9 papers · 1 filter
Quantum speed-up in collisional battery charging
Stella Seah, Martí Perarnau-Llobet, Géraldine Haack +2
We present a collision model for the charging of a quantum battery by identical nonequilibrium qubit units. When the units are prepared in a mixture of energy eigenstates, the ener…
Surpassing the Thermal Cramer-Rao Bound with Collisional Thermometry
Angeline Shu, Stella Seah, Valerio Scarani
In collisional thermometry, a system in contact with the thermal bath is probed by a stream of ancillas. Coherences and collective measurements were shown to improve the Fisher inf…
Maxwell's lesser demon: a quantum engine driven by pointer measurements
Stella Seah, Stefan Nimmrichter, Valerio Scarani
We discuss a self-contained spin-boson model for a measurement-driven engine, in which a demon generates work from thermal excitations of a quantum spin via measurement and feedbac…
Collisional quantum thermometry
Stella Seah, Stefan Nimmrichter, Daniel Grimmer +3
We introduce a general framework for thermometry based on collisional models, where ancillas probe the temperature of the environment through an intermediary system. This allows fo…
Almost thermal operations: inhomogeneous reservoirs
Angeline Shu, Yu Cai, Stella Seah +2
The resource theory of thermal operations explains the state transformations that are possible in a very specific thermodynamic setting: there is only one thermal bath, auxiliary s…
Nonequilibrium Dynamics with Finite-Time Repeated Interactions
Stella Seah, Stefan Nimmrichter, Valerio Scarani
We study quantum dynamics in the framework of repeated interactions between a system and a stream of identical probes. We present a coarse-grained master equation that captures the…