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DTSTAMP:20211207T054813Z
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DTSTART;TZID=America/Chicago:20211118T153000
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UID:submissions.supercomputing.org_SC21_sess171_pap345@linklings.com
SUMMARY:Empirical Evaluation of Circuit Approximations on Noisy Quantum De
 vices
DESCRIPTION:Paper\n\nEmpirical Evaluation of Circuit Approximations on Noi
 sy Quantum Devices\n\nWilson, Mueller, Bassman, Iancu\n\nNoisy Intermediat
 e-Scale Quantum (NISQ) devices fail to produce outputs with sufficient fid
 elity for deep circuits with many gates today. Such devices suffer from re
 ad-out, multi-qubit gate and cross-talk noise combined with short decohere
 nce times limiting circuit depth. This work develops a methodology to gene
 rate shorter circuits with fewer multi-qubit gates whose unitary transform
 ations approximate the original reference one. It explores the benefit of 
 such generated approximations under NISQ devices. Experimental results wit
 h Grover’s Algorithm, Multiple-control Toffoli Gates and the Transverse Fi
 eld Ising Model show that such approximate circuits produce higher fidelit
 y results than longer, theoretically precise circuits on NISQ devices, esp
 ecially when the reference circuits initially contain many CNOT gates. Wit
 h this ability to fine-tune circuits, it is demonstrated that quantum comp
 utations can be performed for more complex problems on today’s devices tha
 n previously feasible, sometimes even with a gain in overall precision of 
 up to 60%.\n\nTag: Algorithms, Applications, Architectures, Quantum Comput
 ing\n\nRegistration Category: Tech Program Reg Pass
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