Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Fenner Harper"'
Publikováno v:
Physical Review Research, Vol 1, Iss 3, p 033207 (2019)
Majorana fermions are predicted to arise at the ends of nanowire devices which combine superconductivity, strong spin-orbit coupling, and an external magnetic field. By manipulating networks of these devices with suitable gating, it has been suggeste
Externí odkaz:
https://doaj.org/article/3b23518f006844c281f41165f2f9d8b0
Publikováno v:
Physical Review B, vol 105, iss 4
Recent developments in fractional quantum Hall (FQH) physics highlight the importance of studying FQH phases of particles partially occupying energy bands that are not Landau levels. FQH phases in the regime of strong lattice effects, called fraction
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd1001cd5f54f9fdd5fda2c5a5c55ab9
Wannier functions that are maximally localized help in understanding many properties of crystalline materials. In the absence of topological obstructions, they are at least exponentially localized. In some cases such as flat-band Hamiltonians, it is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9f89a91836d7cb31f5e2b72c144c83d
Publikováno v:
Physical Review B. 98
In two dimensions, interacting Floquet topological phases may arise even in the absence of any protecting symmetry, exhibiting chiral edge transport that is robust to local perturbations. We explore a similar class of Floquet topological phases in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ca0411a8ec84d4e7287bea2ca5fc66e
https://doi.org/10.1103/physrevb.98.045127
https://doi.org/10.1103/physrevb.98.045127
We propose a bulk topological invariant for one-dimensional Floquet systems with chiral symmetry which quantifies the particle transport on each sublattice during the evolution. This chiral flow is physically motivated, locally computable, and improv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f09a56731c9d4849880425233d4bac22
Autor:
Fenner Harper, Rahul Roy
Publikováno v:
Physical Review B. 96
Dynamical phases with novel topological properties are known to arise in driven systems of free fermions. In this paper, we obtain a `periodic table' to describe the phases of such time-dependent systems, generalizing the periodic table for static to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::538f180e0876ac0c6ba781a5cfd90d23
https://doi.org/10.1103/physrevb.96.155118
https://doi.org/10.1103/physrevb.96.155118
Autor:
Rahul Roy, Fenner Harper
Publikováno v:
Physical Review B. 95
Dynamical systems may host a number of remarkable symmetry-protected phases that are qualitatively different from their static analogs. In this work, we consider the phase space of symmetry-respecting unitary evolutions in detail and identify several
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::067bb3a1760522e24af4eb8601eb9151
https://doi.org/10.1103/physrevb.95.195128
https://doi.org/10.1103/physrevb.95.195128
Autor:
Rahul Roy, Fenner Harper
Periodically driven noninteracting systems may exhibit anomalous chiral edge modes, despite hosting bands with trivial topology. We find that these drives have surprising many-body analogs, corresponding to class A, which exhibit anomalous charge and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f960b3b255e941a04c5c31ef344fc2a5
http://arxiv.org/abs/1609.06303
http://arxiv.org/abs/1609.06303
Autor:
Rahul Roy, Fenner Harper
Time-dependent systems have recently been shown to support novel types of topological order that cannot be realised in static systems. In this paper, we consider a range of time-dependent, interacting systems in one dimension that are protected by an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::644275b98eeb4cb8fd0752b36c760520
http://arxiv.org/abs/1602.08089
http://arxiv.org/abs/1602.08089
Publikováno v:
Physical Review B. 92
Even if a noninteracting system has zero Berry curvature everywhere in the Brillouin zone, it is possible to introduce interactions that stabilise a fractional Chern insulator. These interactions necessarily break time-reversal symmetry (either spont
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd6a17db33a01a07cb131d3360d4bf82
https://doi.org/10.1103/physrevb.92.195104
https://doi.org/10.1103/physrevb.92.195104