Thermodynamics at zero temperature: inequalities for the ground state of a quantum many-body system

N. Il'in, E. Shpagina, O. Lychkovskiy

We prove that for a single-component many-body system at zero temperature the inequality $E_{\mathrm{int}}\le PV$ holds, where $E_{\mathrm{int}}$ is the interaction energy, $P$ is pres…