L i plu<chr_var letter="s" var="long">∫</chr_var>or tant <chr_abbr type="reg" class="sc" expan="qua" cert="no">q-alpha</chr_abbr> la cort u<chr_abbr type="reg" class="dc" expan="in" cert="no">i-hbar</chr_abbr>dr<chr_abbr type="reg" class="dc" expan="en" cert="no">e-hbar</chr_abbr>t. 