Oleg Lychkovskiy

Oleg Lychkovskiy

Senior Research Scientist
Center for Engineering Physics

Oleg graduated from the Moscow Institute of Physics and Technology in 2006, and received Candidate of Sciences (PhD) degree from the Institute for Theoretical and Experimental Physics (ITEP) in 2009.  His early research focused on the theoretical physics of elementary particles and fields and on the astroparticle physics.  In 2012, he moved from ITEP  to the Lancaster University, UK, to work as a Senior Research Associate on the far-from-equilibrium quantum dynamics of an impurity particle in a one-dimensional quantum fluid. In 2017-2018 he worked as a researcher in the Many-body Theory Group of the Russian Quantum Center (RQC). Apart from the many-body theory, he was engaged in the practical implementation of the quantum cryptography, in a joint project with the Steklov Mathematical Institute and DEPHAN LLC. In 2017 he moved to Skoltech to continue the research on quantum many-body theory. In June 2017 his project “Quantum adiabaticity in many-body systems” was supported by a 3-year grant of the Russian Science Foundation (extended for two more years in 2020). In 2018 he acquired a 2-year grant from the Russian Foundation for Basic Research to develop a project “Far-from-equilibrium dynamics in quantum impurity models”. In 2022 he won a “Junior Leader” grant from the BASIS foundation with the project “Quantum dynamics of integrable many-body systems”.

Topics

  • Quantum many-body dynamics
  • Quantum adiabaticity in many-body systems
  • Quantum transport
  • Quantum algorithms
  • Thermalization of quantum systems
  • Decoherence and quantum-to-classical transition

 

Ongoing projects and grants

  •  “Junior Leader” grant, BASIS Foundation, project “Quantum dynamics of integrable many-body systems”

Past projects and grants

  • Russian Science Foundation grant No 17-71-20158, project “Quantum adiabaticity in many-body systems”
  • Russian Foundation for Basic Research grant No 18-32-20218, project “Far-from-equilibrium dynamics in quantum impurity models”
  • Russian Foundation for Basic Research grant No 16-32-00669, project “Quantum dynamics of a mobile impurity in a medium”

Selected talks

Exact quantum dynamics in nonintegrable dissipative XX models, talk at the Workshop on exactly solvable models of open quantum systems (video available)

Dynamics of quantum integrable systems via coupled Heisenberg equations: models with Onsager algebra and more, talk at the workshop Exactly solvable models and algebras

Dynamics of quantum integrable models via coupled Heisenberg equations, talk at the Skoltech Center for Advanced Studied Seminar

Quantum transport far from equilibrium: exactly solvable models and beyond  at the International Scientific Youth Forum “Lomonosov-2021“ (video available)

Quantum speed limit for thermal states at Moscow Institute of Physics and Tecnology

Adiabatic dynamics of quantum many-body systems at Lebedev Physical Institute

Non-diagonal problem Hamiltonian for adiabatic quantum computation at TU Delft

Quantum adiabaticity in many-body systems at  DICE-2018

Quench and adiabatic dynamics of a mobile impurity in a one-dimensional quantum fluid at  University of Geneva

 

 

 

 

For a complete list of publications see Google Scholar profile

Selected papers:

O. Gamayun, O. Lychkovskiy. Out-of-equilibrium dynamics of the Kitaev model on the Bethe lattice via
coupled Heisenberg equations // SciPost Phys. 12, 175 (2022).

N. Il’in, A. Aristova, O. Lychkovskiy. Adiabatic theorem for closed quantum systems initialized at finite
temperature. Phys. Rev. A 104, L030202 (2021).

O. Gamayun, A. Slobodeniuk, J.-S. Caux, O. Lychkovskiy. Nonequilibrium phase transition in transport through a driven quantum point contact. Phys. Rev. B 103, L041405 (2021).

O. Lychkovskiy. Closed hierarchy of Heisenberg equations in the quantum transverse-field Ising chain. SciPost Phys. 10, 124 (2021).

N. Il’in and O. Lychkovskiy. Quantum speed limit for thermal states. Phys. Rev. A 103, 062204 (2021).

O. Gamayun, O. Lychkovskiy, M. Zvonarev. Zero temperature momentum distribution of an impurity in one-dimensional Fermi and Tonks-Girardeau gases. SciPost Phys. 8, 053 (2020).

O. Gamayun, O. Lychkovskiy, J.-S. Caux. Fredholm determinants, full counting statistics and Loschmidt echo for domain wall profiles in one-dimensional free fermionic chains.  SciPost Phys. 8, 036 (2020).

V. V. Vyborova, O. Lychkovskiy, A. N. Rubtsov. Droplet formation in a one-dimensional system of attractive spinless fermions.  Phys. Rev. B 98, 235407 (2018).

Oleg Lychkovskiy, Boris V. Fine. Spin excitation spectrum of high-temperature cuprate superconductors from finite cluster simulations. J. Phys.: Condens. Matter 30, 405801 (2018).

Oleksandr Gamayun, Oleg Lychkovskiy, Evgeni Burovski, Matthew Malcomson, Vadim V. Cheianov, Mikhail B. Zvonarev. Impact of the injection protocol on an impurity’s stationary state. Phys. Rev. Lett. 120, 220605 (2018).

Oleg Lychkovskiy, Oleksandr Gamayun, Vadim Cheianov. Necessary and sufficient condition for quantum adiabaticity in a driven one-dimensional impurity-fluid system. Phys. Rev. B 98, 024307 (2018).

Nikolay Il’in, Elena Shpagina, Filipp Uskov, Oleg Lychkovskiy. Squaring parametrization of constrained and unconstrained sets of quantum states. J. Phys. A: Math. Theor. 51, 085301 (2018).

Oleg Lychkovskiy, Oleksandr Gamayun, Vadim Cheianov. Time scale for adiabaticity breakdown in driven many-body systems and orthogonality catastrophe. Phys. Rev. Lett. 119, 200401 (2017).

O. Lychkovskiy. Large quantum superpositions of a nanoparticle immersed in superfluid helium. Phys. Rev. B 93, 214517 (2016).

O. Lychkovskiy. Perpetual motion and driven dynamics of a mobile impurity in a quantum fluid. Phys. Rev. A 91, 040101 (Rapid Communications) (2015).

O. Gamayun, O. Lychkovskiy, and V. Cheianov. Kinetic theory for a mobile impurity in a degenerate Tonks-Girardeau gas. Phys. Rev. E 90, 032132 (2014).

E. Burovski, V. Cheianov, O. Gamayun, and O. Lychkovskiy. Momentum relaxation of a mobile impurity in a one-dimensional quantum gas. Phys. Rev. A 89, 041601 (Rapid Communications) (2014).

O. Lychkovskiy. Dependence of decoherence-assisted classicality on the way a system is partitioned into subsystems. Phys. Rev. A 87, 022112 (2013).

O. Lychkovskiy. Necessary condition for the thermalization of a quantum system coupled to a quantum bath. Phys. Rev. E 82, 011123 (2010).