2 papers
quant-ph2026
Excitation Flow, Positivity, and Fisher Information for Open Subsystems of an -Qubit Network
Tommy Chin, Sarah Shandera
We derive closed-form propagators for any -qubit subsystem of a closed -qubit network with a single conserved excitation. A single transition amplitude simultaneously control…
quant-ph2024
Effective dynamics of qubit networks via phase-covariant quantum ensembles
Sean Prudhoe, Unnati Akhouri, Tommy Chin +1
We derive a new constructive procedure to rapidly generate ensembles of phase-covariant dynamical maps that may be associated to the individual spins of a closed quantum system. We…