104 citations · 1k across the 57 of their papers we have counts for
6 papers · 1 filter
Conditional states and entropy in qudit-qubit systems
M. Bilkis, N. Canosa, R. Rossignoli +1
We examine, in correlated mixed states of qudit-qubit systems, the set of all conditional qubit states that can be reached after local measurements at the qudit based on rank-1 pro…
Inducing critical phenomena in spin chains through sparse alternating fields
M. Cerezo, R. Rossignoli, N. Canosa +1
We analyze the phase diagram of the exact ground state (GS) of spin- chains with ferromagnetic couplings under -alternating field configurations, i.e, sparse alternatin…
History state formalism for Dirac's theory
N. L. Diaz, R. Rossignoli
We propose a history state formalism for a Dirac particle. By introducing a reference quantum clock system it is first shown that Dirac's equation can be derived by enforcing a tim…
History states of systems and operators
A. Boette, R. Rossignoli
We discuss some fundamental properties of discrete system-time history states. Such states arise for a quantum reference clock of finite dimension and lead to a unitary evolution o…
Fermionic Entanglement in Superconducting Systems
M. Di Tullio, N. Gigena, R. Rossignoli
We examine distinct measures of fermionic entanglement in the exact ground state of a finite superconducting system. It is first shown that global measures such as the one-body ent…
Nonlinear dynamics of a semiquantum Hamiltonian in the vicinity of quantum unstable regimes
A. M. Kowalski, R. Rossignoli
We examine the emergence of chaos in a non-linear model derived from a semiquantum Hamiltonian describing the coupling between a classical field and a quantum system. The latter co…