@article {shaham_implementation_2019,
	title = {Implementation of controllable universal unital optical channels},
	journal = {Opt. Express, OE},
	volume = {27},
	number = {17},
	year = {2019},
	note = {Publisher: Optica Publishing Group},
	pages = {23839{\textendash}23848},
	abstract = {We show that a configuration of four birefringent crystals and wave-plates can emulate almost any arbitrary unital channel for polarization qubits encoded in single photons, where the channel settings are controlled by the wave-plate angles. The scheme is applied to a single spatial mode and its operation is independent of the wavelength and the fine temporal properties of the input light. We implemented the scheme and demonstrated its operation by applying a dephasing environment to classical and quantum single-photon states with different temporal properties. The applied process was characterized by a quantum process tomography procedure, and a high fidelity to the theory was observed.},
	keywords = {Crystal orientation, Dephasing, Liquid crystals, Parametric down conversion, Polarization maintaining fibers, quantum information},
	issn = {1094-4087},
	doi = {10.1364/OE.27.023839},
	url = {https://opg.optica.org/oe/abstract.cfm?uri=oe-27-17-23839},
	author = {Shaham, A. and Karni, T. and Eisenberg, H. S.}
}
