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Quantum Limits on Measurement and Control of a Mechanical Oscillator - Vivishek Sudhir

Quantum Limits on Measurement and Control of a Mechanical Oscillator

(Autor)

Buch | Hardcover
XIX, 214 Seiten
2017 | 1st ed. 2018
Springer International Publishing (Verlag)
978-3-319-69430-6 (ISBN)
CHF 149,75 inkl. MwSt
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This thesis reports on experiments in which the motion of a mechanical oscillator is measured with unprecedented precision. The position fluctuations of the oscillator-a glass nanostring-are measured with an imprecision that is sufficient to resolve its quantum zero-point motion within its thermal decoherence time. The concomitant observation of measurement back-action, in accordance with Heisenberg's uncertainty principle, verifies the principles of linear quantum measurements on a macroscopic mechanical object. The record of the measurement is used to perform feedback control so as to suppress both classical thermal motion and quantum measurement back-action.
These results verify some of the central and long-standing predictions of quantum measurement theory applied to a macroscopic object. The act of measurement not only perturbs the subject of the measurement-the mechanical oscillator-but also changes the state of the light used to make the measurement. This prediction is verified by demonstrating that the optical field, after having interacted with the mechanical oscillator, contains quantum correlations that render its quadrature fluctuations smaller than those of the vacuum - i.e., the light is squeezed.
Lastly, the thesis reports on some of the first feedback control experiments involving macroscopic objects in the quantum regime, together with an exploration of the quantum limit of feedback control. The book offers a pedagogical account of linear measurement theory, its realization via optical interferometry, and contains a detailed guide to precision optical interferometry..

Prologue.- Foundations.- Measurement-Based Control.- Quantum Correlations.- Epilogue.

Erscheinungsdatum
Reihe/Serie Springer Theses
Zusatzinfo XIX, 214 p. 46 illus., 43 illus. in color.
Verlagsort Cham
Sprache englisch
Maße 155 x 235 mm
Gewicht 520 g
Themenwelt Naturwissenschaften Physik / Astronomie Optik
Naturwissenschaften Physik / Astronomie Quantenphysik
Naturwissenschaften Physik / Astronomie Theoretische Physik
Schlagworte Cavity Optomechanics • Laser Interferometry • Precision measurements • Quantum Control • Quantum Correlations • quantum measurements • Squeezed Light • Standard Quantum Limit
ISBN-10 3-319-69430-8 / 3319694308
ISBN-13 978-3-319-69430-6 / 9783319694306
Zustand Neuware
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