Zobrazeno 1 - 10
of 225
pro vyhledávání: '"Beri, B."'
Publikováno v:
Phys. Rev. Research 2, 043412 (2020)
We numerically study coherent errors in surface codes on planar graphs, focusing on noise of the form of $Z$- or $X$-rotations of individual qubits. We find that, similarly to the case of incoherent bit- and phase-flips, a trade-off between resilienc
Externí odkaz:
http://arxiv.org/abs/2006.13055
Autor:
Latief, A., Béri, B.
Publikováno v:
Phys. Rev. B 98, 205427 (2018)
The topological Kondo effect arises when conduction electrons in metallic leads are coupled to a mesoscopic superconducting island with Majorana fermions. Working with its minimal setup, we study the lead electron local tunneling density of states in
Externí odkaz:
http://arxiv.org/abs/1803.10565
Autor:
Béri, B.
Publikováno v:
Phys. Rev. Lett. 119, 027701 (2017)
A leading candidate for experimental confirmation of the non-local quantum dynamics of Majorana fermions is the topological Kondo effect, predicted for mesoscopic superconducting islands connected to metallic leads. We identify an anisotropic, Toulou
Externí odkaz:
http://arxiv.org/abs/1610.03064
Autor:
Mellars, E. A., Béri, B.
Publikováno v:
Phys. Rev. B 94, 174508 (2016)
For Josephson junctions based on s-wave superconductors, time-reversal symmetry is known to allow for powerful relations between the normal-state junction properties, the excitation spectrum, and the Josephson current. Here we provide analogous relat
Externí odkaz:
http://arxiv.org/abs/1607.05730
Publikováno v:
J. Phys. A. 47, 265001 (2014)
Conduction electrons coupled to a mesoscopic superconducting island hosting Majorana bound states have been shown to display a topological Kondo effect with robust non-Fermi liquid correlations. With $M$ bound states coupled to $M$ leads, this is an
Externí odkaz:
http://arxiv.org/abs/1403.0113
Publikováno v:
Phys. Rev. Lett. 113, 076401 (2014)
We study the multi-channel Kondo impurity dynamics realized in a mesoscopic superconducting island connected to metallic leads. The effective 'impurity spin' is non-locally realized by Majorana bound states and strongly coupled to lead electrons by n
Externí odkaz:
http://arxiv.org/abs/1312.3802
Autor:
Béri, B.
Publikováno v:
Phys. Rev. Lett. 110, 216803 (2013)
We present a powerful and general approach to describe the coupling of Majorana fermions to external leads, of interacting or non-interacting electrons. Our picture has the Klein factors of bosonization appearing as extra Majoranas hybridizing with t
Externí odkaz:
http://arxiv.org/abs/1212.4465
Autor:
Béri, B., Cooper, N. R.
Publikováno v:
Phys. Rev. Lett. 109, 156803 (2012)
The Kondo effect is a striking consequence of the coupling of itinerant electrons to a quantum spin with degenerate energy levels. While degeneracies are commonly thought to arise from symmetries or fine-tuning of parameters, the recent emergence of
Externí odkaz:
http://arxiv.org/abs/1206.2224
Publikováno v:
Phys. Rev. B 86, 054505 (2012)
Two-dimensional superconductors with time-reversal symmetry have a Z_2 topological invariant, that distinguishes phases with and without helical Majorana edge states. We study the topological phase transition in a class-DIII network model, and show t
Externí odkaz:
http://arxiv.org/abs/1205.1441
Autor:
Béri, B., Cooper, N. R.
Publikováno v:
Phys. Rev. Lett. 108, 206804 (2012)
We discuss detection strategies for fractional topological insulators (FTIs) realizing time-reversal invariant analogues of fractional quantum Hall systems in the Laughlin universality class. Focusing on transport measurements, we study the effect of
Externí odkaz:
http://arxiv.org/abs/1112.3859