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Coherent state superpositions, also known as Schrödinger cat states, are widely recognized as promising resources in quantum information, quantum metrology, as well as fundamental tests [1]. In the pseudo-orthogonal basis {|γ〉} of coherent states, these superpositions are given by |κ±(γ)〉 = N±(|y> ± | − y〉) where N± is the normalization factor and the sign (±) of the superposition refers to the...
We use squeezed states of light to implement a robust continuous variable quantum key distribution scheme and an optical Hadamard gate based on coherent state qubits.
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