Mohamed Boubakour                                              Graduated 2024

Control of Cold Atomic Systems for Quantum Heat Engines


  • Dynamical invariant based shortcut to equilibration
    M Boubakour, S Endo, T Fogarty, T Busch
  • Interaction enhanced quantum heat engine
    Mohamed Boubakour, Thomás Fogarty, and Thomas Busch
    Phys. Rev. Research 5, 013088 (2023)



Friederike Metz                                                             Graduated 2022

Machine Learning Applications for the Study and Control of Quantum Systems

  • Two-leg ladder Bose Hubbard models with staggered fluxes
    Rashi Sachdeva, Friederike Metz, Manpreet Singh, Tapan Mishra, Thomas Busch
    Phys. Rev. A 98, 06361 (2018).
  • Universal and optimal coin sequences for high entanglement generation in 1D discrete time quantum walks
    A. Gratsea, F. Metz, and Th. Busch
    J. Phys. A: Math. Theor. 53 44530 (2020).
  • Deep-learning-based quantum vortex detection in atomic Bose–Einstein condensates
    Friederike Metz, Juan Polo, Natalya Weber and Thomas Busch
    Mach. Learn.: Sci. Technol. 2 035019 (2021)
  • Variational quantum anomaly detection: Unsupervised mapping of phase diagrams on a physical quantum computer
    Korbinian Kottmann, Friederike Metz, Joana Fraxanet, Niccolo Baldelli
    Phys. Rev. Research 3, 043184 (2021)
  • Self-Correcting Quantum Many-Body Control using Reinforcement Learning with Tensor Networks
    Friederike Metz, Marin Bukov
    arXiv:2201.11790 (2022)


Christopher Campbell                                               Graduated 2022

Supersymmetry and Nonequilibrium Quantum Dynamics

Life after OIST

Postdoctoral Researcher, NANOMO at Oulu University, Finland


Lewis Ruks                                                                     Graduated 2022

Wave Propagation and Light-Matter Interactions in Optical Nanofibers and Discrete Media

  • Fast control of interactions in an ultracold two atom system: Managing correlations and irreversibility
    Thomás Fogarty, Lewis Ruks, Jing Li, and Thomas Busch
    SciPost Phys. 6, 021 (2019).
  • Waveguide-induced dispersion interaction between two two-level atoms with orthogonal in-transverse-plane dipoles
    F. Le Kien, L. Ruks, and Th. Busch,
    Appl. Phys. B 125, 205 (2019).
  • Coupling between guided modes of two parallel nanofibers
    Fam Le Kien, Lewis Ruks, Sile Nic Chormaic, Thomas Busch
    New J. Phys. 22 123007 (2020)
  • Spatial distributions of the fields in guided normal modes of two coupled parallel optical nanofibers
    Fam Le Kien, Lewis Ruks, Sile Nic Chormaic, Thomas Busch
    New J. Phys. 23 043006 (2021).
  • Green's functions of and emission into discrete anisotropic and hyperbolic baths
    L. Ruks and Th. Busch
    Phys. Rev. Research 4, 023044 (2022)
  • Understanding and Improving Critical Metrology. Quenching Superradiant Light-Matter Systems Beyond the Critical Point
    Karol Gietka, Lewis Ruks, and Thomas Busch
    Quantum 6, 700 (2022)
Life after OIST

Research Associate, NTT Basic Research Laboratories, Japan


Tim Keller                                                                     Graduated 2022

Controlling Superfluid and Insulating States in Interacting Quantum Gases

  • A Feshbach engine in the Thomas-Fermi regime
    T. Keller, T. Fogarty, J. Li, and Th. Busch
    Phys. Rev. Research 2, 033335 (2020).
  • Self-Pinning Transition of a Tonks-Girardeau Gas in a Bose-Einstein Condensate
    Tim Keller, Thomás Fogarty, and Thomas Busch
    Phys. Rev. Lett. 128, 053401 (2022). Editors' Suggestion
  • Fermionization of a Few-Body Bose Gas Immersed into a Bose-Einstein Condensate
    Tim Keller, Thomás Fogarty, Thomas Buschar
    Xiv:2302.01743 (2023)
Life after OIST

Postdoctoral Researcher, Waseda University, Japan


Seyedeh Sahar Seyed Hejazi                                           Graduated 2021

Atom-Light Interactions via Evanescent Fields

  • Channeling of spontaneous emission from an atom into the fundamental and higher-order modes of a vacuum-clad ultrathin optical fiber
    Fam Le Kien, S. Sahar S. Hejazi, Thomas Busch, Viet Giang Truong, and Síle Nic Chormaic
    Phys. Rev. A 96, 043859 (2017)
  • Chiral force of guided light on an atom
    Fam Le Kien, S. Sahar S. Hejazi, Viet Giang Truong, Síle Nic Chormaic, and Thomas Busch
    Phys. Rev. A 97, 063849 (2018)
  • Force of light on a two-level atom near an ultrathin optical fiber
    Fam Le Kien, D F Kornovan, S Sahar S Hejazi, Viet Giang Truong, M I Petrov, Sile Nic Chormaic, Thomas Busch
    New J. Phys. 20, 093031 (2018)
  • Symmetry breaking in binary Bose-Einstein condensates in the presence of an inhomogeneous artificial gauge field
    S. Sahar S. Hejazi, Juan Polo, Rashi Sachdeva, Thomas Busch
    Phys. Rev. A 102, 053309 (2020)
Life after OIST

Postdoctoral Researcher, Osaka City University, Japan


Mathias Mikkelsen                                                       Graduated 2021

Quenched and Driven Dynamics of One-Dimensional Quantum Systems

Life after OIST

Postdoctoral Researcher, Kindai University, Japan



Ayaka Usui                                                                  Graduated 2021

Control and measurement of non-classical properties of cold atomic and optical systems

  • Dynamical phase transitions and temporal orthogonality in one-dimensional hard-core bosons: from the continuum to the lattice
    Thomás Fogarty, Ayaka Usui, Thomas Busch, Alessandro Silva, and John Goold
    New J. Phys. 19, 113018 (2017)
  • Static and dynamic phases of a Tonks-Girardeau gas in an optical lattice
    A Usui, B Buča and J Mur-Petit
    New J. Phys. 20, 103006 (2018).
  • Spin-orbit coupling in the presence of strong atomic correlations
    A. Usui, T. Fogarty, S. Campbell, S.A. Gardiner, and Th. Busch
    New J. Phys. 22, 013050 (2020).
  • Bayesian parameter estimation using Gaussian states and measurements
    Simon Morelli, Ayaka Usui, Elizabeth Agudelo, Nicolai Friis
    Quantum Sci. Technol. 6 025018 (2021)
  • Simulating the same physics with two distinct Hamiltonians
    Karol Gietka, Ayaka Usui, Jianqiao Deng, Thomas Busch
    Phys. Rev. Lett. 126, 160402 (2021)
Life after OIST

Postdoctoral Researcher, Universiy of Barcelona, Spain

James Schloss                                                                 Graduated 2019

Massively parallel split-step Fourier techniques for simulating quantum systems on graphics processing units

Life after OIST

Postdoctoral Research Associate,  Massachusetts Institute of Technology (USA)

Jiabao Chen                                                                Graduated 2019

Coherent control of charged particle systems strongly interacting with microwave photons 

  • Strong coupling of a two-dimensional electron ensemble to a single-mode cavity resonators
    Jiabao Chen, A. A. Zadorozhko, and D. Konstantinov
    Phys. Rev. B 98, 235418(2018)
  • Adiabatic preparation of squeezed states of oscillators and large spin systems coupled to a two-level system
    Jiabao Chen, Denis Konstantinov, and Klaus Mølmer
    Phys. Rev. A 99, 013803
Life after OIST

Quantum Computing Software Engineer, QunaSys (Japan)


Irina Reshodko                                                             Graduated 2019

State engineering in one-dimensional quantum gases 

  • Robust boson dispenser: Quantum state preparation in interacting many-particle systems
    Irina Reshodko, Albert Benseny, and Thomas Busch
    Phys. Rev. A 96, 023606 (2017)
  • Entanglement in Spatial Adiabatic Processes for Interacting Atoms
    Albert Benseny, Irina Reshodko, and Thomas Busch
    Few-Body Syst.  59, 48 (2018)
  • Topological states in the Kronig-Penney model with arbitrary scattering potentials
    Irina Reshodko, Albert Benseny, Judit Romhányi, Thomas Busch

    New. J. Phys. 21,  013010 (2019).
Life after OIST

Artificial Intelligence Researcher / Software Developer, WAY (Norway)

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Lee O'Riordan                                                             Graduated 2017

Non-equilibrium vortex dynamics in rapidly rotating Bose-Einstein condensates  

Life after OIST

Postdoctoral Research Fellow, Lawrence Berkeley National Laboratory (USA)