Electro-Optic Frequency Beamsplitters and Tritters for High-Fidelity Photonic Quantum Information Processing
arXiv:1712.03992 · doi:10.1103/PhysRevLett.120.030502
Abstract
We report experimental realization of high-fidelity photonic quantum gates for frequency-encoded qubits and qutrits based on electro-optic modulation and Fourier-transform pulse shaping. Our frequency version of the Hadamard gate offers near-unity fidelity (), requires only a single microwave drive tone for near-ideal performance, functions across the entire C-band (1530-1570 nm), and can operate concurrently on multiple qubits spaced as tightly as four frequency modes apart, with no observable degradation in the fidelity. For qutrits we implement a extension of the Hadamard gate: the balanced tritter. This tritter---the first ever demonstrated for frequency modes---attains fidelity . These gates represent important building blocks toward scalable, high-fidelity quantum information processing based on frequency encoding.
10 pages, 6 figures
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