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Single ion qubit with estimated coherence time exceeding one hour

Physics

Single ion qubit with estimated coherence time exceeding one hour

P. Wang, C. Luan, et al.

This groundbreaking research conducted by Pengfei Wang, Chun-Yang Luan, Mu Qiao, Mark Um, Junhua Zhang, Ye Wang, Xiao Yuan, Mile Gu, Jingning Zhang, and Kihwan Kim reveals how a single ¹⁷¹Yb⁺ ion qubit achieved an unprecedented coherence time of about 5500 seconds. This advancement paves the way for faster and more reliable quantum memories in technological applications.

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Playback language: English
Abstract
Realizing a long coherence time quantum memory is crucial for quantum technology. This paper reports achieving a coherence time of approximately 5500 seconds for a single ¹⁷¹Yb⁺ ion qubit, significantly exceeding previous records. This was accomplished by identifying and suppressing limiting factors such as magnetic field fluctuations, frequency instability, and microwave leakage. The decoherence process was systematically studied using quantum process tomography and analyzed with resource theories of quantum memory and coherence. This advancement is expected to accelerate the practical applications of quantum memories in various quantum information processing tasks.
Publisher
Nature Communications
Published On
Jan 11, 2021
Authors
Pengfei Wang, Chun-Yang Luan, Mu Qiao, Mark Um, Junhua Zhang, Ye Wang, Xiao Yuan, Mile Gu, Jingning Zhang, Kihwan Kim
DOI
https://doi.org/10.1038/s41467-020-20330-w
Tags
quantum memory
coherence time
quantum information
¹⁷¹Yb⁺ ion
decoherence
quantum process tomography
resource theories

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