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  1. Article

    Open Access

    Single ion qubit with estimated coherence time exceeding one hour

    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 throug...

    Pengfei Wang, Chun-Yang Luan, Mu Qiao, Mark Um, Junhua Zhang… in Nature Communications (2021)

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  2. Article

    Author Correction: Single-qubit quantum memory exceeding ten-minute coherence time

    In the version of this Letter originally published, in Fig. 2c legend, the entry ‘LO phase noise’ should not have been included. This has now been corrected in the online versions.

    Ye Wang, Mark Um, Junhua Zhang, Shuoming An, Ming Lyu, **g-Ning Zhang… in Nature Photonics (2018)

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  3. Article

    Open Access

    Correction: Corrigendum: Experimental Certification of Random Numbers via Quantum Contextuality

    Scientific Reports 3: Article number: 1627; published online: 09 April 2013; updated: 02 February 2018. The original version of this Article contained an error in the spelling of the author Yangchao Shen, whic...

    Mark Um, **ang Zhang, Junhua Zhang, Ye Wang, Yangchao Shen… in Scientific Reports (2018)

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  4. No Access

    Article

    Single-qubit quantum memory exceeding ten-minute coherence time

    A long-time quantum memory capable of storing and measuring quantum information at the single-qubit level is an essential ingredient for practical quantum computation and communication 1,2 ...

    Ye Wang, Mark Um, Junhua Zhang, Shuoming An, Ming Lyu, **g-Ning Zhang… in Nature Photonics (2017)

  5. Article

    Open Access

    Phonon arithmetic in a trapped ion system

    Single-quantum level operations are important tools to manipulate a quantum state. Annihilation or creation of single particles translates a quantum state to another by adding or subtracting a particle, depend...

    Mark Um, Junhua Zhang, Dingshun Lv, Yao Lu, Shuoming An… in Nature Communications (2016)

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  6. No Access

    Article

    Experimental test of the quantum Jarzynski equality with a trapped-ion system

    The Jarzynski equality relates the free-energy difference between two equilibrium states to the work done on a system through far-from-equilibrium processes—a milestone that builds on the pioneering work of Cl...

    Shuoming An, **g-Ning Zhang, Mark Um, Dingshun Lv, Yao Lu, Junhua Zhang… in Nature Physics (2015)

  7. Article

    Open Access

    Experimental Certification of Random Numbers via Quantum Contextuality

    The intrinsic unpredictability of measurements in quantum mechanics can be used to produce genuine randomness. Here, we demonstrate a random number generator where the randomness is certified by quantum contex...

    Mark Um, **ang Zhang, Junhua Zhang, Ye Wang, Shen Yangchao… in Scientific Reports (2013)

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