Cryogenic microwave link for quantum local area networks
- URL: http://arxiv.org/abs/2308.12398v1
- Date: Wed, 23 Aug 2023 19:34:56 GMT
- Title: Cryogenic microwave link for quantum local area networks
- Authors: M. Renger, S. Gandorfer, W. Yam, F. Fesquet, M. Handschuh, K. E.
Honasoge, F. Kronowetter, Y. Nojiri, M. Partanen, M. Pfeiffer, H. van der
Vliet, A. J. Matthews, J. Govenius, R. N. Jabdaraghi, M. Prunnila, A. Marx,
F. Deppe, R. Gross, K. G. Fedorov
- Abstract summary: We demonstrate a basic prototype for a microwave QLAN based on a cryogenic link connecting two individual dilution cryostats over a distance of 6.6m with a base temperature of 52mK in the center.
We employ superconducting coaxial microwave transmission lines to form a quantum communication channel and characterize its potential by demonstrating robust entanglement distribution in the form of two-mode squeezing between remote parties.
- Score: 1.8556717348313796
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Scalable quantum information processing with superconducting circuits is
about to advance from individual processors in single dilution refrigerators to
more powerful distributed quantum computing systems located in separate cooling
units in order to achieve a practical quantum advantage. Hence, realization of
hardware platforms for quantum local area networks (QLANs) compatible with
superconducting technology is of high importance. Here, we demonstrate a basic
prototype for a microwave QLAN based on a cryogenic link connecting two
individual dilution cryostats over a distance of 6.6m with a base temperature
of 52mK in the center. We provide details about the system design,
installation, and performance. We employ superconducting coaxial microwave
transmission lines to form a quantum communication channel and characterize its
potential by demonstrating robust entanglement distribution in the form of
two-mode squeezing between remote parties. By preserving entanglement
distribution at link temperatures up to 1K, we experimentally verify the
fluctuation-dissipation theorem. Consequently, we demonstrate that our system
can form the backbone for future distributed quantum computing applications.
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