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. Ustinov1,2 — 1Physikalisches 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)