论文标题
稳健有效的高维量子层析成像
Robust and Efficient High-dimensional Quantum State Tomography
论文作者
论文摘要
随着量子系统大小的增加，希尔伯特空间中的指数增长意味着系统尺寸d的准确表征变得更加困难。 We show that self-guided tomography is a practical, efficient, and robust technique of measuring higher-dimensional quantum states. Qutrits（d = 3）和Ququints（d = 5）的忠诚度超过99.9％，而Quvigints（d = 20）则超过99.1％，这是有史以来实现的最高值。 We demonstrate robustness against experimental sources of noise, both statistical and environmental.该技术适用于从Qubits集合到单个Qudits以及任何物理实现的任何高维系统，无论是光子，超导，离子或旋转。
The exponential growth in Hilbert space with increasing size of a quantum system means that accurately characterising 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 realised for qudits. 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 realisation, be it photonic, superconducting, ionic, or spin.
