Abstract
We propose a setup that is the spin analog of the charge-based quantum circuit. We define and compute the spin capacitance and the spin resistance of the circuit for both ferromagnetic and antiferromagnetic systems. We find that the antiferromagnetic setup has universal properties, but the ferromagnetic setup does not. We discuss how to use the proposed setup as a quantum source of spin excitations, and put forward two possible experimental realizations, using either ultracold atoms in optical lattices or artificially engineered atomic-spin chains.
- Received 27 January 2014
DOI:https://doi.org/10.1103/PhysRevLett.113.037201
© 2014 American Physical Society