News

Tachyons in Physical Review Letters

2022. February 24.

Faster-than-light particles? Loosen the definitions, and you'll find them! New paper from the researchers at the Department of Theoretical Physics, in Physical Review Letters.
 
Doru Sticlet, Balázs Dóra, Cătălin Paşcu Moca
Kubo formula for non-Hermitian systems and tachyon optical conductivity
Phys. Rev. Lett. 128, 016802 (2022).
 
tachion-png.png
Link: 
https://arxiv.org/abs/2104.02428

New paper in Carbon

2022. January 18.

BME Physics researchers report a new and efficient way to create nitrogen-vacancy centers in diamond using neutron irradiation. Published in Carbon. 
 
Ultrahigh nitrogen-vacancy center concentration in diamond
S. Kollarics, F. Simon, A. Bojtor, K. Koltai, G. Klujber, M. Szieberth, B. G. Márkus, D. Beke, K. Kamarás, A. Gali, D. Amirari, R. Berry, S. Boucher, D. Gavryushkin, G. Jeschke, J. P. Cleveland, S. Takahashi, P. Szirmai, L. Forró, E. Emmanouilidou, R. Singh, K. Holczer
Carbon 188, p. 393 (2022).
https://www.sciencedirect.com/science/article/pii/S000862232101191X
 
Link: 
https://www.sciencedirect.com/science/article/pii/S000862232101191X

Student's Research Conference

2021. December 05.

BME Physics students showcased their research on November 16, at the virtual Student's Research Conference of the Faculty of Sciences.

 

Results: https://tdk.bme.hu/TTK

 

1st prizes in Physics:

 

  • Anna KRASZNAI
    Non-equilibrium dynamics of quantum spin chains
    Supervisor: Gábor Takács
  • Áron MÁRTON
    Quantum error correction in the surface code -- Coherent errors and readout errors
    Supervisor: János Asbóth
  • Bercel BOLDIS
    Study of dual entanglement patterns of BTZ black holes using cluster algebras
    Supervisor: Péter Lévay
  • Dominik JAKAB
    Ensemble quantum bits: realization and magnetic resonance experiments
    Supervisors: Ferenc Simon and Gábor Csősz
Link: 
https://tdk.bme.hu/TTK

BME Best Publication Prize 2020

2021. November 23.

Paper from the collaboration between the Quantum Electronics group and the Exotic Quantum Phases group was awarded the Best Publication Prize of the university.

 

Z Scherübl, G Fülöp, CP Moca, J Gramich, A Baumgartner, P Makk, T Elalaily, C Schönenberger, J Nygård, G Zaránd, Sz Csonka
Large spatial extension of the zero-energy Yu-Shiba-Rusinov state in magnetic field
Nat. Comms. 11 1834 (2020)
https://doi.org/10.1038/s41467-020-15322-9
Link: 
https://www.bme.hu/hirek/20211112/Az_oktatas_a_kutatas_a_fejlesztes_az_innovacio_kez_a_kezben_jar_a_Muegyetemen

Superconducting switch from a nanowire

2021. November 23.

Novel gate-tunable superconductor-based circuit element created and studied by the BME Quantum Electronics Research Group. Publication in Nano Letters.

 

Tosson Elalaily, Olivér Kürtössy, Zoltán Scherübl, Martin Berke, Gergö Fülöp, István Endre Lukács, Thomas Kanne, Jesper Nygård, Kenji Watanabe, Takashi Taniguchi, Péter Makk, and Szabolcs Csonka
Gate-Controlled Supercurrent in Epitaxial Al/InAs Nanowires
Nano Letters (2021)
 
Link: 
https://pubs.acs.org/doi/abs/10.1021/acs.nanolett.1c03493

Kondo cloud in superconductors

2021. November 10.

New theory results from BME on the electronic states forming around magnetic impurities in superconductors. Published as Editor's Suggestion in Physical Review Letters, and featured as a Synopsis in APS Physics.

 
Cătălin Paşcu Moca, Ireneusz Weymann, Miklós Antal Werner, and Gergely Zaránd
Kondo Cloud in a Superconductor
Phys. Rev. Lett. 127, 186804 – Published 27 October 2021
https://doi.org/10.1103/PhysRevLett.127.186804
 
 
 
Link: 
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.127.186804

Electromechanics in graphene

2021. November 02.

How and why does the resistance of a graphene nanostructure change, when placed in a pressure cell?

 

Researchers of the BME Quantum Electronics group, along with colleagues at ETH Zürich, address this question in their recent experiment. Two bilayer graphene flakes are pushed against each other in a twisted fashion, akin to recent breakthrough experiments discovering superconductivity in similar samples. The team measured the resistance of the nanostructure as function of pressure and temperature; this allowed to infer key features of the electronic band structure as well. The results are publised in Nano Letters. 

 

Bálint Szentpéteri, Peter Rickhaus, Folkert K. de Vries, Albin Márffy, Bálint Fülöp, Endre Tóvári, Kenji Watanabe, Takashi Taniguchi, Andor Kormányos, Szabolcs Csonka, and Péter Makk
Tailoring the Band Structure of Twisted Double Bilayer Graphene with Pressure
Nano Lett. 2021, 21, 20, 8777 (2021)
https://doi.org/10.1021/acs.nanolett.1c03066

 

Link: 
https://pubs.acs.org/doi/abs/10.1021/acs.nanolett.1c03066

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