• DOI:10.1103/PhysRevLett.126.100402
• Corpus ID: 222125070

Robust and Efficient High-Dimensional Quantum State Tomography.

@article{Rambach2021RobustAE,
  title={Robust and Efficient High-Dimensional Quantum State Tomography.},
  author={Markus Rambach and Mahdi Qaryan and Michael Kewming and Christopher Ferrie and Andrew G. White and Jacquiline Romero},
  journal={Physical review letters},
  year={2021},
  volume={126 10},
  pages={
          100402
        }
}

• M. Rambach, Mahdi Qaryan, +3 authors J. Romero
• Published 1 October 2020
• Physics
• Physical review letters

The exponential growth in Hilbert space with increasing size of a quantum system means that accurately characterizing the system becomes significantly harder with system dimension d. We show that self-guided tomography is a practical, efficient, and robust technique of measuring higher-dimensional quantum states. The achieved fidelities are over 99.9% for qutrits (d=3) and ququints (d=5), and 99.1% for quvigints (d=20)-the highest values ever realized for qudit pure states. We also show excellent performance for mixed states, achieving average fidelities of 96.5% for qutrits. We demonstrate robustness against experimental sources of noise, both statistical and environmental. The technique is applicable to any higher-dimensional system, from a collection of qubits through to individual qudits, and any physical realization, be it photonic, superconducting, ionic, or spin.