Noisy frequency estimation with noisy probes

• Published in: New journal of physics Vol. 20; no. 8; pp. 83008 - 83021
• Main Authors: Górecka, Agnieszka, Pollock, Felix A, Liuzzo-Scorpo, Pietro, Nichols, Rosanna, Adesso, Gerardo, Modi, Kavan
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 07.08.2018
• Subjects: frequency estimation; mixed states; Noise; open quantum systems; Permutations; Physics; Purity; quantum metrology; Qubits (quantum computing)

We consider frequency estimation in a noisy environment with noisy probes. This builds on previous studies, most of which assume that the initial probe state is pure, while the encoding process is noisy, or that the initial probe state is mixed, while the encoding process is noiseless. Our work is m...