A mechanical qubit
Yu Yang, Igor Kladaric, Maxwell Drimmer, Uwe von Luepke, Daan, Lenterman, Joost Bus, Stefano Marti, Matteo Fadel, Yiwen Chu

TL;DR
This paper demonstrates a solid-state mechanical system that operates as a single-phonon nonlinear quantum bit, enabling quantum control and readout at the single-phonon level, advancing quantum acoustics applications.
Contribution
It introduces a mechanical qubit based on single-phonon nonlinearities with anharmonicity surpassing decoherence, enabling quantum gate operations in a solid-state system.
Findings
Achieved single-phonon anharmonicity exceeding decoherence rate by 6.8 times
Demonstrated initialization, readout, and quantum gates for the mechanical qubit
Enhanced quantum acoustics platform for quantum information processing
Abstract
Strong nonlinear interactions between quantized excitations are an important resource for quantum technologies based on bosonic oscillator modes. However, most electromagnetic and mechanical nonlinearities arising from intrinsic material properties are far too weak compared to dissipation in the system to allow for nonlinear effects to be observed on the single-quantum level. To overcome this limitation, electromagnetic resonators in both the optical and microwave frequency regimes have been coupled to other strongly nonlinear quantum systems such as atoms and superconducting qubits, allowing for the demonstration of effects such as photon blockade and coherent quantum protocols using the Kerr effect. Here, we demonstrate the realization of the single-phonon nonlinear regime in a solid-state mechanical system. The single-phonon anharmonicity in our system exceeds the decoherence rate by…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsExperimental and Theoretical Physics Studies
