Scalable simultaneous multiqubit readout with 99.99% single-shot fidelity

Journal Article · Thu Apr 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.040302· OSTI ID:21408544

Burrell, A H; Szwer, D J; Webster, S C; Lucas, D M ^[1]

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1. Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU (United Kingdom)

We describe single-shot readout of a trapped-ion multiqubit register using space- and time-resolved camera detection. For a single qubit we measure 0.9(3)x10{sup -4} readout error in 400 {mu}s exposure time, limited by the qubit's decay lifetime. For a four-qubit register (a 'qunybble'), we measure an additional error of only 0.1(1)x10{sup -4} per qubit, despite the presence of 4% optical cross-talk between neighboring qubits. A study of the cross-talk indicates that the method would scale with a negligible loss of fidelity to {approx}10 000 qubits at a density of < or approx. 1 qubit/{mu}m{sup 2}, with a readout time of {approx}1 {mu}s/qubit.

• OSTI ID: 21408544
• Journal Information: Physical Review. A, Vol. 81, Issue 4; Other Information: DOI: 10.1103/PhysRevA.81.040302; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CAMERAS
DECAY
DETECTION
ERRORS
IONS
LIFETIME
LOSSES
QUBITS
READOUT SYSTEMS
SPACE
TIME RESOLUTION
TRAPPING
CHARGED PARTICLES
INFORMATION
QUANTUM INFORMATION
RESOLUTION
TIMING PROPERTIES