High-fidelity detection of information encoded in bosonic modes: Part II
ORAL
Abstract
Single-shot qubit measurement is vital for universal quantum computation. In the field of superconducting qubits, much progress has been made in the readout and amplification chain; nonetheless, state-of-the-art measurement fidelities are limited by relaxation and detector inefficiency to about 99%. We present an experimental demonstration of a recent proposal [Hann et al, Phys. Rev. A 98, 022305] to improve measurement fidelities by orders of magnitude. By combining repeated QND measurements with error-tolerant encodings, we suppress the effects of both relaxation and detector inefficiency. The results are compared with theoretical predictions and achievable limits are described.
*US Army Research Office grant W911NF-18-1-0212
Air Force Office of Scientific Research grant FA9550-14-1-0052 and FA9550-15-1-0015.
C.T. Hann acknowledges support from the National Science Foundation Graduate Research Fellowship under Grant No. DGE1752134
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Presenters
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Salvatore Elder
- Yale Univ