2015/12/04 by Leigh M. Norris, Leigh Norris, Gerardo A. Paz-Silva +1 · 6 citations
Computer Science · Physics and Astronomy · #Computational physics #Computer science #Dephasing #Gaussian #Mechanical and Optical Resonators #Noise (video) #Observable #Physics #Quantum #Quantum Information and Cryptography #Quantum mechanics #Quantum optics and atomic interactions #Qubit #Statistical physics #quant-ph
paper · pdf · doi:10.1103/physrevlett.116.150503
published as Phys. Rev. Lett. 116, 150503 (2016) · 11 pages, 4 figures
arxiv created 2015/12/04 · openalex publication_date 2016/04/14 · arxiv updated 2016/04/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We introduce open-loop quantum control protocols for characterizing the spectral properties of non-Gaussian noise, applicable to both classical and quantum dephasing environments. By engineering a multidimensional frequency comb via repetition of suitably designed pulse sequences, the desired high-order spectra may be related to observable properties of the qubit probe. We prove that access to a high time resolution is key to achieving spectral reconstruction over an extended bandwidth, overcoming the limitations of existing schemes. Non-Gaussian spectroscopy is demonstrated for a classical noise model describing quadratic dephasing at an optimal point, as well as a quantum spin-boson model out of equilibrium. In both cases, we obtain spectral reconstructions that accurately predict the qubit dynamics in the non-Gaussian regime.