Long-wavelength optical lattices from optical beatnotes: Theory and applications

Year: 2025

Authors: Petrucciani T., Santoni A., Mazzinghi C., Trypogeorgos D., Minardi F., Fattori M., Modugno M.

Autors Affiliation: Ist Nazl Ottica Consiglio Nazl Ric CNR INO, Largo Enrico Fermi 6, I-50125 Florence, Italy; Univ Naples Federico II, Via Cinthia 21, I-80126 Naples, Italy; European Lab Nonlinear Spect LENS, Via N Carrara 1, I-50019 Sesto Fiorentino, Italy; Consiglio Nazl Ric CNR Nanotec, Inst Nanotechnol, Via Monteroni 165, I-73100 Lecce, Italy; Univ Bologna, Dipartimento Fis & Astron, Viale C Berti Pichat 6-2, I-40127 Bologna, Italy; Univ Florence, Dept Phys, Via Sansone 1, I-50019 Sesto Fiorentino, Italy; Univ Basque Country UPV EHU, Dept Phys, Bilbao 48080, Spain; Basque Fdn Sci, IKERBASQUE, Bilbao 48009, Spain; Univ Basque Country UPV EHU, EHU Quantum Ctr, Leioa 48940, Biscay, Spain.

Abstract: We present a theoretical analysis of BeatNote Superlattices (BNSLs), a recently demonstrated technique for generating periodic trapping potentials for ultracold atomic clouds, with arbitrarily large lattice spacings while maintaining interferometric stability. By combining two optical lattices with slightly different wavelengths, a beatnote intensity pattern is formed, generating, for low depths, an effective lattice potential with a periodicity equal to the wavelength associated to the difference between the wave vectors of the two lattices. We study the range of lattice depths and wavelengths under which this approximation is valid and investigate its robustness against perturbations. We present a few examples where the use of BNSLs could offer significant advantages in comparison to well-established techniques for the manipulation of ultracold atomic gases. Our results highlight the potential of BNSLs for quantum simulation, atom interferometry, and other applications in quantum technologies.

Journal/Review: PHYSICAL REVIEW A

Volume: 112 (4)      Pages from: 43323-1  to: 43323-16

More Information: We acknowledge discussions with M. Landini, E. Kir ilov, and G. Valtolina. We acknowledge financial support by the project SQUEIS of the QuantERA ERA-NET Cofund in Quantum Technologies (Grant Agreements No. 731473 and No. 101017733) implemented within the European Unions Horizon 2020 Program. We also acknowledge the financial support of the Italian Ministry of Universities and Research under the PRIN2022 project Quantum sensing and precision measurements with nonclassical states. M.M. acknowledges support from Grant No. PID2021-126273NB-I00 funded by MCIN/AEI/10.13039/501100011033 and by ERDF A way of making Europe, and from the Basque Government through Grant No. IT1470-22. Finally, the project has been co-funded by the European Union-Next Generation EU under PNRR MUR Project No. PE0000023-NQSTI and under the I-PHOQS Integrated Infrastructure Initiative in Photonic and Quantum Sciences.
KeyWords: Interferometry; Atoms; Phase
DOI: 10.1103/zpxp-btt5