  The transport dynamics of a quenched Luttinger liquid tunnel-coupled to a
fermionic reservoir is investigated. In the transient dynamics, we show that
for a sudden quench of the electron interaction universal power-law decay in
time of the tunneling current occurs, ascribed to the presence of entangled
compound excitations created by the quench. In sharp contrast to the usual non
universal power-law behavior of a zero-temperature non-quenched Luttinger
liquid, the steady state tunneling current is ohmic and can be explained in
terms of an effective quench-activated heating of the system. Our study unveils
an unconventional dynamics for a quenched Luttinger liquid that could be
identified in quenched cold Fermi gases.
