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We are developing an experimental setup to deterministically create single photons using spontaneous downconversion. We expect our source to output a single photon with a probability of 70%, and two photons with less than 3%.
We describe a complete continuous variable quantum key distribution setup, reaching more than 2 kbit/s over 25 km. Time-multiplexing is used, and reconciliation is performed using fast and efficient LDPC error correcting codes.
We demonstrate a bright, narrowband, compact single-crystal source of polarization entangled photon pairs at non-degenerate wavelength. This work is instrumental for quantum key distribution and entanglement transfer from photonic to atomic qubits.
We demonstrate a fully functioning and portable QKD system based on polarisation entanglement for long time usage. We further show the distribution of secure keys a rate of 1 kbit/s over 25 km for 24 hours.
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