2024/05/25 by Qi Chai, Wen Yang, Chai, Qi +1
Computer Science · Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #Quantum Information and Cryptography #Quantum Physics (quant-ph) #Quantum and electron transport phenomena
paper · pdf · doi:10.48550/arxiv.2405.16018
openalex publication_date 2024/05/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Identifying quantum resources for quantum sensing is of paramount importance. Up to date, two quantum resources has been widely recognized: the number N of entangled quantum probes and the coherent evolution time T. Here we identify the spin quantum number S of high-spin systems as another quantum resource, which can improve the sensing precision of magnetic field according to the Heisenberg scaling in the absence of noises. Similar to the case of N and T, the utility of S may be degraded by environmental noises. We analyze this point sysmatically under the Ornstein-Uhlenbeck noise (a prevalent noise in realistic physical systems). We find that the utility of S vanishes in Markovian noises, but survives in non-Markovian noises, where it improves the sensing precision according to the classical scaling 1/√(S). Super-classical scaling can be achieved by suitable control of the high-spin system.