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Experimental implementation of generalized transitionless quantum driving

机译：广义过渡量子驾驶的实验实施

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摘要

It is known that high intensity fields are usually required to implement shortcuts to adiabaticity via transitionless quantum driving (TQD). Here, we show that this requirement can be relaxed by exploiting the gauge freedom of generalized TQD, which is expressed in terms of an arbitrary phase when mimicking the adiabatic evolution. We experimentally investigate the performance of generalized TQD in comparison to both traditional TQD and adiabatic dynamics. By using a Yb-171(+) trapped ion hyperfine qubit, we implement a Landau-Zener adiabatic Hamiltonian and its (traditional and generalized) TQD counterparts. We show that the generalized theory provides energy-optimal Hamiltonians for TQD, with no additional fields required. In addition, the optimal TQD Hamiltonian for the Landau-Zener model is investigated under dephasing. Even using less intense fields, optimal TQD exhibits fidelities that are more robust against a decohering environment, with performance superior to that provided by the adiabatic dynamics. (C) 2018 Optical Society of America
机译：众所周知，通常需要高强度场通过过渡量子驾驶（TQD）来实现到绝热性的捷径。在这里，我们表明，可以通过利用广义TQD的规格自由来放松这一要求，这在模拟绝热进化时以任意阶段表示。我们通过传统TQD和绝热动态进行了实验研究了广义TQD的性能。通过使用YB-171（+）被困的离子超细Qubit，我们实施了Landau-Zener绝热汉密尔顿人及其（传统和广义）TQD对应物。我们表明，广义理论为TQD提供了能源最优汉密尔顿人，无需其他额外的领域。此外，在脱离的情况下调查了Landau-Zener模型的最佳TQD Hamiltonian。即使使用较少的强烈领域，最佳TQD也展示了对拆除环境更加强大的保真度，性能优于绝热动力学。 （c）2018年光学学会

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  • 来源
    《Optics Letters》 |2018年第13期|共4页
  • 作者

    Hu Chang-Kang; Cui Jin-Ming; Santos Alan C.; Huang Yun-Feng; Sarandy Marcelo S.; Li Chuan-Feng; Guo Guang-Can;

  • 作者单位

    Univ Sci &

    Technol China CAS Key Lab Quantum Informat Hefei 230026 Anhui Peoples R China;

    Univ Sci &

    Technol China CAS Key Lab Quantum Informat Hefei 230026 Anhui Peoples R China;

    Univ Fed Fluminense Inst Fis Av Gal Milton Tavares de Souza S-N BR-24210346 Niteroi RJ Brazil;

    Univ Sci &

    Technol China CAS Key Lab Quantum Informat Hefei 230026 Anhui Peoples R China;

    Univ Fed Fluminense Inst Fis Av Gal Milton Tavares de Souza S-N BR-24210346 Niteroi RJ Brazil;

    Univ Sci &

    Technol China CAS Key Lab Quantum Informat Hefei 230026 Anhui Peoples R China;

    Univ Sci &

    Technol China CAS Key Lab Quantum Informat Hefei 230026 Anhui Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;光学;
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