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DTSTART:20170312T020000
RDATE:20170312T020000
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DTEND;TZID=US/Eastern;VALUE=DATE-TIME:20170421T131500
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DESCRIPTION:We present new composite pulse sequences for performing arbit
rary rotations in singlet-triplet qubits that are faster than existing s
equences. We consider two sequences for performing a z rotation\, one t
hat generalizes the Hadamard-x-Hadamard sequence\, and another that gene
ralizes a sequence by Guy Ramon (G. Ramon\, Phys. Rev. B 84\, 155329 (20
11)). We determine the time required to perform each sequence\, and fin
d that our "generalized Hadamard-x-Hadamard" sequence can always be made
faster than the "generalized Ramon sequence". We then present similar
sequences for performing x rotations\, one that generalizes the Hadamard
-z-Hadamard sequence and another that is based on Ramon's z rotation seq
uence. In this case\, we find that the "Ramon-like" sequence is faster.
We also present sequences for performing other rotations. We then fin
d versions of these sequences dynamically corrected for noise-induced er
rors using SUPCODE (X. Wang et. al.\, PRA 89\, 022310 (2014)).\n \nRefer
ence: C. Zhang\, RET\, X-C. Yang\, X. Wang\, E. Barnes\, and S. Das Sarm
a\, arXiv:1701.03796 (submitted to PRL)\, plus currently unpublished wor
k.
URL:https://talks.cs.umd.edu/talks/1767
SUMMARY:Robert Throckmorton - Faster Pulse Sequences for Performing Arbit
rary Rotations in Singlet-Triplet Qubits
LOCATION:2136 PSC
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