Quantum Computation and Information Seminar   RSS

22/11/2019, 10:00 — 11:00 — Room P3.10, Mathematics Building
, University of Innsbruck

Macroscopic quantum states: applications and fundamental limitations

The creation of ever larger quantum states that are in a coherent superposition is an experimental challenge of fundamental and practical interest. We report on attempts to characterize such superposition states, and on fundamental limitations to prepare, maintain and detect them. This includes general results on fragility of all macroscopic quantum states under noise, and the need of tremendous measurement devices to detect them. We also consider applications of such states in the context of quantum metrology, and show that noise and imperfections limit the achievable quantum advantage. We discuss methods such as dynamical control or quantum error correction that allow one to overcome some of these limitation, and present noise-resilient methods for optimal sensing of non-local quantities using distributed sensors.

Supported by: Phys-Info (IT), SQIG (IT), CeFEMA and CAMGSD, with funding from FCT, FEDER and EU FP7, specifically through the Doctoral Programme in the Physics and Mathematics of Information (DP-PMI), FCT strategic projects PEst-OE/EEI/LA0008/2013 and UID/EEA/50008/2013, IT project QuSim, project CRUP-CPU CQVibes, the FP7 Coordination Action QUTE-EUROPE (600788), and the FP7 projects Landauer (GA 318287) and PAPETS (323901).


Instituto de TelecomunicaçõesCAMGSDFCT7th Framework Programme