Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Chevallier, Denis"'
Publikováno v:
Phys. Rev. A 101, 063604 (2020)
We compute the fluctuations of the number of bosons with a given momentum for the Tonks-Girardeau gas at zero temperature. We show that correlations between opposite momenta, which is an important fingerprint of long range order in weakly interacting
Externí odkaz:
http://arxiv.org/abs/2003.05868
Publikováno v:
Phys. Rev. Research 2, 023197 (2020)
We study a double-nanowire setup proximity coupled to an $s$-wave superconductor and search for the bulk signatures of the topological phase transition that can be observed experimentally, for example, with an STM tip. Three bulk quantities, namely,
Externí odkaz:
http://arxiv.org/abs/2001.05470
Publikováno v:
Phys. Rev. B 98, 245407 (2018)
We study an analytical model of a Rashba nanowire that is partially covered by and coupled to a thin superconducting layer, where the uncovered region of the nanowire forms a quantum dot. We find that, even if there is no topological superconducting
Externí odkaz:
http://arxiv.org/abs/1810.09840
Publikováno v:
Phys. Rev. B 98, 165403 (2018)
We study analytically and numerically the renormalization of the $g$-factor in semiconducting Rashba nanowires (NWs), consisting of a normal and superconducting section. If the potential barrier between the sections is high, a quantum dot (QD) is for
Externí odkaz:
http://arxiv.org/abs/1806.06842
Publikováno v:
Phys. Rev. B 97, 045404 (2018)
We study theoretically the detection of the topological phase transition occurring in Rashba nanowires with proximity-induced superconductivity using a quantum dot. The bulk states lowest in energy of such a nanowire have a spin polarization parallel
Externí odkaz:
http://arxiv.org/abs/1710.05576
Publikováno v:
Phys. Rev. B 96, 115413 (2017)
We compute various current correlation functions of electrons flowing from a topological nanowire to the tip of a superconducting scanning tunnel microscope and identify fingerprints of a Majorana bound state. In particular, the spin resolved cross-c
Externí odkaz:
http://arxiv.org/abs/1706.04838
Publikováno v:
Phys. Rev. B 96, 045440 (2017)
Considering Rashba quantum wires with a proximity-induced superconducting gap as physical realizations of Majorana fermions and quantum dots, we calculate the overlap of the Majorana wave functions with the local wave functions on the dot. We determi
Externí odkaz:
http://arxiv.org/abs/1705.03002
Publikováno v:
Phys. Rev. B 96, 041401 (2017)
We consider a Rashba nanowire with proximity gap which can be brought into the topological phase by tuning external magnetic field or chemical potential. We study spin and charge of the bulk quasiparticle states when passing through the topological t
Externí odkaz:
http://arxiv.org/abs/1703.00265
Autor:
Chevallier, Denis, Klinovaja, Jelena
Publikováno v:
Phys. Rev. B 94, 035417 (2016)
We investigate numerically the possibility to detect the spatial profile of Majorana fermions (MFs) modeling STM tips that are made of either normal or superconducting material. In both cases, we are able to resolve the localization length and the os
Externí odkaz:
http://arxiv.org/abs/1604.05724
Autor:
Chevallier, Denis
Un conducteur est bien caractérisé par sa conductance donnée par la formule de Landauer. Toutefois, le bruit contient davantage d'informations. Il mesure les fluctuations temporelles du courant autour de sa valeur moyenne. De plus, le signe des co
Externí odkaz:
http://www.theses.fr/2011AIX22073/document