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24 April 2020 Background free high fidelity state preparation and measurement (SPAM) in a 171Yb+ qubit (Conference Presentation)
Conrad Roman, Anthony Ransford, Michael Ip, Wesley C. Campbell
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Proceedings Volume 11391, Quantum Information Science, Sensing, and Computation XII; 1139108 (2020) https://doi.org/10.1117/12.2559328
Event: SPIE Defense + Commercial Sensing, 2020, Online Only
Abstract
We present two novel approaches to state detection of qubits defined with trapped ions. The first uses simple pulse sequences from a mode-locked laser to induce state-dependent excitations in less than 1 ns. The resulting atomic fluorescence occurs in the dark, allowing the placement of non-imaging detectors right next to the atom to improve the qubit state detection efficiency and speed.The second employs the long lived F state in Yb+ which has been used in quantum information science almost exclusively for clocks and optical-frequency qubits. We describe how this resource can be used in conjunction with the ground state S1/2 manifold to aid in the scaling of trapped ion quantum information science. Narrow-band optical pumping into the 2F7/2 from one of the conventional 2S1/2 qubit states is projected to achieve a higher state preparation and measurement (SPAM) fidelity than any other demonstrated technique.
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Conrad Roman, Anthony Ransford, Michael Ip, and Wesley C. Campbell "Background free high fidelity state preparation and measurement (SPAM) in a 171Yb+ qubit (Conference Presentation)", Proc. SPIE 11391, Quantum Information Science, Sensing, and Computation XII, 1139108 (24 April 2020); https://doi.org/10.1117/12.2559328
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KEYWORDS
Quantum communications
Ions
Quantum information
Chemical species
Luminescence
Mode locking
Pulsed laser operation
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