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|Author(s):||John J. Bollinger; Wayne M. Itano; David J. Wineland; D J. Heinzen;|
|Title:||Optimal Frequency Measurements with Maximally Correlated States|
|Published:||December 01, 1996|
|Abstract:||We show how maximally correlated states of N two-level particles can be used in spectroscopy to yield a frequency uncertainty equal to (NT)-1, where T is the time of a single measurement. From the time-energy uncertainty relation we show that this is the best precision possible. We rephrase these results in the language of particle interferometry and obtain a state and detection operator which can be used to achieve a phase uncertainty exactly equal to the 1/N Heisenberg limit, where N is the number of particles used in the measurement.|
|Citation:||Physical Review Letters|
|Pages:||pp. 4649 - 4652|
|PDF version:||Click here to retrieve PDF version of paper (114KB)|