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Achieving photon-photon interactions is one of the main objectives of the quantum information technology community, since these interactions provide the basis for deterministic quantum gates with high fidelity. In the last few years new milestones in creating phase-shifts [1] and quantum gates[2] have been achieved. Researching resource-moderate experimental realizations for the future development...
We extended the seminal experiment of Banaszek et al. of quantum tomography by photon counting without Radon transform postprocessing to the more general case of photon fluxes with more than one photon per detection time.
We report progress towards information-efficient quantum imaging. We implemented a 4-mode interferometer (Fig.1) which uses both polarization and spatial encoding to image Hadamard-encoded phase arrays. We used this interferometer with a single-photon source to achieve the theoretical goal of Photon Information Efficiency (PIE)= 2 bits per photon (bpp). This demonstration is a particular case of a...
Toward the implementation of universal quantum computing in the optical frequency comb, we recently demonstrated the entanglement of 60 cavity modes of a single optical parametric oscillator into 15 independent quadripartite ring cluster states.
We report the simultaneous experimental generation of multiple quadripartite continuous-variable cluster states in the optical frequency comb of a single optical parametric oscillator operating below threshold.
We study the effect of pump depletion in a single type-I optical parametric oscillator (OPO) and find that pump-mediated, signal-field quantum correlations generate multipartite entanglement in the optical frequency comb of the OPO.
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