Interlaced Dynamical Decoupling and Coherent Operation of a Singlet-Triplet Qubit

Autor:	Barthel, C., Medford, J., Marcus, C. M., Hanson, M. P., Gossard, A. C.
Rok vydání:	2010
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Quantum Physics
Zdroj:	Phys. Rev. Lett. 105 266808 (2010)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.105.266808
Popis:	We experimentally demonstrate coherence recovery of singlet-triplet superpositions by interlacing qubit rotations between Carr-Purcell (CP) echo sequences. We then compare performance of Hahn, CP, concatenated dynamical decoupling (CDD) and Uhrig dynamical decoupling (UDD) for singlet recovery. In the present case, where gate noise and drift combined with spatially varying hyperfine coupling contribute significantly to dephasing, and pulses have limited bandwidth, CP and CDD yield comparable results, with T2 ~ 80 microseconds. Comment: related papers at http://marcuslab.harvard.edu
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1007.4255 Zobrazit plný text záznamu View this record from Arxiv