"No Information Without Disturbance": Quantum Limitations of Measurement
Paul Busch
TL;DR
This paper reviews fundamental quantum measurement limitations, emphasizing how measurements inherently disturb the system, and explores their connection with complementarity and uncertainty principles.
Contribution
It provides a rigorous formulation of quantum measurement limitations and clarifies their relation to core quantum principles.
Findings
Quantum measurements necessarily disturb the system.
Measurement limitations are connected to complementarity.
Uncertainty principles underpin measurement restrictions.
Abstract
In this contribution I review rigorous formulations of a variety of limitations of measurability in quantum mechanics. To this end I begin with a brief presentation of the conceptual tools of modern measurement theory. I will make precise the notion that quantum measurements necessarily alter the system under investigation and elucidate its connection with the complementarity and uncertainty principles.
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Taxonomy
TopicsQuantum Mechanics and Applications · Quantum Information and Cryptography · Philosophy and History of Science