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Deterministic quantum information processing will require hybrid quantum systems like an interface between microwave and optical photons. We propose a scheme for efficient, multimode and coherent microwave-optical conversion based on frequency mixing in Rydberg atoms.
We show the highest (>105) and longest-lived (>3 hours) optical depths of alkali vapours in hollow-core photonic crystal fibres, which we will use to implement a novel noiseless broadband quantum memory scheme for temporal multiplexing.
We report on our experimental progress towards observing weak-value amplification of low-light-level cross-phase modulation which will be the first observation of a weak measurement relying on true entanglement between distinct systems.
We experimentally show that giant EIT-based Kerr nonlinearities may make use of EIT windows narrower than the signal bandwidth, allowing for experiments with short signal pulses to benefit from this enhancement, e.g. for QND measurements.
We present a multidimensional quantum communication scheme based on temporal phase modulation where the Hilbert space is spanned by an orthonormal set of temporal profiles.
We propose a scheme for weak-value amplification of probing a single-fermion interaction, and demonstrate it theoretically on quantum dot electron spins by mapping the state including energy and spin into a photon.
We show theoretically that weak-value amplification can enhance the signal-to-noise ratio in the presence of noise with long correlation times, in particular for measurements of single-photon-level nonlinearities.
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