Work

Spin amplification in realistic systems

Year: 2026

Type: article

Abstract: Spin amplification is the process that ideally increases the number of excited spins when one of them is excited initially. We show that by applying optimal control techniques to design classical drive pulse shapes, spin amplification can be achieved in a previously unexplored fast regime, with amplification times comparable to the intrinsic interaction timescale. This is an order of magnitude faster than the previous protocols and makes spin amplification possible even with significant decoherence and inhomogeneity in the spin system. The initial spin excitation can be delocalized over the entire ensemble, which is a more typical situation when a photon is collectively absorbed by the spins. We focus on the superconducting persistent-current artificial atoms and the Rydberg atoms as spins.

Source: Physical Review Research

DOI: 10.1103/4nqk-9t5s

Authors: Ivan Iakoupov, Victor M. Bastidas, Yuichiro Matsuzaki, Shiro Saito, William J. Munro

Institutions: Okinawa Institute of Science and Technology Graduate University, NTT (Japan), NTT Basic Research Laboratories, Chuo University

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,625

Funder: Okinawa Institute of Science and Technology Graduate University