Abstract:In this paper we present quantum key distribution protocol that, instead of single qubits, uses mesoscopic coherent states of light |α to encode bit values of a randomly generated key. Given the reference value α ∈ C, and a string of phase rotations each randomly taken from a set of 2M equidistant phases, Alice prepares a quantum state given by a product of coherent states of light, such that a complex phase of each pulse is rotated by the corresponding phase rotation. The encoding of i-th bit of the key r = r… Show more
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