Journal
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Volume 44, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-4075/44/2/025501
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Funding
- EPSRC (QIP IRC)
- IARPA [47968-PH-QC]
- European Commission
- Royal Society
- Engineering and Physical Sciences Research Council [EP/E036066/1] Funding Source: researchfish
- EPSRC [EP/E036066/1] Funding Source: UKRI
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We demonstrate the use of dynamic decoupling techniques to extend the coherence time of a single memory qubit by nearly two orders of magnitude. By extending the Hahn spin-echo technique to correct for unknown, arbitrary polynomial variations in the qubit precession frequency, we show analytically that the required sequence of pi-pulses is identical to the Uhrig dynamic decoupling (UDD) sequence. We compare UDD and Carr-Purcell-Meiboom-Gill (CPMG) sequences applied to a single Ca-43(+) trapped-ion qubit and find that they afford comparable protection in our ambient noise environment.
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