Optimized three-level quantum transfers based on frequency-modulated optical excitations

Year: 2020

Authors: Petiziol F., Arimondo E., Giannelli L., Mintert F., Wimberger S.

Autors Affiliation: Univ Parma, Dept Math Phys & Comp Sci, Parco Area Sci 7A, I-43124 Parma, Italy; Natl Inst Nucl Phys INFN, Milano Bicocca Sect, Parma Grp, Parco Area Sci 7A, I-43124 Parma, Italy; Univ Pisa, Dept Phys, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy; INO CNR, Via G Moruzzi 1, I-56124 Pisa, Italy; Univ Saarland, Theoret Phys, D-66123 Saarbrucken, Germany; Imperial Coll, Dept Phys, London SW7 2AZ, England.

Abstract: The difficulty in combining high fidelity with fast operation times and robustness against sources of noise is the central challenge of most quantum control problems, with immediate implications for the realization of quantum devices. We theoretically propose a protocol, based on the widespread stimulated Raman adiabatic passage technique, which achieves these objectives for quantum state transfers in generic three-level systems. Our protocol realizes accelerated adiabatic following through the application of additional control fields on the optical excitations. These act along frequency sidebands of the principal adiabatic pulses, dynamically counteracting undesired transitions. The scheme facilitates experimental control, not requiring new hardly-accessible resources. We show numerically that the method is efficient in a very wide set of control parameters, bringing the timescales closer to the quantum speed limit, also in the presence of environmental disturbance. These results hold for complete population transfers and for many applications, e.g., for realizing quantum gates, both for optical and microwave implementations. Furthermore, extensions to adiabatic passage problems in more-level systems are straightforward.

Journal/Review: SCIENTIFIC REPORTS

Volume: 10 (1)      Pages from: 2185-1  to: 2185-12

More Information: The authors warmly thank Donatella Ciampini and Giovanna Morigi for useful discussions, and acknowledge financial support within the Imperial College European Partners programme. F.P. acknowledges financial support from the Leonardo da Vinci mobility program promoted by CRUI-MIUR. L.G. has been supported by the European Commission (ITN ColOpt) and by the German Ministry of Education and Research (BMBF) via the QuantERA project NAQUAS. Project NAQUAS has received funding from the QuantERA ERA-NET Cofund in Quantum Technologies implemented within the European Union’s Horizon 2020 program.
KeyWords: adiabaticity; article; excitation; microwave radiation; velocity
DOI: 10.1038/s41598-020-59046-8

Citations: 18
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