Journal
AVS QUANTUM SCIENCE
Volume 5, Issue 2, Pages -Publisher
AIP Publishing
DOI: 10.1116/5.0137579
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This article presents a method for measuring weak values using strong coherent states, eliminating the difficulties and slow rate associated with preparing single photons.
A common type of weak-value experiment prepares a single particle in one state, weakly measures the occupation number of another state, and post-selects on finding the particle in a third state (a click). Most weak-value experiments have been done with photons, but the heralded preparation of a single photon is difficult and slow of rate. Here, we show that the weak value mentioned above can be measured using strong (many-photon) coherent states, while still needing only a click detector such as an avalanche photodiode. One simply subtracts the no-click weak value from the click weak-value and scales the answer by a simple function of the click probability.
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