article published yes Fabian Brauneis author Timothy G. Backert author Simeon I. Mistakidis author Mikhail Lemeshko author 37CB05FA-F248-11E8-B48F-1D18A9856A870000-0002-6990-7802 Hans Werner Hammer author Artem Volosniev author 37D278BC-F248-11E8-B48F-1D18A9856A870000-0003-0393-5525 MiLe department ISTplus - Postdoctoral Fellowships project Angulon: physics and applications of a new quasiparticle project We investigate the ground-state properties of weakly repulsive one-dimensional bosons in the presence of an attractive zero-range impurity potential. First, we derive mean-field solutions to the problem on a finite ring for the two asymptotic cases: (i) all bosons are bound to the impurity and (ii) all bosons are in a scattering state. Moreover, we derive the critical line that separates these regimes in the parameter space. In the thermodynamic limit, this critical line determines the maximum number of bosons that can be bound by the impurity potential, forming an artificial atom. Second, we validate the mean-field results using the flow equation approach and the multi-layer multi-configuration time-dependent Hartree method for atomic mixtures. While beyond-mean-field effects destroy long-range order in the Bose gas, the critical boson number is unaffected. Our findings are important for understanding such artificial atoms in low-density Bose gases with static and mobile impurities. https://research-explorer.ista.ac.at/download/11590/11594/2022_NewJournalPhysics_Brauneis.pdf application/pdfno IOP Publishing2022 eng 1367-2630 00081853000000110.1088/1367-2630/ac78d8 246 F. Brauneis, T.G. Backert, S.I. Mistakidis, M. Lemeshko, H.W. Hammer, A. Volosniev, New Journal of Physics 24 (2022). F. Brauneis, T. G. Backert, S. I. Mistakidis, M. Lemeshko, H. W. Hammer, and A. Volosniev, “Artificial atoms from cold bosons in one dimension,” <i>New Journal of Physics</i>, vol. 24, no. 6. IOP Publishing, 2022. Brauneis F, Backert TG, Mistakidis SI, Lemeshko M, Hammer HW, Volosniev A. 2022. Artificial atoms from cold bosons in one dimension. New Journal of Physics. 24(6), 063036. Brauneis F, Backert TG, Mistakidis SI, Lemeshko M, Hammer HW, Volosniev A. Artificial atoms from cold bosons in one dimension. <i>New Journal of Physics</i>. 2022;24(6). doi:<a href="https://doi.org/10.1088/1367-2630/ac78d8">10.1088/1367-2630/ac78d8</a> Brauneis, Fabian, Timothy G. Backert, Simeon I. Mistakidis, Mikhail Lemeshko, Hans Werner Hammer, and Artem Volosniev. “Artificial Atoms from Cold Bosons in One Dimension.” <i>New Journal of Physics</i>. IOP Publishing, 2022. <a href="https://doi.org/10.1088/1367-2630/ac78d8">https://doi.org/10.1088/1367-2630/ac78d8</a>. Brauneis, F., Backert, T. G., Mistakidis, S. I., Lemeshko, M., Hammer, H. W., &#38; Volosniev, A. (2022). Artificial atoms from cold bosons in one dimension. <i>New Journal of Physics</i>. IOP Publishing. <a href="https://doi.org/10.1088/1367-2630/ac78d8">https://doi.org/10.1088/1367-2630/ac78d8</a> Brauneis, Fabian, et al. “Artificial Atoms from Cold Bosons in One Dimension.” <i>New Journal of Physics</i>, vol. 24, no. 6, 063036, IOP Publishing, 2022, doi:<a href="https://doi.org/10.1088/1367-2630/ac78d8">10.1088/1367-2630/ac78d8</a>. 115902022-07-17T22:01:55Z2025-04-14T07:43:58Z