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21 papers · 2 filters
Quantum spatial dynamics of high-gain parametric down-conversion accompanied by cascaded up-conversion
A. V. Rasputnyi, D. A. Kopylov
Quantum cascaded up-conversion (CUpC) of parametric down conversion (PDC) in a finite nonlinear -crystal is studied theoretically within parametric approximation. The exac…
Dark-state and loss-induced phenomena in the quantum-optical regime of -type three-level systems
H. Rose, D. V. Popolitova, O. V. Tikhonova +2
The interaction of matter with quantum light leads to phenomena which cannot be explained by semiclassical approaches. Of particular interest are states with broad photon number di…
Many-spin entanglement in multiple quantum NMR with a dipolar ordered initial state
Ilia D. Lazarev, Edward. B. Feldman
Multiple quantum (MQ) NMR with a dipolar ordered initial state opens new possibilities for the exploration of many-spin entanglement. In this paper, we investigate many-spin entang…
Azimuthal eigenmodes at strongly non-degenerate parametric down-conversion
Lev S. Dvernik, Pavel A. Prudkovskii
Quantum-optical technologies based on parametric light down-conversion are not yet applied in the terahertz frequency range. This is owing to the complexity of detecting single pho…
Variational Simulation of Schwinger's Hamiltonian with Polarisation Qubits
O. V. Borzenkova, G. I. Struchalin, A. S. Kardashin +5
The numerical emulation of quantum physics and quantum chemistry often involves an intractable number of degrees of freedom and admits no known approximation in general form. In pr…
Hybrid quantum-classical unsupervised data clustering based on the self-organizing feature map
Ilia D. Lazarev, Marek Narozniak, Tim Byrnes +1
Unsupervised machine learning is one of the main techniques employed in artificial intelligence. We introduce an algorithm for quantum-assisted unsupervised data clustering using t…