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</o:shapelayout></xml><![endif]--></head><body lang=RU link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Dear Quantum Espresso community!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I’ve found in the mailing list archive that “the dielectric constant computed by ph.x is the static (high-frequency) dielectric constant of the system (also referred as \epsilon_\infty in the literature) . One need to combine it with phonon results in order to compute \epsilon_0, the real static dielectric constant including also ionic polarization.” As my aim is to calculate \epsilon_0, do I understand correctly that if I run a ph.x calculation with epsil=.true and trans=.false, the output will contain epsilon_\infty and if I run with epsil=.true and trans=.true, the output will contain \epsilon_0? <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Best regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Anton Filanovich,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Ural Federal University.<o:p></o:p></span></p></div></body></html>