Flat band quantum scar
WebMar 31, 2024 · These results are an important step in the understanding, both from the theoretical and the experimental points of view, of flat-band materials combining topology and interactions and leading to exotic quantum phenomena, such as magnetism, non-Fermi liquid behaviour and superconductivity. WebMay 3, 2024 · Quantum many-body scars (QMBS) appear in a flat-band model with interactions on the sawtooth lattice. The flat-band model includes a compact support localized eigenstates, called compact localized state (CLS). Some characteristic many-body states can be constructed from the CLSs at a low-filling on the flat-band. These many …
Flat band quantum scar
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WebWe propose a general construction scheme for a quantum scar state in flat band systems. The quantum scar is an atypical eigenstate breaking eigenstate thermalization … WebNov 20, 2024 · We provide an analytical understanding of these states and show that they survive in the presence of density-density interactions along the backbone of the system where, for sufficiently low but finite particle densities, they form many-body scar states.
WebThe quantum scar is an atypical eigenstate breaking eigenstate thermalization hypothesis embedded in a many-body energy spectrum. In our construction, we make use of orthogonal compact localized states that are characteristics of certain flat-band models. We concretely discuss our construction scheme, taking a saw-tooth flat lattice system as ... WebMar 21, 2024 · A critical result in superconductivity is that flat bands, though dispersionless, can still host nonzero superfluid weight due to quantum geometry. We show that the derivation of the mean field superfluid weight in previous literature is incomplete, which can lead to severe quantitative and even qualitative errors. We derive the complete equations …
WebOur construction method of quantum scar has broad applications to various flat band systems. We show that a quantum scar state, an atypical eigenstate breaking … WebMay 28, 2024 · Flat bands are said to be dispersionless in the following sense: the group velocity for wave packets is d E ( k) / d k = 0 and therefore each wave packet preserves its form under time evolution. If it is initially localized it stays localized forever. This can be easily shown using the Fourier transform:
WebOct 22, 2024 · In our previous work [C. J. Turner et al., Nat. Phys. 14, 745 (2024) ], such dynamics was attributed to the existence of “quantum scarred” eigenstates in the many-body spectrum of the experimentally realized model. Here, we present a detailed study of the eigenstate properties of the same model.
WebJun 21, 2024 · The notion of an electronic flat band refers to a collectively degenerate set of quantum mechanical eigenstates in periodic solids. The vanishing kinetic energy of flat bands relative to the electron-electron interaction is expected to result in a variety of many-body quantum phases of matter. rita heckWebWe show that a quantum scar state, an atypical eigenstate breaking eigenstate thermalization hypothesis embedded in a many-body energy spectrum, can be … smiley cleaning serviceWebJun 22, 2024 · This paper proposes different mechanisms to realize robust quantum scars in two-dimensional arrays of Rydberg atoms. The results show that a small perturbation to the system can lead to a significant suppression of the thermalization rate of a small set of states Skip to Main Content Journals Physical Review Letters Physical Review X PRX … rita heartWebJan 27, 2024 · A topological flat band is another entity with promising prospects for the realization of the fractional quantum Hall effect 8,9,10,11. However, coexisting Dirac and flat bands in magnetic ... smiley clap clapWebNov 4, 2015 · Flat band occurs in a variety of condensed-matter systems, ranging from the Landau levels of an electron gas 6, edge states of graphene 7 to unconventional superconductors 8. smiley clin d\\u0027oeilWebMar 8, 2024 · Flat bands play an important role in diffraction-free photonics and attract fundamental interest in many-body physics. Here we report the engineering of flat-band localization of collective excited states of atoms in Creutz superradiance lattices with tunable synthetic gauge fields. Magnitudes and phases of the lattice hopping coefficients can be … smiley clin d\u0027oeilWebOct 5, 2024 · Abstract and Figures We show that a quantum scar state, an atypical eigenstate breaking eigenstate thermalization hypothesis … rita heaton