Robust quantum control for the manipulation of solid-state spins

• URL: http://arxiv.org/abs/2205.02434v1
• Date: Thu, 5 May 2022 04:27:47 GMT
• Title: Robust quantum control for the manipulation of solid-state spins
• Authors: Yifan Zhang, Hao Wu, Xiaodong Yang, Ye-Xin Wang, Chang Liu, Qing Zhao, Jiyang Ma, Jun Li, and Bo Zhang
• Abstract summary: Noise-resilient quantum gates are demonstrated experimentally with nitrogen-vacancy centers in diamond. In the presence of both 10% off-resonant detuning and deviation of a Rabi frequency, we achieve an average single-qubit gate fidelity of up to 99.97%. ROCbased multipulse quantum sensing sequences can suppress spurious responses resulting from finite widths and imperfections of microwave pulses.
• Score: 20.436446451643622
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Robust and high-fidelity control of electron spins in solids is the cornerstone for facilitating applications of solid-state spins in quantum information processing and quantum sensing. However, precise control of spin systems is always challenging due to the presence of a variety of noises originating from the environment and control fields. Herein, noise-resilient quantum gates, designed with robust optimal control (ROC) algorithms, are demonstrated experimentally with nitrogen-vacancy (NV) centers in diamond to realize tailored robustness against detunings and Rabi errors simultaneously. In the presence of both 10% off-resonant detuning and deviation of a Rabi frequency, we achieve an average single-qubit gate fidelity of up to 99.97%. Our experiments also show that, ROCbased multipulse quantum sensing sequences can suppress spurious responses resulting from finite widths and imperfections of microwave pulses, which provides an efficient strategy for enhancing the performance of existing multipulse quantum sensing sequences.

Related papers

• Improved Electron-Nuclear Quantum Gates for Spin Sensing and Control [0.0]
  We develop a generalised DDRF framework that has important implications for spin sensing and control. Our analytical model, which we corroborate by experiments on a single NV center in diamond, reveals the mechanisms that govern the selectivity of gates. We apply these insights to numerically show a 60x sensitivity enhancement for detecting weakly coupled spins.
  arXiv  Detail & Related papers  (2024-09-20T16:13:13Z)
• Quantifying the limits of controllability for the nitrogen-vacancy electron spin defect [0.0]
  Solid-state electron spin qubits rely on control sequences of population inversion to enhance sensitivity and improve device coherence. We show that the limits of population inversion and potential impacts on applications like quantum sensing have not been assessed quantitatively. We identify a potentially realizable regime of nanosecond control duration for high-fidelity multipulse sequences.
  arXiv  Detail & Related papers  (2023-09-06T15:55:21Z)
• Control of an environmental spin defect beyond the coherence limit of a central spin [79.16635054977068]
  We present a scalable approach to increase the size of electronic-spin registers. We experimentally realize this approach to demonstrate the detection and coherent control of an unknown electronic spin outside the coherence limit of a central NV. Our work paves the way for engineering larger quantum spin registers with the potential to advance nanoscale sensing, enable correlated noise spectroscopy for error correction, and facilitate the realization of spin-chain quantum wires for quantum communication.
  arXiv  Detail & Related papers  (2023-06-29T17:55:16Z)
• All-Optical Nuclear Quantum Sensing using Nitrogen-Vacancy Centers in Diamond [52.77024349608834]
  Microwave or radio-frequency driving poses a significant limitation for miniaturization, energy-efficiency and non-invasiveness of quantum sensors. We overcome this limitation by demonstrating a purely optical approach to coherent quantum sensing. Our results pave the way for highly compact quantum sensors to be employed for magnetometry or gyroscopy applications.
  arXiv  Detail & Related papers  (2022-12-14T08:34:11Z)
• Continuous-time dynamics and error scaling of noisy highly-entangling quantum circuits [58.720142291102135]
  We simulate a noisy quantum Fourier transform processor with up to 21 qubits. We take into account microscopic dissipative processes rather than relying on digital error models. We show that depending on the dissipative mechanisms at play, the choice of input state has a strong impact on the performance of the quantum algorithm.
  arXiv  Detail & Related papers  (2021-02-08T14:55:44Z)
• Fast high-fidelity single-qubit gates for flip-flop qubits in silicon [68.8204255655161]
  flip-flop qubit is encoded in the states with antiparallel donor-bound electron and donor nuclear spins in silicon. We study the multilevel system that is formed by the interacting electron and nuclear spins. We propose an optimal control scheme that produces fast and robust single-qubit gates in the presence of low-frequency noise.
  arXiv  Detail & Related papers  (2021-01-27T18:37:30Z)
• Optimal control of a nitrogen-vacancy spin ensemble in diamond for sensing in the pulsed domain [52.77024349608834]
  Defects in solid state materials provide an ideal platform for quantum sensing. Control of such an ensemble is challenging due to the spatial variation in both the defect energy levels and in any control field across a macroscopic sample. We experimentally demonstrate that we can overcome these challenges using Floquet theory and optimal control optimization methods.
  arXiv  Detail & Related papers  (2021-01-25T13:01:05Z)
• Experimentally Realizing Efficient Quantum Control with Reinforcement Learning [2.733342606024131]
  We experimentally demonstrate an alternative approach to quantum control based on deep reinforcement learning (DRL) on a trapped $171mathrmYb+$ ion. In particular, we find that DRL leads to fast and robust digital quantum operations with running time bounded by shortcuts to adiabaticity (STA) Our experiments reveal a general framework of digital quantum control, leading to a promising enhancement in quantum information processing.
  arXiv  Detail & Related papers  (2021-01-22T09:34:58Z)
• Robust Dynamical Decoupling for the Manipulation of a Spin Network via a Single Spin [14.210661851355663]
  We investigate the combination of dynamical decoupling (DD) and robust optimal control (ROC) to address this problem. ROC is employed to find robust shaped pulses, wherein the directional derivatives of the controlled dynamics with respect to control errors are reduced to a desired order. We demonstrate this method in the example of manipulating nuclear spin bath via an electron spin in the NV center system.
  arXiv  Detail & Related papers  (2021-01-11T15:31:43Z)
• Probing the coherence of solid-state qubits at avoided crossings [51.805457601192614]
  We study the quantum dynamics of paramagnetic defects interacting with a nuclear spin bath at avoided crossings. The proposed theoretical approach paves the way to designing the coherence properties of spin qubits from first principles.
  arXiv  Detail & Related papers  (2020-10-21T15:37:59Z)
• Parallel single-shot measurement and coherent control of solid-state spins below the diffraction limit [0.0]
  We experimentally demonstrate high-fidelity control over multiple defects with nanoscale separations using an optical frequency-domain multiplexing technique. We also demonstrate sub-wavelength control over coherent spin rotations using an optical AC Stark shift. The demonstrated approach may be scaled to large numbers of ions with arbitrarily small separation, and is a significant step towards realizing strongly interacting atomic defect arrays.
  arXiv  Detail & Related papers  (2020-06-02T17:55:54Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.