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We demonstrate spatial super-resolution, performing an optical centroid measurement on 4-photon N00N states with a scalable 11-detector measurement. Our results show spatial super-resolution with exponentially better detection efficiency than any previous N00N-state experiment.
We measure, using weak measurement, the Bohmian trajectories of one photon that is part of an entangled pair. Our results shed light on the nonlocality of the Bohm model, as well as its so-called “surrealism.”
In quantum state tomography N identically prepared copies of a quantum state are measured to reconstruct a density matrix describing the single particle state [1]. One purpose of reconstructing a density matrix is to allow the prediction of measurements that could have been made on the initial state. On the other hand, if only one measurement is of interest then performing that measurement on the...
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 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.
Quantum process tomography (QPT) is a resource intensive task. We present an experiment in which a 3 dimensional decoherence free subspace is experimentally identified using 36 measurements, instead of the 256 measurements required for QPT.
Quantum process tomography requires a set of input states sensitive to the unknown process. We experimentally generate a class of 4-photon states and compare their sensitivity to that of coherent states to a decohering process.
We use weak measurements to carry out the first direct observation of the trajectories followed by single photons in a two-slit interferometer. The measured trajectories correspond to those predicted by Bohmian mechanics.
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