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Symmetries in Quantum Key Distribution and the Connection between Optimal Attacks and Optimal Cloning
Agnes Ferenczi, Norbert Lütkenhaus
We investigate the connection between the optimal collective eavesdropping attack and the optimal cloning attack where the eavesdropper employs an optimal cloner to attack the quan…
Efficient Heralding of Photonic Qubits with Apllications to Device Independent Quantum Key Distribution
David Pitkänen, Xiongfeng Ma, Ricardo Wickert +2
We present an efficient way of heralding photonic qubit signals using linear optics devices. First we show that one can obtain asymptotically perfect heralding and unit success pro…
Strong quantitative benchmarking of quantum optical devices
Nathan Killoran, Norbert Lütkenhaus
Quantum communication devices, such as quantum repeaters, quantum memories, or quantum channels, are unavoidably exposed to imperfections. However, the presence of imperfections ca…