41 citations · 137 across the 35 of their papers we have counts for
37 papers
Frame-dependent coherence of Gaussian quantum states
Nicolae Cotfas
A Hilbert space is usually described using an orthonormal basis, but a more general description can be defined using a tight frame. In the case of continuous-variable Gaussian stat…
On a discrete version of the position-momentum commutation relation
Nicolae Cotfas
The usual position-momentum commutation relation plays a fundamental role in the mathematical description of continuous-variable quantum systems. In the case of a qudit described b…
Frame-dependent coherence of a quantum state
Nicolae Cotfas
The tight frames can be regarded as a particular case of POVMs (positive operator-valued measures describing generalized measurements), namely the case when all the operators are r…
Frame representations of qudit quantum mechanics
Nicolae Cotfas
There exist many attempts to define a Wigner function for qudits, each of them coming with its advantages and limitations. The existing finite versions have simple definitions, but…
Quantum states defined by using the finite frame quantization
Nicolae Cotfas
Finite frame quantization is a discrete version of the coherent state quantization. In the case of a quantum system with finite-dimensional Hilbert space, the finite frame quantiza…
Mixed discrete variable Gaussian states
Nicolae Cotfas
The quantum systems with finite-dimensional Hilbert space have several applications and are intensively explored theoretically and experimentally. The mathematical description of t…