Zobrazeno 1 - 10
of 195
pro vyhledávání: '"Röntgen, M."'
We demonstrate that rotation symmetry is not a necessary requirement for the existence of fractional corner charges in Cn-symmetric higher-order topological crystalline insulators. Instead, it is sufficient to have a latent rotation symmetry, which m
Externí odkaz:
http://arxiv.org/abs/2405.02704
Publikováno v:
Phys. Rev. B 104, 035105 (2021)
Flat energy bands of model lattice Hamiltonians provide a key ingredient in designing dispersionless wave excitations and have become a versatile platform to study various aspects of interacting many-body systems. Their essential merit lies in hostin
Externí odkaz:
http://arxiv.org/abs/2102.12446
Autor:
Röntgen, M., Pyzh, M., Morfonios, C. V., Palaiodimopoulos, N. E., Diakonos, F. K., Schmelcher, P.
Publikováno v:
Phys. Rev. Lett. 126, 180601 (2021)
Degeneracies in the energy spectra of physical systems are commonly considered to be either of accidental character or induced by symmetries of the Hamiltonian. We develop an approach to explain degeneracies by tracing them back to symmetries of an i
Externí odkaz:
http://arxiv.org/abs/2011.13404
Autor:
Röntgen, M., Palaiodimopoulos, N. E., Morfonios, C. V., Brouzos, I., Pyzh, M., Diakonos, F. K., Schmelcher, P.
Publikováno v:
Phys. Rev. A 101, 042304 (2020)
We present an algorithm to design networks that feature pretty good state transfer (PGST), which is of interest for high-fidelity transfer of information in quantum computing. Realizations of PGST networks have so far mostly relied either on very spe
Externí odkaz:
http://arxiv.org/abs/1908.02046
Publikováno v:
Phys. Rev. Lett. 123, 080504 (2019)
We propose modulation protocols designed to generate, store and transfer compact localized states in a quantum network. Induced by parameter tuning or local reflection symmetries, such states vanish outside selected domains of the complete system and
Externí odkaz:
http://arxiv.org/abs/1811.02950
Publikováno v:
Annals of Physics 418, 168163 (2020)
The impact of local reflection symmetry on wave localization and transport within finite disordered chains is investigated. Local symmetries thereby play the role of a spatial correlation of variable range in the finite system. We find that, on ensem
Externí odkaz:
http://arxiv.org/abs/1807.02793
Publikováno v:
Phys. Rev. B 97, 035161 (2018)
We propose a framework for the connection between local symmetries of discrete Hamiltonians and the design of compact localized states. Such compact localized states are used for the creation of tunable, local symmetry-induced bound states in an ener
Externí odkaz:
http://arxiv.org/abs/1709.07806
Publikováno v:
In Linear Algebra and Its Applications 1 September 2021 624:53-86
Publikováno v:
In Annals of Physics July 2020 418
Non-local currents and the structure of eigenstates in planar discrete systems with local symmetries
Publikováno v:
In Annals of Physics May 2017 380:135-153