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 …

Interference, which refers to the phenomenon associated with the superposition of waves,
has played a crucial role in the advancement of physics and finds a wide range of …

We derive a bound on the ability of a linear-optical network to estimate a linear combination
of independent phase shifts by using an arbitrary nonclassical but unentangled input state …

Linear optics has seen a resurgence for applications in quantum information processing
owing to its miniaturisation on-chip, and increase in production efficiency and quality of …

Quantum metrology can achieve enhanced sensitivity for estimating unknown parameters
beyond the standard quantum limit. Recently, multiple-phase estimation exploiting quantum …

Distributed quantum metrology has drawn intense interest as it outperforms the optimal
classical counterparts in estimating multiple distributed parameters. However, most schemes …

Phase-estimation protocols provide a fundamental benchmark for the field of quantum
metrology. The latter represents one of the most relevant applications of quantum theory …

The quantum statistical fluctuations of electromagnetic fields establish a limit, known as the
shot-noise limit, on the sensitivity of optical measurements performed with classical …

Together with the more intuitive and commonly recognized conductance mechanisms of
charge‐hop** and tunneling, quantum‐interference (QI) phenomena have been identified …

We introduce a linear optical technique that can implement ideal quantum teleamplification
up to the n th Fock state, where n can be any positive integer. Here teleamplification consists …