6 papers
Universal composite phase gates with tunable target phase
Peter Chernev, Mouhamad Al-Mahmoud, Andon A. Rangelov
We present a systematic method for constructing universal composite phase gates with a continuously tunable target phase. Using a general Cayley--Klein parametrization of the singl…
Robust population transfer by a detuning sign jump: from two-state quantum system to SU(2)-symmetric three-state quantum system
Peter Chernev, Andon A. Rangelov
We propose and analyze a robust population-transfer protocol in a driven two-level system based on a sudden sign change of the detuning at the maximum of a smooth coupling pulse. A…
Arbitrary polarization retarders and polarization controllers, constructed from sequences of half-wave and quarter-wave plates
Hayk L. Gevorgyan, Andon A. Rangelov
We theoretically introduce several types of arbitrary polarization retarders constructed from sequences of half-wave and quarter-wave plates, each rotated at specific angles. By in…
Complete and robust population transfer between the two ground states of a three-state loop quantum system by amplitude composite pulse control
Peter Chernev, Andon A. Rangelov
This work presents a method for achieving complete, robust, and efficient population transfer between the two ground states in a three-level loop quantum system. The approach utili…
Four-wave plate composite polarization controller
Hristina Hristova, Hristo Iliev, Ivayla Bozhinova +2
We theoretically propose and experimentally demonstrate a novel composite polarization controller. With our design, which comprises two half-wave plates and two quarter-wave plates…
Tunable broadband polarization retarders
Hristina S. Hristova, Svetoslav S. Ivanov, Nikolay V. Vitanov +1
We theoretically propose a type of tunable polarization retarder, which is composed of sequences of half-wave and quarter-wave polarization retarders, allowing operation at broad s…