Foundations of Physics

, Volume 47, Issue 2, pp 161–173 | Cite as

Quantum States as Objective Informational Bridges

  • Richard Healey


A quantum state represents neither properties of a physical system nor anyone’s knowledge of its properties. The important question is not what quantum states represent but how they are used—as informational bridges. Knowing about some physical situations (its backing conditions), an agent may assign a quantum state to form expectations about other possible physical situations (its advice conditions). Quantum states are objective: only expectations based on correct state assignments are generally reliable. If a quantum state represents anything, it is the objective probabilistic relations between its backing conditions and its advice conditions. This paper offers an account of quantum states and their function as informational bridges, in quantum teleportation and elsewhere.


Quantum state Quantum information Quantum teleportation  Delayed-choice entanglement-swapping EPR-Bohm correlations 


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.University of ArizonaTucsonUSA

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