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Majorana bound states and non-local spin correlations in a quantum wire on an unconventional superconductor
Sho Nakosai, Jan Carl Budich, Yukio Tanaka +2
We study theoretically the proximity effect of a one-dimensional metallic quantum wire (in the absence of spin-orbit interaction) lying on top of an unconventional superconductor.…
Fluctuation driven topological Hund insulators
Jan Carl Budich, Björn Trauzettel, Giorgio Sangiovanni
We investigate the role of electron-electron interaction in a two-band Hubbard model based on the Bernevig-Hughes-Zhang Hamiltonian exhibiting the quantum spin Hall (QSH) effect. B…
From the adiabatic theorem of quantum mechanics to topological states of matter
Jan Carl Budich, Björn Trauzettel
Owing to the enormous interest the rapidly growing field of topological states of matter (TSM) has attracted in recent years, the main focus of this review is on the theoretical fo…
Entanglement of nanoelectromechanical oscillators by Cooper-pair tunneling
Stefan Walter, Jan Carl Budich, Jens Eisert +1
We demonstrate that entanglement of two macroscopic nanoelectromechanical resonators -- coupled to each other via a common detector, a tunnel junction -- can be generated by runnin…
Exact results for the Kondo screening cloud of two helical liquids
Thore Posske, Chao-Xing Liu, Jan Carl Budich +1
We analyze the screening of a magnetic quantum dot with spin 1/2 coupled to two helical liquids. Interestingly, we find two qualitatively different sets of Toulouse points, i.e., n…
~Green's function topology of Majorana wires
Jan Carl Budich, Björn Trauzettel
We represent the ~topological invariant characterizing a one dimensional topological superconductor using a Wess-Zumino-Witten dimensional extension. The invariant is…