News (14 Nov 2021 - 1 Nov 2022)
We welcome a new member of our group
Dr. Athanasios Koliogiorgos has joined our team in October. We wish him a creative and successful post-doctoctoral stay.
Dark excitons lighten up in a magnetic field
The luminescence spectrum of excitons in ReS2 resembles the transitions in a free atom (Rydberg series), except that some transitions are missing, they are “dark”. This is due to interactions, as detailed by the theoretical calculations of A. Slobodenyuk, and verified by measurements in magnetic fields.
Josephson Junction Amplifier
Josephson junctions can operate as amplifiers of rather weak signals coming from quantum technology. But how is the amplification affected by the very quantum zero-point fluctuations? We have addressed this question in a recent communication.
Electron pockets go superconducting
Room-temperature superconductivity is one of the holy grails of solid state physics. Our paper on the monolayer FeSe on Si(001) sheds light on a possible microscopic mechanism by which the transition temperature could increase.
Autonomous quantum technology
Quantum coherence is the essential resource of quantum technology. One of the challenges is if coherence is extractable by a coupling to an external system, provided that a back action from the extraction will not spoil this stimulating effect. We solved that problem for spin-boson and fermion-boson models and showed positively that such autonomous coherence is extractable. It opens further the door to its experimental investigation and stimulates ongoing research to make quantum technology more autonomous.
Tomáš Novotný became the head of the Department of condensed matter physics and therefore, as from the first of January, Karel Carva replaced him at the position of the head of our theoretical group. We congratulate both of them and wish them a lot of success in their new roles.
Panch Ram leaving the group
Dr. Panch Ram got a new position in the excellent group of Prof. W. Belzig (U. Konstanz). We wish him lots of success!
Article on the Kondo temperature featured on the faculty web
Kondo temperature is the main parameter that determines transport properties of magnetic molecules attached to metallic electrodes. We have resolved the ambiguity in the determination of this parameter in our recent paper, which is also featured on the faculty web
Alžběta’s successful PhD defense
Congratulations, Alžběta, for successfully defending her dissertation, titled "Quantum electronic transport in superconducting quantum dots”.