English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Randomness is a valuable resource in science, cryptography, engineering, andinformation technology. Quantum-mechanical sources of randomness are attractivebecause of the indeterminism of individual quantum processes. Here we considerthe production of random bits from polarization measurements on photons. Wefirst present a pedagogical discussion of how the quantum randomness inherentin such measurements is connected to quantum coherence, and how it can bequantified in terms of the quantum state and an associated entropy value knownas min-entropy. We then explore these concepts by performing a series ofsingle-photon experiments that are suitable for the undergraduate laboratory.We prepare photons in different nonentangled and entangled states, and measurethese states tomographically. We use the information about the quantum state todetermine, in terms of the min-entropy, the minimum amount of randomnessproduced from a given photon state by different bit-generating measurements.This is helpful in assessing the presence of quantum randomness and in ensuringthe quality and security of the random-bit source.

Assessing randomness with the aid of quantum state measurement