T ant <chr_abbr type="reg" class="dc" expan="que" cert="no">q-hbar</chr_abbr> il uindr<chr_abbr type="reg" class="dc" expan="en" cert="no">e-hbar</chr_abbr>t a la pl<chr_abbr type="reg" class="dc" expan="an" cert="no">a-hbar</chr_abbr>che. 