activity
20162025
most citedAnalytic model of a multi-electron atom

10 citations · 22 across the 6 of their papers we have counts for

collaborators

7 papers

physics.bio-ph2025

X-ray resonance therapy with parametric X-ray radiation (PXR) for sulfur-containing tumor tissues

N. Q. San, O. D. Skoromnik, A. U. Leonau +2

We investigate the possibility of usage of the parametric X-ray radiation (PXR) for the selective therapy of superficial sulfur-containing tumor tissues. In these tissues, the conc…

quant-ph2024

Ground state of the gauge invariant Dicke model: condensation of the photons in non-classical states

N. Q. San, O. D. Skoromnik, A. P. Ulyanenkov +2

We investigate the ground state of two physically motivated modifications of the Dicke model. The first modification corresponds to particles whose phase space contains only two st…

quant-ph2022★ 2 cited

Eigenstates of two-level systems in a single-mode quantum field: from quantum Rabi model to -atom Dicke model

A. U. Leonau, N. Q. San, A. P. Ulyanenkov +2

In the present paper we show that the Hamiltonian describing the resonant interaction of two-level systems with a single-mode electromagnetic quantum field in the Coulomb gauge…

quant-ph2020★ 6 cited

Radiation induced interaction potential of two qubits strongly coupled with a quantized electromagnetic field

I. D. Feranchuk, N. Q. San, A. U. Leonau +1

We investigate the interaction of two two-level qubits with a single mode quantum field in a cavity without rotating wave approximation and considering that qubits can be located a…

quant-ph2020

Exact solution for the quantum Rabi model with the term

I. D. Feranchuk, N. Q. San, A. U. Leonau +1

Quantum Rabi model (QRM) is widely used for the analysis of the radiation-matter interaction at the fundamental level in cavity quantum electrodynamics. Typically the QRM Hamiltoni…

quant-ph2017★ 10 cited

Analytic model of a multi-electron atom

O. D. Skoromnik, I. D. Feranchuk, A. U. Leonau +1

A fully analytical approximation for the observable characteristics of many-electron atoms is developed via a complete and orthonormal hydrogen-like basis with a single-effective c…

quant-ph2016★ 4 cited

Spontaneous emission in a quantum system driven by the resonant field beyond the rotating wave approximation

I. D. Feranchuk, A. U. Leonau, M. M. Eskandari

Quasi-stationary states of the quantum system in the driving resonant field are considered without rotating wave approximation. Conditions under which the spontaneous emission coul…