3 papers
quant-ph2026
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…
quant-ph2025
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…
quant-ph2025
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…