Hyperbolic lattices in circuit quantum electrodynamics

Alicia J. Kollár, Mattias Fitzpatrick, Andrew A. Houck

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

After two decades of development, cavity quantum electrodynamics with superconducting circuits has emerged as a rich platform for quantum computation and simulation. Lattices of coplanar waveguide resonators constitute artificial materials for microwave photons, in which interactions between photons can be incorporateded either through the use of nonlinear resonator materials or through coupling between qubits and resonators. Here we make use of the previously overlooked property that these lattice sites are deformable and permit tight-binding lattices that are unattainable even in solid-state systems. We show that networks of coplanar waveguide resonators can create a class of materials that constitute lattices in an effective hyperbolic space with constant negative curvature. We present numerical simulations of hyperbolic analogues of the kagome lattice that show unusual densities of states in which a macroscopic number of degenerate eigenstates comprise a spectrally isolated flat band. We present a proof-of-principle experimental realization of one such lattice. This paper represents a step towards on-chip quantum simulation of materials science and interacting particles in curved space.

Original languageEnglish (US)
Pages (from-to)45-50
Number of pages6
JournalNature
Volume571
Issue number7763
DOIs
StatePublished - Jul 4 2019

All Science Journal Classification (ASJC) codes

  • General

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