Title Quantum Limits on Measurement and Control of a Mechanical Oscillator Author(s) Sudhir, Vivishek Publication Cham, Springer International Publishing, 2018. Description XIX, 214 p. 46 illus., 43 illus. in color : online resource Abstract Note 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.?? ISBN,Price 9783319694313 Keyword(s) 1. EBOOK 2. EBOOK - SPRINGER 3. QUANTUM COMPUTERS 4. Quantum Information Technology, Spintronics 5. QUANTUM OPTICS 6. QUANTUM PHYSICS 7. SPINTRONICS Item Type eBook Multi-Media Links Please Click here for eBook Circulation Data Accession#   Call# Status Issued To Return Due On Physical Location I09138     On Shelf