filter
The Constrained Origin of Canonical and Microcanonical Ensembles in Quantum Theory
Loris Di Cairano
In quantum theory, equilibrium statistical mechanics is usually formulated through the canonical ensemble, whose privileged status is tied to the Euclidean continuation of time evo…
Non-equilibrium quantum field theory of the free-electron laser in Keldysh formalism
Loris Di Cairano
We develop a non-equilibrium quantum field theory of the free-electron laser based on the Preparata model, using the real-time Keldysh formalism. Starting from a microscopic Lagran…
Secret Entanglement, Public Geometry. Quantum Cryptography from a Geometric Perspective
Loris Di Cairano
Can a secret be hidden not in which quantum state is prepared, but in the way that state \emph{moves} through its space of possibilities? Motivated by this question, we propose an…
Geometric Entanglement Entropy on Projective Hilbert Space
Loris Di Cairano
Entanglement for pure bipartite states is most commonly quantified in a state-by-state manner to each pure state of a bipartite system a scalar quantity, such as the von Neumann en…