5 papers
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…
Phase Transitions as Emergent Geometric Phenomena: A Deterministic Entropy Evolution Law
Loris Di Cairano
We show that thermodynamics can be formulated naturally from the intrinsic geometry of phase space alone-without postulating an ensemble, which instead emerges from the geometric s…
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…
The specific heat anomaly stems from a third-order phase transition in the 2D lattice sine-Gordon model
Loris Di Cairano, Alexandre Tkatchenko
The specific heat anomaly (SHA) is broadly observed in statistical mechanics, appearing as a smooth, system-size-independent peak in the specific heat, in contrast to the singular…