caa a22 4500 445365633 CHVBK 20180317142929.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s10909-010-0311-3 doi (NATIONALLICENCE)springer-10.1007/s10909-010-0311-3 Accurate Density Response Function of Superfluid 4He at Freezing Pressure: Is DFT Successful for Superfluid Freezing? [Elektronische Daten] [T. Minoguchi, D. Galli] An accurate density response function χ(q) of superfluid 4He at zero temperature and at freezing pressure, up to about q=8Å−1, has been obtained via dynamic structure factors, S(q,ω), extracted from imaginary time density-density correlation functions computed with an exact Path Integral projector method. A new statistical approach (Vitali et al. in Phys. Rev. B 82:174510, 2010) to inverse problems has been used to extract S(q,ω); contrarily to analogous "analytic continuation” approaches, this new method has been found able to separate a well defined elementary excitation peak from multi-phonon contributions. We have applied density functional theory (DFT) to a superfluid-solid transition with the obtained χ(q). With this accurate input, DFT gives unphysically unstable superfluid against solidification which is consistent with conventional works. We discuss the possible defect of DFT. Springer Science+Business Media, LLC, 2010 Quantum freezing nationallicence Solidification nationallicence DFT nationallicence Density functional theory nationallicence Density response function nationallicence 4He nationallicence Superfluid nationallicence Analytic continuation nationallicence Minoguchi T. Institute of Physics, University of Tokyo, Komaba 3-8-1, 153-8902, Tokyo, Japan aut Galli D. Dipartimento di Fisica, Universitá degli Studi di Milano, Via Celoria 16, 20133, Milano, Italy aut Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/3-4(2011-02-01), 160-166 0022-2291 162:3-4<160 2011 162 10909 https://doi.org/10.1007/s10909-010-0311-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10909-010-0311-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Minoguchi T. Institute of Physics, University of Tokyo, Komaba 3-8-1, 153-8902, Tokyo, Japan aut NATIONALLICENCE 700 1- Galli D. Dipartimento di Fisica, Universitá degli Studi di Milano, Via Celoria 16, 20133, Milano, Italy aut NATIONALLICENCE 773 0- Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/3-4(2011-02-01), 160-166 0022-2291 162:3-4<160 2011 162 10909 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer