  We study how translationally invariant couplings of many-particle systems and
nonequilibrium baths can be used to rectify particle currents, for which we
consider minimal setups to realize bath-induced currents in nonequilibrium
steady states of one-dimensional open fermionic systems. We first analyze
dissipative dynamics associated with a nonreciprocal Lindblad operator and
identify a class of Lindblad operators that are sufficient to acquire a
unidirectional current. We show that unidirectional particle transport can in
general occur when a Lindblad operator is reciprocal provided that the
inversion symmetry and the time-reversal symmetry of the microscopic
Hamiltonian are broken. We demonstrate this mechanism on the basis of both
analytical and numerical approaches including the Rashba spin-orbit coupling
and the Zeeman magnetic field.
