Zobrazeno 1 - 10
of 300
pro vyhledávání: '"Hassler, F."'
Publikováno v:
Phys. Rev. Lett. 129, 086601 (2022)
Physically, one tends to think of non-Hermitian systems in terms of gain and loss: the decay or amplification of a mode is given by the imaginary part of its energy. Here, we introduce an alternative avenue to the realm of non-Hermitian physics, whic
Externí odkaz:
http://arxiv.org/abs/2111.02263
Autor:
Hassler, F., Grabsch, A., Pacholski, M. J., Oriekhov, D. O., Ovdat, O., Adagideli, I., Beenakker, C. W. J.
Publikováno v:
Phys. Rev. B 102, 045431 (2020)
A Josephson junction in a topological superconductor can inject a charge e/2 into a normal-metal contact, carried by chiral Majorana edge modes. Here we address the question whether this half-integer charge is a sharp observable, without quantum fluc
Externí odkaz:
http://arxiv.org/abs/2005.08655
Autor:
Banszerus, L., Frohn, B., Fabian, T., Somanchi, S., Epping, A., Müller, M., Neumaier, D., Watanabe, K., Taniguchi, T., Libisch, F., Beschoten, B., Hassler, F., Stampfer, C.
Publikováno v:
Phys. Rev. Lett. 124, 177701 (2020)
We report on measurements of quantized conductance in gate-defined quantum point contacts in bilayer graphene that allow the observation of subband splittings due to spin-orbit coupling. The size of this splitting can be tuned from 40 to 80 $\mu$eV b
Externí odkaz:
http://arxiv.org/abs/1911.13176
Publikováno v:
SciPost Phys. 8, 013 (2020)
A $2\pi$ phase shift across a Josephson junction in a topological superconductor injects vortices into the chiral edge modes at opposite ends of the junction. When two vortices are fused they transfer charge into a metal contact. We calculate the tim
Externí odkaz:
http://arxiv.org/abs/1907.02422
Publikováno v:
Phys. Rev. Lett. 121, 136803 (2018)
The law of reflection states that smooth surfaces reflect waves specularly, thereby acting as a mirror. This law is insensitive to disorder as long as its length scale is smaller than the wavelength. Monolayer graphene exhibits a linear dispersion at
Externí odkaz:
http://arxiv.org/abs/1804.04142
Akademický článek
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Publikováno v:
Phys. Rev. B 89, 165416 (2014)
We investigate the effect of quantum phase slips on a helical quantum wire coupled to a superconductor by proximity. The effective low-energy description of the wire is that of a Majorana chain minimally coupled to a dynamical $\mathbb{Z}_2$ gauge fi
Externí odkaz:
http://arxiv.org/abs/1401.3539
Publikováno v:
New J. Phys. 14, 035019 (2012)
We show how to exchange (braid) Majorana fermions in a network of superconducting nanowires by control over Coulomb interactions rather than tunneling. Even though Majorana fermions are charge-neutral quasiparticles (equal to their own antiparticle),
Externí odkaz:
http://arxiv.org/abs/1111.6001
Publikováno v:
Phys. Rev. B 84, 245447 (2011)
The conductance of a two-dimensional electron gas at the transition from one quantum Hall plateau to the next has sample-specific fluctuations as a function of magnetic field and Fermi energy. Here we identify a universal feature of these mesoscopic
Externí odkaz:
http://arxiv.org/abs/1110.4280
Publikováno v:
Phys. Rev. B 84, 180502(R) (2011)
The Josephson energy of two superconducting islands containing Majorana fermions is a 4\pi-periodic function of the superconducting phase difference. If the islands have a small capacitance, their ground state energy is governed by the competition of
Externí odkaz:
http://arxiv.org/abs/1108.1095