Oslo Metropolitan University > Department of Computer Science
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Research interests

  • ac-driven nonequilibrium transport [46]

    Some of our classical models [15, 26 28] have been tested with cold atoms by the group of Ferruccio Renzoni

    Our proposal for ac-driven quantum ratchets with ultracold atoms (BEC) [23, 24] has been realized by the group of Martin Weitz [Science 326, 1241 (2009)]. They observed a whole spectrum of theoretically predicted effects and thus demarcated their quantum ratchet from classical ones.

    We have demonstrated, both theoretically (Augsburg) and experimentally (Bonn), that the mobility of a BEC in an ac-driven optical potential can be tuned by modifing the Floquet spectrum of the system.

    The Bonn group succeed in experimental detection and control of the peculiar 'Floquet resonances' predicted in our theoretical paper.

    Here you can see the results of some experiments on ac-driven quantum ratchets I have performed under the supervision of Christopher Grossert in the Bonn lab (to be more precise, I was allowed to click the buttons). The time-of-flight measurements reveal velocity distribution of a BEC cloud after the exposition to an ac-driven optical lattice potential.

  • Open quantum systems and Dissipative Quantum Chaos

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    Dissipative Quantum Chaos is an emerging theory that addresses open quantum many-body systems; its agenda is to quantify generic properties of the dissipative quantum evolution and provide a toolbox to sort the systems into "chaotic" and "regular" ones. Another words, it is an idea to generalize to open (dissipative) quantum systems the concept known as Quantum Chaos Theory (which addresses unitary (Hamiltonian) quantum evolution).

    It is hard to describe this topic in a few words, it is rather a vision [see the outline of a recently organized workshops (2017, 2022)]. We have made some steps in [76, 88, 64].

    We believe that Dissipative Quantum Chaos is a framework which can be used to test and control the current generation of Noisy Intermediate-Scale Quantum (NOS) computers. This is the core idea of the DQUANT project.

  • Computational Quantum Physics

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  • Many-body Floquet states of strongly-driven systems: numerical methods and algorithms [56, 66, 69]

  • Open quantum systems: asymptotic nonequilibrium states ('quantum attractors') and relaxations towards them [57, 61]

  • Energy exchange between quantum systems and relaxation to equilibrium [33, 35, 39].

  • Lévy walks, complex transport and biodynamics

    Das ist ein Bild Lévy walks are a specific type of random walks which found applications in diverse research corners ranging from quantum physics and chaotic dynamics to ecology, cellular biophysics and robotics. Currently, we are trying to apply this concept to biological transport, transport phenomena in two- and three-dimensional spaces, and optimal search theory. On these subjects I enjoy collaboration [36, 43, 46, 50, 60] with V. Zaburdaev (University of Erlangen-Nuremberg, Germany) and E. Barkai (Bar-Ilan University, Israel).

  • Teaching Quantum Computing to IT students

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    Quantum computing (QC) is no longer a mere academic subject but also one of the fastest growing IT sectors. It is a perspective job market for IT specialists, and we are already witnessing a situation when the demand for experts both in IT and computer science (CS) and QC exceeds the offer.

    We think that the way QC is taught currently should be revised. Our hypothesis is that IT/CS students can be led directly to the field of QC without prior knowledge of quantum mechanics. Our course on Quantum Information Technology is a blend of basics of Qauntum Mechanics, QC theory, and a practial coding, by using online cloud platoforms such as IBM Quantum Experience and D-Wave's Leap. We also use our two- and three-qubit quantum computers based on the NMR technology, Hugin and Munin (see Hugin on the left).

[Oslo Metropolitan University] [TKD] [Department of Computer Science]
last modified on Wednesday, 06-Apr-2022 07:31:54 UTC by Sergey Denisov