Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Medvedyeva, M. V."'
Publikováno v:
Phys. Rev. B 91, 205416 (2015)
We consider a dissipative tight-binding chain. The dissipation manifests as tunneling into/out of the chain from/to a memoryless environment. The evolution of the system is described by the Lindblad equation. Already infinitesimally small dissipation
Externí odkaz:
http://arxiv.org/abs/1409.1625
Autor:
Medvedyeva, M. V., Kehrein, S.
Publikováno v:
Phys. Rev. B 90, 205410 (2014)
We address the question of how a non-equilibrium steady state (NESS) is reached in the Linbdladian dynamics of an open quantum system. We develop an expansion of the density matrix in terms of the NESS-excitations, each of which has its own (exponent
Externí odkaz:
http://arxiv.org/abs/1406.1408
Autor:
Medvedyeva, M. V., Kehrein, S.
We develop a method of calculating the full-counting statistics for a non-interacting fermionic system coupled to the memory-less reservoirs. The evolution of the system is described by the Lindblad equation. By the basis change the Liouvillian opera
Externí odkaz:
http://arxiv.org/abs/1310.4997
Publikováno v:
Phys. Rev. B 83, 134519 (2011)
The bulk microwave conductivity of a dirty d-wave superconductor is known to depend sensitively on the range of the disorder potential: long-range scattering enhances the conductivity, while short- range scattering has no effect. Here we show that th
Externí odkaz:
http://arxiv.org/abs/1012.4511
Autor:
Medvedyeva, M. V., Blanter, Ya. M.
We investigate the conductivity of graphene sheet deformed over a gate. The effect of the deformation on the conductivity is twofold: The lattice distortion can be represented as pseudovector potential in the Dirac equation formalism, whereas the gat
Externí odkaz:
http://arxiv.org/abs/1006.5010
Publikováno v:
Phys. Rev. B 81, 214203 (2010)
This is a numerical study of quasiparticle localization in symmetry class \textit{BD} (realized, for example, in chiral \textit{p}-wave superconductors), by means of a staggered-fermion lattice model for two-dimensional Dirac fermions with a random m
Externí odkaz:
http://arxiv.org/abs/1004.1111
Publikováno v:
Phys. Rev. Lett. 105, 046803 (2010)
Vortices in two-dimensional superconductors with broken time-reversal and spin-rotation symmetry can bind states at zero excitation energy. These socalled Majorana bound states transform a thermal insulator into a thermal metal and may be used to enc
Externí odkaz:
http://arxiv.org/abs/1002.3570
Publikováno v:
Phys. Rev. B 81, 121414(R) (2010)
It is known that fluctuations in the electrostatic potential allow for metallic conduction (nonzero conductivity in the limit of an infinite system) if the carriers form a single species of massless two-dimensional Dirac fermions. A nonzero uniform m
Externí odkaz:
http://arxiv.org/abs/1002.0817
Publikováno v:
Phys. Rev. B 80, 245433 (2009)
Spin precession has been used to measure the transmission time \tau over a distance L in a graphene sheet. Since conduction electrons in graphene have an energy-independent velocity v, one would expect \tau > L/v. Here we calculate that \tau < L/v at
Externí odkaz:
http://arxiv.org/abs/0910.2657
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