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News and Research Highlights
Dark excitons lighten up in a magnetic field19 Jul 2022, 18:00
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 Amplifier11 May 2022, 0:00
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 superconducting22 Apr 2022, 17:49
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 technology22 Apr 2022, 17:49
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.
Exchange-split multiple Rydberg series of excitons in anisotropic quasi two-dimensional ReS
Phase diffusion and noise temperature of a microwave amplifier based on single unshunted Josephson junction
Subgap states spectroscopy in a quantum dot coupled to gapped hosts: Unified picture for superconductor and semiconductor bands