Single ion qubit with estimated coherence time exceeding one hour.

ABSTRACT: Realizing a long coherence time quantum memory is a major challenge of current quantum technology. Until now, the longest coherence-time of a single qubit was reported as 660 s in a single ¹⁷¹Yb⁺ ion-qubit through the technical developments of sympathetic cooling and dynamical decoupling pulses, which addressed heating-induced detection inefficiency and magnetic field fluctuations. However, it was not clear what prohibited further enhancement. Here, we identify and suppress the limiting factors, which are the remaining magnetic-field fluctuations, frequency instability and leakage of the microwave reference-oscillator. Then, we observe the coherence time of around 5500 s for the ¹⁷¹Yb⁺ ion-qubit, which is the time constant of the exponential deca

SUBMITTER: Wang P 

PROVIDER: S-EPMC7801401 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature