Abstract
A simple experimental arrangement demonstrates back-action evasion of noise in a quantum measurement of an optical field. Correlation between the photocurrents from a measured signal beam and a measurement readout beam is 0.6 dB below the shot-noise limit. The measurement is accomplished by use of a single-pass parametric down-conversion process.
| Original language | English |
|---|---|
| Pages (from-to) | 28-31 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 62 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1989 |
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