Electro-optic frequency beam splitters and tritters for high-fidelity photonic quantum information processing

by Hsuan-Hao Lu, Joseph M. Lukens, Nicholas A. Peters, Ogaga D. Odele, Daniel E. Leaird, Andrew M. Weiner, Pavel Lougovski

Experimental frequency splitter and tritter setup.

Electro-optic frequency beam splitter and tritter.


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 (0.99998 + or -0.00003), 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 3 x 3 extension of the Hadamard gate: the balanced tritter. This tritter---the first ever demonstrated for frequency modes---attains fidelity 0.9989 + or -0.0004. These gates represent important building blocks toward scalable, high-fidelity quantum information processing based on frequency encoding.

Bibtek Information 

title = {Electro-Optic Frequency Beam Splitters and Tritters for High-Fidelity Photonic Quantum Information Processing},
author = {Lu, Hsuan-Hao and Lukens, Joseph M. and Peters, Nicholas A. and Odele, Ogaga D. and Leaird, Daniel E. and Weiner, Andrew M. and Lougovski, Pavel},
journal = {Phys. Rev. Lett.},
volume = {120},
issue = {3},
pages = {030502},
numpages = {6},
year = {2018},
month = {Jan},
publisher = {American Physical Society},
doi = {10.1103/PhysRevLett.120.030502},
url = {}

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Publication Citation

Physical Review Letters 2018 pp 030502-1 to 030502-6 January 9, 2018
DOI: 10.1103/PhysRevLett.120.030502