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27 April 2020 133Ba+: High fidelity goldilocks qubits (Conference Presentation)
David Hucul, Paige Haas, Harris J. Rutbeck-Goldman, Zachary S. Smith, Boyan Tabakov, James A. Williams, Carson F. Woodford, Kathy-Anne B. Soderberg, Justin E. Christensen, Eric R. Hudson, Wesley C. Campbell
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Proceedings Volume 11391, Quantum Information Science, Sensing, and Computation XII; 1139107 (2020) https://doi.org/10.1117/12.2559370
Event: SPIE Defense + Commercial Sensing, 2020, Online Only
Abstract
Atomic ions can be isolated from their environment through laser-cooling and trapping, making them useful for quantum information processing, measurement, and sensing. A variety of atomic ion species have been used as qubits. Hyperfine qubits with nuclear spin I = 1/2 have demonstrated the long qubit coherence times with simple, robust laser manipulation. Other qubits (I ≠ 1/2) have easily-prepared, long-lived metastable electronic excited states, and simple discrimination between these states allows high fidelity readout. However, none of the naturally- occurring, atomic ions with nuclear spin I = 1/2 have these excited states that are simultaneously long-lived and easy to prepare. We demonstrate loading, cooling, and qubit manipulation of an artificial, I = 1/2 species of barium with visible wavelength lasers: 133Ba+. We achieved a single shot qubit state preparation and readout fidelity of F = 0.9997, the lowest error rate ever achieved by any qubit on any platform.
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David Hucul, Paige Haas, Harris J. Rutbeck-Goldman, Zachary S. Smith, Boyan Tabakov, James A. Williams, Carson F. Woodford, Kathy-Anne B. Soderberg, Justin E. Christensen, Eric R. Hudson, and Wesley C. Campbell "133Ba+: High fidelity goldilocks qubits (Conference Presentation)", Proc. SPIE 11391, Quantum Information Science, Sensing, and Computation XII, 1139107 (27 April 2020); https://doi.org/10.1117/12.2559370
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KEYWORDS
Quantum communications
Ions
Barium
Environmental sensing
Laser processing
Precision measurement
Quantum information
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