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A foundation of quantum mechanics is that quantum objects can exhibit both particle-like and wave-like behaviour. Uncovering particular behaviour depends largely on the type of detector used. In an optical setting, photon counting and homodyne detection are typically used to expose particle and wave phenomena, respectively. Recently, weak-field homodyne detection was demonstrated [1], whereby photonic...
Nonclassical states of light are necessary resources for quantum technologies such as cryptography, computation and the definition of metrological standards. Distinguishing nonclassical states from those that can be described without invoking quantum mechanics is both a necessary practical task and of fundamental interest. In general, signatures of nonclassicality arise from apparently pathological...
We report the storage and retrieval of broadband optical pulses using a Raman interaction in a room-temperature ensemble of cesium atoms confined in a hollow-core photonic-crystal fibre.
We report the experimental estimation of the Kerr coefficient of an optical fiber. Using bright classical fields and shot-noise-limited detection, we show the precision scaling of 1/N3/2 in a room-temperature, all-optical system.
Without deterministic single photon sources, multiphoton rates fall exponentially with the number of photons required, making practical photonics unfeasible. We show how quantum memories improve multiphoton rates by many orders of magnitude.
We demonstrate a method to transmute classical light into a quantum state without invoking any nonlinear optical processes. Using a tunable beam splitter and photon number resolving measurement, we create a novel non-Gaussian state.
We report the preparation and storage of frequency-uncorrelated cavity-enhanced SPDC entangled photons. The frequency correlation is eliminated with a suitable pulsed pump. The storage of a single photon entangled with another flying photon is demonstrated.
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