Residual and Destroyed Accessible Information after Measurements

Han R, Leuchs G, Grassl M (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Physical Review Letters American Physical Society

Book Volume: 120

Article Number: 160501

Journal Issue: 16

DOI: 10.1103/PhysRevLett.120.160501

Abstract

When quantum states are used to send classical information, the receiver performs a measurement on the signal states. The amount of information extracted is often not optimal due to the receiver's measurement scheme and experimental apparatus. For quantum nondemolition measurements, there is potentially some residual information in the postmeasurement state, while part of the information has been extracted and the rest is destroyed. Here, we propose a framework to characterize a quantum measurement by how much information it extracts and destroys, and how much information it leaves in the residual postmeasurement state. The concept is illustrated for several receivers discriminating coherent states.

Authors with CRIS profile

Gerhard Leuchs

Involved external institutions

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE)

How to cite

APA:

Han, R., Leuchs, G., & Grassl, M. (2018). Residual and Destroyed Accessible Information after Measurements. Physical Review Letters, 120(16). https://doi.org/10.1103/PhysRevLett.120.160501

MLA:

Han, Rui, Gerd Leuchs, and Markus Grassl. "Residual and Destroyed Accessible Information after Measurements." Physical Review Letters 120.16 (2018).

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