Moscow Institute of Physics and Technology

Theoretical nanophysics laboratory

Upcoming quantum-nanophysics seminars
Scientific Council of the Landau Institute, Friday, June 22, 2018, Landau Institute, 11:30 am

L. Glazman (Yale University)

Quantum Many-Body Physics of Qubits

The ongoing development of superconducting qubits has brought some basic questions of many-body physics to the research forefront, and in some cases helped solving them. I will address two effects in quantum condensed matter highlighted by the development of a fluxonium qubit. The first one is the so-called cosine-phi problem stemming from the seminal paper of Brian Josephson: the predicted there phase dependence of the dissipative current across a Josephson junction was observed in a fluxonium, after nearly 50 years of unsuccessful attempts by other techniques. The second one is the dynamics of a weakly-pinned charge density wave: we predict that the dynamics may be revealed in measurements of microwave reflection off a superinductor, which is a key element of the fluxonium.

Visiting address:

Laboratory building, room 122
Moscow Institute of Physics and Technology
Dolgoprudny, Russia

contact e-mail address: nanotheory@phystech.edu (head M.V.Feigel'man, deputy head I.V.Zagorodnev)

Research topics
  • Mesoscopic electronic systems
  • Superconducting hybrid structures
  • Quantum phase transitions
  • Spintronics
  • 2DEG and quantum Hall effect
  • Quantum magnetism and topological order
  • Physics of quantum computation
Recent quantum-nanophysics seminars
Theory seminar, Thursday, June 7, 2018, Kapitza Institute, 11:30 am

A.Yu. Kuntsevich (FIAN)

Elektronnye svoistva dopirovannykh khal'kogenidov vismuta

Khal'kogenidy vismuta yavlyayutsya topologicheskimi izolyatorami s naibol'shimi shirinami zapreshchennoi zony. Pri dopirovanii Bi2Se3 med'yu, strontsiem ili niobiem Bi2Se3 stanovitsya sverkhprovodyashchim (predpolozhitel'no, nematicheskim topologicheskim sverkhprovodnikom).

V doklade budet dan obzor imeyushchikhsya na segodnyashnii den' dannykh o nematicheskoi sverkhprovodimosti dannogo materiala, v tom chisle i nashi rezul'taty o korrelyatsii nematichnosti so strukturnymi iskazheniyami [arXiv:1801.09287].

Takzhe ya rasskazhu o chasto obsuzhdaemom v literature izmerenii fazy Berri iz magnitoostsillyatsii. Nami privedeny prostye makroskopicheskie argumenty [Phys. Rev. B 97, 195431 (2018)], pochemu v real'nykh topologicheskikh izolyatorakh eta faza mozhet sil'no otlichat'sya ot teoreticheski ozhidaemogo znacheniya.