3 papers
quant-ph2026
Parrondo-type enhancement of quantum-state transfer in spin chains
Rafael Vieira, Edgard P. M. Amorim
Spin chains have been widely studied as quantum channels for short-distance communication in quantum devices, where many-body dynamics can mediate quantum-state transfer between di…
quant-ph2026
Barenco gate implementation using driven two- and three-qubit spin chains
Rafael Vieira, Edgard P. M. Amorim
We propose a protocol for implementing Barenco-type multi-qubit controlled gates using short driven spin chains. Starting from an Ising interaction with a transverse drive on the l…
quant-ph2026
Control of vertex probability via edge-weight modulation in continuous-time quantum walks
Rafael Vieira, Edgard P. M. Amorim
Continuous-time quantum walks (CTQWs) provide a versatile framework for exploring quantum transport on graphs. In this work, we investigate how the introduction of edge-weight modu…