Publications by Alexander Lvovsky

Generation and tomography of arbitrary optical qubits using transient collective atomic excitations.

Optics letters 39 (2014) 5447-5450

T Brannan, Z Qin, A MacRae, AI Lvovsky

We demonstrate the preparation of heralded Fock-basis qubits (a|0〉+b|1〉) from transient collective spin excitations in a hot atomic vapor. The preparation event is heralded by Raman-scattered photons in a four-wave mixing process seeded by a weak coherent optical excitation. The amplitude and phase of the seed field allow arbitrary control over the qubit coefficients. The qubit state is characterized using balanced homodyne tomography.

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