Quantum Sensing with Erasure Qubits

• URL: http://arxiv.org/abs/2310.01512v1
• Date: Mon, 2 Oct 2023 18:05:10 GMT
• Title: Quantum Sensing with Erasure Qubits
• Authors: Pradeep Niroula, Jack Dolde, Xin Zheng, Jacob Bringewatt, Adam Ehrenberg, Kevin C. Cox, Jeff Thompson, Michael J. Gullans, Shimon Kolkowitz, Alexey V. Gorshkov
• Abstract summary: Erasure qubits have potential to reduce the overhead associated with fault tolerance. We show theoretically that, for the same level of noise, an erasure qubit acts as a more precise sensor or clock. Similar benefits of erasure qubits to sensing can be realized in other quantum platforms like Rydberg atoms and superconducting qubits
• Score: 4.133900392064984
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The dominant noise in an "erasure qubit" is an erasure -- a type of error whose occurrence and location can be detected. Erasure qubits have potential to reduce the overhead associated with fault tolerance. To date, research on erasure qubits has primarily focused on quantum computing and quantum networking applications. Here, we consider the applicability of erasure qubits to quantum sensing and metrology. We show theoretically that, for the same level of noise, an erasure qubit acts as a more precise sensor or clock compared to its non-erasure counterpart. We experimentally demonstrate this by artificially injecting either erasure errors (in the form of atom loss) or dephasing errors into a differential optical lattice clock comparison, and observe enhanced precision in the case of erasure errors for the same injected error rate. Similar benefits of erasure qubits to sensing can be realized in other quantum platforms like Rydberg atoms and superconducting qubits

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