Unified picture for spatial, temporal, and channel steering
Roope Uola; Juha-Pekka Pellonpää; Otfried Gühne; Fabiano Lever
Unified picture for spatial, temporal, and channel steering
Roope Uola
Juha-Pekka Pellonpää
Otfried Gühne
Fabiano Lever
AMER PHYSICAL SOC
Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2021042719005
https://urn.fi/URN:NBN:fi-fe2021042719005
Tiivistelmä
Quantum steering describes how local actions on a quantum system can affect another, spacelike separated, quantum state. Lately, quantum steering has been formulated also for timelike scenarios and for quantum channels. We approach all the three scenarios as one using tools from Stinespring dilations of quantum channels. By applying our technique we link all three steering problems one-to-one with the incompatibility of quantum measurements, a result formerly known only for spatial steering. We exploit this connection by showing how measurement uncertainty relations can be used as tight steering inequalities for all three scenarios. Moreover, we show that certain notions of temporal and spatial steering are fully equivalent and prove a hierarchy between temporal steering and macrorealistic hidden variable models.
Kokoelmat
- Rinnakkaistallenteet [19207]