Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Jens H Bardarson"'
Publikováno v:
New Journal of Physics, Vol 22, Iss 10, p 103042 (2020)
We provide an exact analytical technique to obtain within a lattice model the wave functions of the edge states in zigzag- and bearded-edge graphene, as well as of the Fermi-arc surface states in Weyl semimetals described by a minimal bulk model. We
Externí odkaz:
https://doaj.org/article/836b689cf19348e2b04977a1977baf05
Publikováno v:
Physical Review Research, Vol 6, Iss 3, p L032045 (2024)
While topology is a property of a quantum state itself, most existing methods for characterizing the topology of interacting phases of matter require direct knowledge of the underlying Hamiltonian. We offer an alternative by utilizing the one-particl
Externí odkaz:
https://doaj.org/article/354cd8b530a54fdca9228e2f1333a92e
Publikováno v:
New Journal of Physics, Vol 20, Iss 8, p 083032 (2018)
Entanglement has developed into an essential concept for the characterization of phases and phase transitions in ground states of quantum many-body systems. In this work we use the logarithmic negativity to study the spatial entanglement structure in
Externí odkaz:
https://doaj.org/article/67038579383444328c0eb53bbe10bfc1
Publikováno v:
New Journal of Physics, Vol 18, Iss 2, p 023046 (2016)
The many-body localization transition is a dynamical quantum phase transition between a localized and an extended phase. We study this transition in the XXZ model with disordered magnetic field and focus on the time evolution following a global quant
Externí odkaz:
https://doaj.org/article/a993df88d51140a0923f4ab0c6b8179b
Publikováno v:
New Journal of Physics, Vol 16, Iss 5, p 053007 (2014)
We consider Josephson junctions on surfaces of three dimensional topological insulator nanowires. We find that in the presence of a parallel magnetic field, short junctions on nanowires show signatures of a perfectly transmitted mode capable of suppo
Externí odkaz:
https://doaj.org/article/09d73f24d6a74f8d954adaf67246a226
Publikováno v:
SciPost Physics, Vol 13, Iss 4, p 080 (2022)
Quantum many-body dynamics generically results in increasing entanglement that eventually leads to thermalization of local observables. This makes the exact description of the dynamics complex despite the apparent simplicity of (high-temperature)
Externí odkaz:
https://doaj.org/article/bf21004986f44932bdcae9d119c746f2
Publikováno v:
Beilstein Journal of Nanotechnology, Vol 9, Iss 1, Pp 1156-1161 (2018)
In this paper we consider charge current generated by maintaining a temperature difference over a nanowire at zero voltage bias. For topological insulator nanowires in a perpendicular magnetic field the current can change sign as the temperature of o
Externí odkaz:
https://doaj.org/article/b44120303fb54df589bb43a9a08898af
Publikováno v:
SciPost Physics, Vol 10, Iss 5, p 102 (2021)
We show how the axial (chiral) anomaly induces a spin torque on the magnetization in magnetic Weyl semimetals. The anomaly produces an imbalance in left- and right-handed chirality carriers when non-orthogonal electric and magnetic fields are applied
Externí odkaz:
https://doaj.org/article/c2f232337556499aa42df2a11bb0678b
Autor:
Frank Arnold, Chandra Shekhar, Shu-Chun Wu, Yan Sun, Ricardo Donizeth dos Reis, Nitesh Kumar, Marcel Naumann, Mukkattu O. Ajeesh, Marcus Schmidt, Adolfo G. Grushin, Jens H. Bardarson, Michael Baenitz, Dmitry Sokolov, Horst Borrmann, Michael Nicklas, Claudia Felser, Elena Hassinger, Binghai Yan
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-7 (2016)
Magnetoresistance of topological semimetal shows unusual electron transport behaviour. Here, Arnold et al. demonstrate detailed Fermi surface topology of Weyl semimetal TaP and show that negative longitudinal magnetoresistance shows up without well-d
Externí odkaz:
https://doaj.org/article/a183598eeb3e4c778dbdc4492180945d
Publikováno v:
SciPost Physics, Vol 7, Iss 5, p 069 (2019)
We study the properties of the entanglement spectrum in gapped non-interacting non-Hermitian systems, and its relation to the topological properties of the system Hamiltonian. Two different families of entanglement Hamiltonians can be defined in non-
Externí odkaz:
https://doaj.org/article/0208057c1ad44ad29f1a9df19be38365