Optical readout of a superconducting qubit using a scalable
piezo-optomechanical transducer
- URL: http://arxiv.org/abs/2310.06026v2
- Date: Thu, 2 Nov 2023 16:31:35 GMT
- Title: Optical readout of a superconducting qubit using a scalable
piezo-optomechanical transducer
- Authors: T.C. van Thiel, M.J. Weaver, F. Berto, P. Duivestein, M. Lemang, K.L.
Schuurman, M. \v{Z}emli\v{c}ka, F. Hijazi, A.C. Bernasconi, E. Lachman, M.
Field, Y. Mohan, F.K. de Vries, C.C. Bultink, J. van Oven, J.Y. Mutus, R.
Stockill, S. Gr\"oblacher
- Abstract summary: Superconducting quantum processors have made significant progress in size and computing potential.
The practical cryogenic limitations of operating large numbers of superconducting qubits are becoming a bottleneck for further scaling.
We demonstrate high-fidelity multi-shot optical readout through an optical fiber of a superconducting transmon qubit connected via a coaxial cable.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Superconducting quantum processors have made significant progress in size and
computing potential. As a result, the practical cryogenic limitations of
operating large numbers of superconducting qubits are becoming a bottleneck for
further scaling. Due to the low thermal conductivity and the dense optical
multiplexing capacity of telecommunications fiber, converting qubit signal
processing to the optical domain using microwave-to-optics transduction would
significantly relax the strain on cryogenic space and thermal budgets. Here, we
demonstrate high-fidelity multi-shot optical readout through an optical fiber
of a superconducting transmon qubit connected via a coaxial cable to a fully
integrated piezo-optomechanical transducer. Using a demolition readout
technique, we achieve a multi-shot readout fidelity of >0.99 at 6 $\mu$W of
optical power transmitted into the cryostat with as few as 200 averages,
without the use of a quantum-limited amplifier. With improved frequency
matching between the transducer and the qubit readout resonator, we anticipate
that single-shot optical readout is achievable. Due to the small footprint
(<0.15mm$^2$) and the modular fiber-based architecture, this device platform
has the potential to scale towards use with thousands of qubits. Our results
illustrate the potential of piezo-optomechanical transduction for
low-dissipation operation of large quantum processors.
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