Single-photon time-encoded ebits: remote preparation and homodyne tomography characterization

M. D'Angelo, A. Zavatta, V. Parigi, M. Bellini, Ronald E. Meyers, Yanhua Shih, Keith S. Deacon
2006 Quantum Communications and Quantum Imaging IV  
We present a review of our recent studies concerning remotely prepared entangled bits (ebits) made of a single photon coherently delocalized between two well-separated temporal modes (or time bins). The preparation scheme represents a remotely tunable source for tailoring arbitrary ebits, whether maximally or non-maximally entangled, which is highly desirable for applications in quantum information technology. The remotely prepared ebit is analyzed by performing both single-mode and two-mode
more » ... ode and two-mode homodyne tomography with the ultra-fast balanced homodyne detection scheme recently developed in our lab. Beside the non-classical behavior typical of single-photon Fock states (negative values around the origin), the reconstructed two-mode Wigner function is found to be characterized by an intriguing phase and by correlations between the two distant time bins sharing the single photon.
doi:10.1117/12.680451 fatcat:hy7h6edqbfdfrf2vwcqi6q5l3m