Robust Quantum State Tomography Method for Quantum Sensing

Sensors

Ahmad Farooq¹  Uman Khalid¹  Junaid ur Rehman¹  Hyundong Shin¹ 

[1] Department of Electronics and Information Convergence Engineering, Kyung Hee University, Yongin 17104, Korea;

关键词: quantum state tomography;    depolarizing noise;    quantum sensing;    Heisenberg limit;   

DOI  :  10.3390/s22072669

来源: DOAJ

【 摘 要 】

Reliable and efficient reconstruction of pure quantum states under the processing of noisy measurement data is a vital tool in fundamental and applied quantum information sciences owing to communication, sensing, and computing. Specifically, the purity of such reconstructed quantum systems is crucial in surpassing the classical shot-noise limit and achieving the Heisenberg limit, regarding the achievable precision in quantum sensing. However, the noisy reconstruction of such resourceful sensing probes limits the quantum advantage in precise quantum sensing. For this, we formulate a pure quantum state reconstruction method through eigenvalue decomposition. We show that the proposed method is robust against the depolarizing noise; it remains unaffected under high strength white noise and achieves quantum state reconstruction accuracy similar to the noiseless case.

【 授权许可】

Unknown