Dipartimento di Fisica Sapienza Università di Roma
Quantum metrology is one of the most relevant applications of quantum information theory to quantum technologies. Here, quantum probes are exploited to overcome classical bounds in the estimation of unknown parameters. In this context, phase estimation, where the unknown parameter is a phase shift between two modes of a quantum system, is a fundamental problem. … Continua a leggere
Multi-particle interference is a key resource for quantum information processing, as exemplified by Boson Sampling. Hence, given its fragile nature, an essential desideratum is a solid and reliable framework for its validation. However, while several protocols have been introduced to this end, the approach is still fragmented and fails to build a big picture for … Continua a leggere
The image of the cover for AVS quantum science Volume 2 issue 2, provides a representation of a basic tool for photonic quantum phase estimation: the Mach-Zehnder interferometer. Here interfering quantum states of light can be exploited to extract information on unknown relative phase shifts, enhancing the sensitivity achievable by classical resources. The cover image … Continua a leggere
Quantum metrology is one of the most promising applications of quantum technologies. The aim of this research field is the estimation of unknown parameters exploiting quantum resources, whose application can lead to enhanced performances with respect to classical strategies. Several physical quantum systems can be employed to develop quantum sensors, and photonic systems represent ideal … Continua a leggere