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Title: Witnessing quantum resource conversion within deterministic quantum computation using one pure superconducting qubit
Authors: Wang, Weiting
Han, J.
Yadin, Benjamin
Ma, Yuwei
Ma, Jiajun
Cai, Weizhou
Xu, Yong
Hu, Ling
Wang, Haiyan
Song, Yi Pu
Gu, Mile
Sun, Luyan
Keywords: Science::Physics
Issue Date: 2019
Source: Wang, W., Han, J., Yadin, B., Ma, Y., Ma, J., Cai, W., . . . Sun, L. (2019). Witnessing quantum resource conversion within deterministic quantum computation using one pure superconducting qubit. Physical Review Letters, 123(22), 220501-. doi:10.1103/physrevlett.123.220501
Journal: Physical Review Letters
Abstract: Deterministic quantum computation with one qubit (DQC1) is iconic in highlighting that exponential quantum speedup may be achieved with negligible entanglement. Its discovery catalyzed a heated study of general quantum resources, and various conjectures regarding their role in DQC1's performance advantage. Coherence and discord are prominent candidates, respectively, characterizing nonclassicality within localized and correlated systems. Here we realize DQC1 within a superconducting system, engineered such that the dynamics of coherence and discord can be tracked throughout its execution. We experimentally confirm that DQC1 acts as a resource converter, consuming coherence to generate discord during its operation. Our results highlight superconducting circuits as a promising platform for both realizing DQC1 and related algorithms, and experimentally characterizing resource dynamics within quantum protocols.
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.123.220501
Rights: © 2019 American Physical Society. All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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