Topological Order, Mixed States and Open Systems
نویسندگان
چکیده
منابع مشابه
Topological order of mixed states in correlated quantum many-body systems
Topological order has become a new paradigm to distinguish ground states of interacting many-body systems without conventional long-range order. Here, we discuss possible extensions of this concept to density matrices describing statistical ensembles. For a large class of quasithermal states, which can be realized as thermal states of some quasilocal Hamiltonian, we generalize earlier definitio...
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Optics played a key role in the discovery of geometric phase. Once again, it joins the journey of exploring topological physics, bringing us bosonic topological states of one-way waveguides, Weyl points and a single surface Dirac cone. At the interfaces of topological photonic materials, the propagation of photons is protected against disorder by the momentum-space topologies in the bulk. Topol...
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We propose a mixed-geometry system of fermionic species selectively confined in lattices of different geometry. We investigate how such asymmetry can lead to exotic multiband fermion pairing in an example system of honeycomb and triangular lattices. A rich phase diagram of interband pairing with gapped and gapless excitations is found at zero temperature. We find that the two-band contribution ...
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ژورنال
عنوان ژورنال: Open Systems & Information Dynamics
سال: 2019
ISSN: 1230-1612,1793-7191
DOI: 10.1142/s1230161219500124