Bolometer operating at the threshold for circuit quantum electrodynamics
ORAL
Abstract
Bolometers operating at low temperatures are promising for detection of itinerant microwave photons and qubit readout. They benefit from a broad detection bandwidth and low dissipation. However, single-microwave-photon sensitivity has not been achieved yet. To address this issue, we experimentally demonstrate an ultrafast bolometer based on a graphene Josephson junction and operating at the threshold of circuit quantum electrodynamics [1]. Graphene, with its unusual thermal properties, offers the opportunity to reach the single-microwave-photon regime. Our device yields a noise equivalent power of 30 zW/rtHz at a thermal time constant of 500 ns and an extracted energy resolution of h×30 GHz.
[1] R. Kokkoniemi et al., Bolometer operating at the threshold for circuit quantum electrodynamics, Nature, 586, 47-51 (2020)
[1] R. Kokkoniemi et al., Bolometer operating at the threshold for circuit quantum electrodynamics, Nature, 586, 47-51 (2020)
*We acknowledge funding from the European Research Council under Consolidator Grant number 681311 (QUESS) and under Advanced Grant number 670743 (QuDeT), the European Commission through the H2020 programme project QMiCS, the Academy of Finland through its Centres of Excellence Programme and grants, the Finnish Cultural Foundation and the Vilho, Yrjö and Kalle Väisälä Foundation of the Finnish Academy of Science and Letters.
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Presenters
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Jean-Philippe Girard
- QCD Labs, Aalto University