collaborators

9 papers

cond-mat.mes-hall2026

Assessing the classicality of photon echo from excitons in lead halide perovskite nanocrystals

George Alkhalil, Hendrik Rose, Artur V. Trifonov +9

Photon echo (PE) spectroscopy is a powerful technique for probing decoherence mechanisms and charge carrier dynamics in semiconductor systems. Beyond traditional coherence measurem…

quant-ph2026

Gain-induced spectral non-degeneracy in type-II parametric down-conversion

Behnood Taheri, Denis Kopylov, Manfred Hammer +3

We demonstrate the novel effect of gain-induced spectral shifts in the type-II parametric down-conversion (PDC) process, which results in a transition from degenerate to non-degene…

quant-ph2026

Measurement-induced cubic phase state generation

Harsh Kashyap, Denis A. Kopylov, Polina R. Sharapova

The cubic phase state constitutes a nonlinear resource that is essential for universal quantum computing protocols. However, constructing such non-classical states faces many chall…

quant-ph2025

Bipartite entanglement extracted from multimode squeezed light generated in lossy waveguides

Denis A. Kopylov, Torsten Meier, Polina R. Sharapova

Entangled two-mode Gaussian states constitute an important building block for continuous variable quantum computing and communication protocols. In this work, we theoretically stud…

quant-ph2025

Amplified quantum non-demolition measurements of optical quadratures using quadratic nonlinearity

D. I. Salykina, V. S. Liamin, P. R. Sharapova +1

Quantum non-demolition (QND) measurement is a special technique that allows to evade quantum back-action. In this paper, we propose a new QND measurement scheme of the optical fiel…

quant-ph2025

Multiphoton, multimode state classification for nonlinear optical circuits

Denis A. Kopylov, Christian Offen, Laura Ares +5

We introduce a new classification of multimode states with a fixed number of photons. This classification is based on the factorizability of homogeneous multivariate polynomials an…