4 papers · 1 filter
Energy levels of the second-harmonic Hamiltonian at large photon numbers
Boulat Nougmanov
We study the energy spectrum of the degenerate Hamiltonian describing second-harmonic generation and parametric down-conversion at large total excitation numbers. Owing t…
Optimal squeezing to minimize vulnerability to losses
Boulat Nougmanov
Non-Gaussian states, described by Wigner quasi-probability distribution taking negative values, are of great interest for various applications of quantum physics. It is known howev…
Heisenberg limit in phase measurements: the threshold detection approach
D. I. Salykina, V. S. Liamin, V. L. Gorshenin +2
The ultimate precision of phase estimation is limited by the Heisenberg scaling , where is a numerical prefactor and is the mean number of photons interact…
Effective algorithms for calculation of quasiprobability distributions of bright "banana'' states
Boulat Nougmanov
Non-Gaussian quantum states, described by negative valued Wigner functions, are important both for fundamental tests of quantum physics and for emerging quantum information technol…