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A new class of pure non-Gaussian quantum states
V. L. Gorshenin, B. N. Nougmanov, D. A. Chermoshentsev, I. A. Bilenko, F. Ya. Khalili·July 13, 2026
Quantum Physics
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Abstract
We discuss a new class of pure non-Gaussian quantum states of light characterized by trigonal symmetry on the phase plane. We propose the term ``trigonal states'' for them and show that they can be generated using the standard non-degenerate four-wave process supplemented by the subsequent heralding measurement of the photon number in one of the two signal modes.