4 papers
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…
Discrete phase symmetry of stationary states in bichromatically pumped Kerr microresonators
Boulat Nougmanov
Bichromatically pumped Kerr microresonators exhibit phase bistability and multistability arising from four-wave mixing between pump and generated modes. Here we analyze the symmetr…
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 intera…
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…