Single-Fluid Model for Rotating Annular Supersolids and Its Experimental Implications

Year: 2026

Authors: Preti N., Antolini N., Drevon C., Lombardi P., Fioretti A., Gabbanini C., Ferioli G., Modugno G., Biagioni G.

Autors Affiliation: Univ Firenze, Dipartimento Fis & Astron, Via G Sansone 1, I-50019 Sesto Fiorentino, Italy; European Lab Nonlinear Spect LENS, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy; Ist Nazl Ott Consiglio Nazl Ric INO CNR, Via Moruzzi 1, I-56124 Pisa, Italy; Consiglio Nazl Ric INO CNR, Ist Nazl Ott, Largo Enrico Fermi 2, I-50125 Florence, Italy; Univ Paris Saclay, Inst Opt Grad Sch, CNRS, Lab Charles Fabry, F-91127 Palaiseau, France.

Abstract: The famous two-fluid model of finite-temperature superfluids has been recently extended to describe the mixed classical-superfluid dynamics of the newly discovered supersolid phase of matter. We show that for rigidly rotating supersolids one can derive a more appropriate single-fluid model, in which the seemingly classical and superfluid contributions to the motion emerge from a spatially varying phase of the global wave function. That allows one to design experimental protocols to excite and detect the peculiar rotation dynamics of annular supersolids, including partially quantized supercurrents, in which each atom brings less than h units of angular momentum. Our results are valid for a more general class of density-modulated superfluids.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 136 (3)      Pages from: 36001-1  to: 36001-7

More Information: We thank M. Modugno and A. Alana for providing a code to solve the eGPE equation. We thank T. Dardier for assisting with the simulations in the preliminary phase of the project. Useful discussions with S. Stringari, A. Recati, and the Trento group and with G. Roati and his group are also acknowledged. This work was funded by the European Union (European Research Council, SUPERSOLIDS, Grant No. 101055319). We acknowledge support from the European Union, NextGenerationEU, for the Integrated Infrastructure Initiative in Photonics and Quantum Sciences (I-PHOQS Grant No. IR0000016, ID Grant No. D2B8D520, and CUP Grant No. B53C22001750006) and for PNRR MUR Projec t National Quantum Science and Technology Institute-NQSTI (Partenariato esteso 04: Scienze e Tecnologie Quantistiche-PE 0023, CUP B53C22004180005). G. B. acknowledges support from the European Union’s Horizon Europe research and innovation program under the Marie Sklodowska-Curie Grant Agreement No. 101204101.
KeyWords: Angular-momentum; Superfluid
DOI: 10.1103/8n5y-fyh7