2020/12/31 by Yadong Wu, Ya-Dong Wu, Ge Bai +2
Computer Science · Mathematics · Physics and Astronomy · #Computer science #Continuous variable #Mathematical analysis #Mathematical optimization #Mathematics #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum mechanics #Statistical physics #Variable (mathematics) #quant-ph
paper · pdf · doi:10.1103/physrevlett.126.240503
published as Phys. Rev. Lett. 126, 240503 (2021)
arxiv created 2021/06/16 · openalex publication_date 2021/06/16 · arxiv updated 2021/06/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Continuous-variable quantum information, encoded into infinite-dimensional quantum systems, is a promising platform for the realization of many quantum information protocols, including quantum computation, quantum metrology, quantum cryptography, and quantum communication. To successfully demonstrate these protocols, an essential step is the certification of multimode continuous-variable quantum states and quantum devices. This problem is well studied under the assumption that multiple uses of the same device result in identical and independently distributed (i.i.d.) operations. However, in realistic scenarios, identical and independent state preparation and calls to the quantum devices cannot be generally guaranteed. Important instances include adversarial scenarios and instances of time-dependent and correlated noise. In this Letter, we propose the first set of reliable protocols for verifying multimode continuous-variable entangled states and devices in these non-i.i.d scenarios. Although not fully universal, these protocols are applicable to Gaussian quantum states, non-Gaussian hypergraph states, as well as amplification, attenuation, and purification of noisy coherent states.