Quantum Sensing with Erasure Qubits
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 nonerasure 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. In the context of a clock with repeated measurement cycles, erasure can improve the stability by a factor of 2. Similar benefits of erasure qubits to sensing can be realized in other quantum platforms like Rydberg atoms and superconducting qubits.
Authors
- Alexey Vyacheslavovich Gorshkov (ORCID: https://orcid.org/0000-0003-0509-3421)
- Xin Zheng (ORCID: https://orcid.org/0000-0003-4745-8070)
- Michael J. Gullans (ORCID: https://orcid.org/0000-0003-3974-2987)
- Shimon Kolkowitz (ORCID: https://orcid.org/0000-0001-7095-1547)
- Pradeep Niroula (ORCID: https://orcid.org/0000-0001-8941-7774)
- Kevin C. Cox (ORCID: https://orcid.org/0000-0001-5049-3999)
- Adam Ehrenberg (ORCID: https://orcid.org/0000-0002-3167-6519)
- Jacob Bringewatt (ORCID: https://orcid.org/0000-0003-3235-3444)
- Jeff Thompson
- Jack Dolde
Institutions
- University of Wisconsin–Madison (US)
- DEVCOM Army Research Laboratory (US)
- Princeton University (US)
- United States Army Combat Capabilities Development Command (US)
- Joint Center for Quantum Information and Computer Science (US)
- Joint Quantum Institute (US)
- University of Maryland, College Park (US)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2024-08-19
- DOI
- https://doi.org/10.1103/physrevlett.133.080801
- Citations
- 11
- Primary Topic
- Advanced Frequency and Time Standards
- Type
- article
- Field-Weighted Citation Impact
- 3.71
Funders
- National Science Foundation
- U.S. Department of Energy
- Alfred P. Sloan Foundation
- Defense Advanced Research Projects Agency
- Office of Science
- Multidisciplinary University Research Initiative
- Advanced Scientific Computing Research
- Air Force Office of Scientific Research
- Army Research Office