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Experimental implementation of fully controlled dephasing dynamics and synthetic spectral densities

Author

Listed:
  • Zhao-Di Liu

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Henri Lyyra

    (University of Turku)

  • Yong-Nan Sun

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Bi-Heng Liu

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Chuan-Feng Li

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Guang-Can Guo

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Sabrina Maniscalco

    (University of Turku
    Aalto University)

  • Jyrki Piilo

    (University of Turku)

Abstract

Engineering, controlling, and simulating quantum dynamics is a strenuous task. However, these techniques are crucial to develop quantum technologies, preserve quantum properties, and engineer decoherence. Earlier results have demonstrated reservoir engineering, construction of a quantum simulator for Markovian open systems, and controlled transition from Markovian to non-Markovian regime. Dephasing is an ubiquitous mechanism to degrade the performance of quantum computers. However, all-purpose quantum simulator for generic dephasing is still missing. Here, we demonstrate full experimental control of dephasing allowing us to implement arbitrary decoherence dynamics of a qubit. As examples, we use a photon to simulate the dynamics of a qubit coupled to an Ising chain in a transverse field and also demonstrate a simulation of nonpositive dynamical map. Our platform opens the possibility to simulate dephasing of any physical system and study fundamental questions on open quantum systems.

Suggested Citation

  • Zhao-Di Liu & Henri Lyyra & Yong-Nan Sun & Bi-Heng Liu & Chuan-Feng Li & Guang-Can Guo & Sabrina Maniscalco & Jyrki Piilo, 2018. "Experimental implementation of fully controlled dephasing dynamics and synthetic spectral densities," Nature Communications, Nature, vol. 9(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05817-x
    DOI: 10.1038/s41467-018-05817-x
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