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Berlin 2018 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 99: Poster Session: Transport

TT 99.43: Poster

Thursday, March 15, 2018, 15:00–19:00, Poster B

Investigation of a superconducting quantum metamaterial — •Jan David Brehm1 and Alexey V. Ustinov1,21Physikalisches Institut, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany — 2Russian Quantum Center, National University of Science and Technology MISIS, Moscow 119049, Russia

Quantum metamaterials extend the idea of classical metamaterials to a regime where the quantum coherence of the meta-atoms exceeds the typical propagation time of an impinging wave through the medium. In recent works, it was proposed that this gives rise to various collective light-matter interaction effects such as selfinduced transparency, quasi-superradiant phase transitions and lasing. Superconducting qubits are strong candidates for an implementation of meta-atoms in the quantum regime because they feature well controllable properties, have sub-wavelength dimensions, and are known to have sufficiently long coherence times. First implementations of quantum metamaterials made of arrays of superconducting flux [1] and transmon [2] qubits were targeted at studying their collective interaction with a single mode of a microwave resonator. Here, we investigate a one-dimensional quantum material which consists of an array of transmon qubits coupled to a continuum of the light modes in a coplanar waveguide.
P. Macha et al., Nature Commun. 5, 5146 (2014)
K. V. Shulga et al., JETP Lett. 105, 47 (2017)

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