TY - JOUR
T1 - Quantum Dephasing in a Gated GaAs Triple Quantum Dot due to Nonergodic Noise
AU - Delbecq, M. R.
AU - Nakajima, T.
AU - Stano, P.
AU - Otsuka, T.
AU - Amaha, S.
AU - Yoneda, J.
AU - Takeda, K.
AU - Allison, G.
AU - Ludwig, A.
AU - Wieck, A. D.
AU - Tarucha, S.
N1 - Publisher Copyright:
© 2016 American Physical Society.
PY - 2016/1/26
Y1 - 2016/1/26
N2 - We extract the phase coherence of a qubit defined by singlet and triplet electronic states in a gated GaAs triple quantum dot, measuring on time scales much shorter than the decorrelation time of the environmental noise. In this nonergodic regime, we observe that the coherence is boosted and several dephasing times emerge, depending on how the phase stability is extracted. We elucidate their mutual relations, and demonstrate that they reflect the noise short-time dynamics.
AB - We extract the phase coherence of a qubit defined by singlet and triplet electronic states in a gated GaAs triple quantum dot, measuring on time scales much shorter than the decorrelation time of the environmental noise. In this nonergodic regime, we observe that the coherence is boosted and several dephasing times emerge, depending on how the phase stability is extracted. We elucidate their mutual relations, and demonstrate that they reflect the noise short-time dynamics.
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U2 - 10.1103/PhysRevLett.116.046802
DO - 10.1103/PhysRevLett.116.046802
M3 - Article
AN - SCOPUS:84957831125
SN - 0031-9007
VL - 116
JO - Physical Review Letters
JF - Physical Review Letters
IS - 4
M1 - 046802
ER -