Zobrazeno 1 - 10
of 2 161
pro vyhledávání: '"Ziegler, K"'
Publikováno v:
Phys. Rev. Lett. 128, 157001 (2022)
We consider s-wave pairing in a double layer of two chiral metals due to Coulomb interaction, and study the Josephson effect near a domain wall, where the sign of the order parameter jumps. The domain wall creates two zero energy modes, whose superpo
Externí odkaz:
http://arxiv.org/abs/2104.07108
Publikováno v:
J. Phys. A: Math. Theor. 54 395302 (2021)
Randomly repeated measurements during the evolution of a closed quantum system create a sequence of probabilities for the first detection of a certain quantum state. The related discrete monitored evolution for the return of the quantum system to its
Externí odkaz:
http://arxiv.org/abs/2012.15182
Autor:
Ziegler, K.
Publikováno v:
J. Phys. A: Math. Theor. 54 205303 (2021)
We propose an approach to process data from interferometric measurements on a closed quantum system at random times. For this purpose a time correlation matrix is introduced which enables us to extract dynamical properties of the quantum system. Afte
Externí odkaz:
http://arxiv.org/abs/2012.03714
Publikováno v:
Phys. Rev. Research 2, 033113 (2020)
We consider the quantum first detection problem for a particle evolving on a graph under repeated projective measurements with fixed rate $1/\tau$. A general formula for the mean first detected transition time is obtained for a quantum walk in a fini
Externí odkaz:
http://arxiv.org/abs/2001.00231
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Publikováno v:
Phys. Rev. B 100, 134514 (2019)
We propose to control of an electron-hole superfluid in semiconductor coupled quantum wells and double layers of two-dimensional (2D) material by an external periodic field. This can either be created by the gates periodically located and attached to
Externí odkaz:
http://arxiv.org/abs/1906.09499
Autor:
Ziegler, K.
Publikováno v:
J. Phys. A: Math. Theor. 52, Number 45 (2019)
The properties of zero modes in particle-hole symmetric systems are analyzed in the presence of strong random scattering by a disordered environment. The study is based on the calculation of the time-averaged density distribution on a lattice. In par
Externí odkaz:
http://arxiv.org/abs/1905.12085
Autor:
Ziegler, K.
A finite photonic lattice with two bands and a random gap is considered. Using a two-dimensional Dirac equation, the effect of a random sign of the Dirac mass is studied numerically. The edge state at the sample boundary has a strong influence on the
Externí odkaz:
http://arxiv.org/abs/1708.08388
Autor:
Sinner, A., Ziegler, K.
Publikováno v:
Phys. Rev. B 96, 165140 (2017)
The average density of states of two- and three-dimensional Weyl fermions is studied in the self-consistent Born approximation (SCBA) and its corrections. The latter have been organized in terms of a 1/N expansion. It turns out that an expansion in t
Externí odkaz:
http://arxiv.org/abs/1707.05595
Autor:
Ziegler, K., Sinner, A.
Publikováno v:
Phys. Rev. Lett. 121, 166401 (2018)
The average density of states in a disordered three-dimensional Weyl system is discussed in the case of a continuous distribution of random scattering. Our result clearly indicate that the average density of states does not vanish, reflecting the abs
Externí odkaz:
http://arxiv.org/abs/1705.00019