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pro vyhledávání: '"Ohnmacht, David Christian"'
Recent experimental advancements in dissipation control have yielded significant insights into non-hermitian Hamiltonians for open quantum systems. Of particular interest are the topological characteristics exhibited by these non-hermitian systems, t
Externí odkaz:
http://arxiv.org/abs/2408.01289
Autor:
Ohnmacht, David Christian, Cuevas, Juan Carlos, Belzig, Wolfgang, López, Rosa, Lim, Jong Soo, Kim, Kun Woo
Quantum conductors attached to metallic reservoirs have been demonstrated to overcome the thermodynamic uncertainty relation (TUR), a trade-off relation between the amount of dissipation and the absence of charge and heat current fluctuations. Here,
Externí odkaz:
http://arxiv.org/abs/2408.01281
Autor:
Ohnmacht, David Christian, Coraiola, Marco, García-Esteban, Juan José, Sabonis, Deividas, Nichele, Fabrizio, Belzig, Wolfgang, Cuevas, Juan Carlos
Publikováno v:
Physical Review B 109, L241407 (2024)
We investigate the detection of quartets in hybrid multiterminal Josephson junctions. Using simple models of quantum dots coupled to superconducting leads, we find that quartets are ubiquitous and show how to rigorously extract their contribution to
Externí odkaz:
http://arxiv.org/abs/2311.18544
Autor:
Rey, Laura Sobral, Ohnmacht, David Christian, Winkelmann, Clemens B., Siewert, Jens, Belzig, Wolfgang, Scheer, Elke
We study the interplay between Coulomb blockade and superconductivity in a tunable superconductor-superconductor-normal metal single-electron transistor. The device is realized by connecting the superconducting island via an oxide barrier to the norm
Externí odkaz:
http://arxiv.org/abs/2306.05758
Publikováno v:
Phys. Rev. Research 5, 033176 (2023)
With the help of scanning tunneling microscopy (STM) it has become possible to address single magnetic impurities on superconducting surfaces and to investigate the peculiar properties of the in-gap states known as Yu-Shiba-Rusinov (YSR) states. Howe
Externí odkaz:
http://arxiv.org/abs/2305.04758
Akademický článek
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Autor:
Sobral Rey L; Physics Department, University of Konstanz, 78457 Konstanz, Germany., Ohnmacht DC; Physics Department, University of Konstanz, 78457 Konstanz, Germany., Winkelmann CB; Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France., Siewert J; University of the Basque Country UPV/EHU and EHU Quantum Center, 48080 Bilbao, Spain.; Ikerbasque, Basque Foundation for Science, 48009 Bilbao, Spain., Belzig W; Physics Department, University of Konstanz, 78457 Konstanz, Germany., Scheer E; Physics Department, University of Konstanz, 78457 Konstanz, Germany.
Publikováno v:
Physical review letters [Phys Rev Lett] 2024 Feb 02; Vol. 132 (5), pp. 057001.