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5 papers · 2 filters
Robust entanglement-based magnetic field sensor beyond the standard quantum limit
Tohru Tanaka, Paul Knott, Yuichiro Matsuzaki +4
Recently, there have been significant developments in entanglement-based quantum metrology. However, entanglement is fragile against experimental imperfections, and quantum sensing…
Hamiltonian Purification
Davide Orsucci, Daniel Burgarth, Paolo Facchi +4
The problem of Hamiltonian purification introduced by Burgarth et al. [D. K. Burgarth et al., Nat. Commun. 5, 5173 (2014)] is formalized and discussed. Specifically, given a set of…
Interference in a two-mode Bose system with particles is typical
P. Facchi, H. Nakazato, S. Pascazio +2
When a Bose-Einstein condensate is divided into two parts, that are subsequently released and overlap, interference fringes are observed. We show here that this interference is typ…
Quantum Computing in Plato's Cave
Daniel Burgarth, Paolo Facchi, Vittorio Giovannetti +3
We show that mere observation of a quantum system can turn its dynamics from a very simple one into a universal quantum computation. This effect, which occurs if the system is regu…
Identifiability of Open Quantum Systems
Daniel Burgarth, Kazuya Yuasa
We provide a general framework for the identification of open quantum systems. By looking at the input-output behavior, we try to identify the system inside a black box in which so…