2026-06-01T19:05:28Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/1153182025-08-05T17:16:02Zcom_20.500.14352_14col_20.500.14352_15

Two-qubit quantum gates with minimal pulse sequences Sola Reija, Ignacio Shin, Seokmin Chang, Bo Y. 544 Atomic & molecular processes in external fields Cold gases in optical lattices Quantum circuits Quantum computation Quantum control Quantum protocols Rydberg gases Física de materiales 2207 Física Atómica y Nuclear 2209 Óptica Working with trapped atoms at a close distance to each other, we show that one can implement entangling gates based on nonindependent qubits using a single pulse per qubit, or a single structured pulse. The optimal parameters depend on approximate solutions of Diophantine equations, causing the fidelity to never be exactly one, even under ideal conditions, although the errors can be made arbitrarily smaller at the cost of stronger fields. We fully characterize the mechanism by which the gates operate and study the effects of thermal motion and intensity fluctuations in the laser beams for different physical implementations of the gates. If instead of one pulse, we control the system with a two-pulse sequence, a plethora of mechanisms become possible where one can choose the optimal parameters from a wide range of values to achieve high-fidelity gates that are more protected from the effects of laser intensity fluctuations. Quantum Computing Technology Development Program Ministerio de Ciencia e Innovación (España) European Commission Depto. de Química Física Fac. de Ciencias Químicas TRUE pub 2025-01-21T10:59:37Z 2025-01-21T10:59:37Z 2024 journal article VoR https://hdl.handle.net/20.500.14352/115318 XXXX-XXXX 10.1103/PhysRevA.109.052603 eng NRF- 2020M3E4A1079793 PID2021-122796NB-I00 NRF-2021R1A5A1030054 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ restricted access application/pdf American Physical Society