Quantum error correction with silicon spin qubits
- URL: http://arxiv.org/abs/2201.08581v1
- Date: Fri, 21 Jan 2022 07:59:49 GMT
- Title: Quantum error correction with silicon spin qubits
- Authors: Kenta Takeda, Akito Noiri, Takashi Nakajima, Takashi Kobayashi, Seigo
Tarucha
- Abstract summary: Large-scale quantum computers rely on quantum error correction to protect the fragile quantum information.
Recent advances in silicon-based qubits have enabled the implementations of high quality one and two qubit systems.
Here, we demonstrate a three-qubit phase correcting code in silicon, where an encoded three-qubit state is protected against any phase-flip error on one of the three qubits.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Large-scale quantum computers rely on quantum error correction to protect the
fragile quantum information. Among the possible candidates of quantum computing
devices, silicon-based spin qubits hold a great promise due to their
compatibility to mature nanofabrication technologies for scaling up. Recent
advances in silicon-based qubits have enabled the implementations of high
quality one and two qubit systems. However, the demonstration of quantum error
correction, which requires three or more coupled qubits and often involves a
three-qubit gate, remains an open challenge. Here, we demonstrate a three-qubit
phase correcting code in silicon, where an encoded three-qubit state is
protected against any phase-flip error on one of the three qubits. The
correction to this encoded state is performed by a three-qubit conditional
rotation, which we implement by an efficient single-step resonantly driven
iToffoli gate. As expected, the error correction mitigates the errors due to
one qubit phase-flip as well as the intrinsic dephasing due to quasi-static
phase noise. These results show a successful implementation of quantum error
correction and the potential of silicon-based platform for large-scale quantum
computing.
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