Title:	Nonreciprocal electrical transport in linear systems with balanced gain and loss in the bulk
Authors:	Bag, Rupak Roy, Dibyendu
Issue Date:	10-Feb-2025
Publisher:	American Physical Society
Citation:	Physical Review B, 2025, Vol. 111, p064309
Abstract:	We investigate electrical transport in a quantum wire of 𝑁 sites connected to an equal number (𝑁𝑖/2) of sources and drains of charges in bulk. Each source and drain injects and extracts charges at the same rate, respectively. We show that the linear-response electrical current is nonreciprocal in such a system when the arrangement of sources and drains breaks the system's parity. We prove that inelastic scattering is essential for nonreciprocity in this system. For this, we invoke a master equation description of classical charge transport in a similar system. The nonreciprocal current in quantum wire matches that in the classical model for 𝑁𝑖/𝑁∼1, generating a finite scattering length much smaller than the length of the wire. The nonreciprocity in the quantum wire oscillates with wire length when 𝑁𝑖/𝑁≪1, and it can vanish at specific lengths.
Description:	Open Access
URI:	http://hdl.handle.net/2289/8374
Alternative Location:	https://arxiv.org/abs/2409.12510 https://doi.org/10.1103/PhysRevB.111.064309
Copyright:	2025 American Physical Society
Appears in Collections:	Research Papers (TP)

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