Fundamental Tests of Physics with Optically Trapped Microspheres:
Gespeichert in:
| Format: | Elektronisch E-Book |
|---|---|
| Sprache: | English |
| Veröffentlicht: |
New York, NY
Springer New York
2013
|
| Schriftenreihe: | Springer Theses, Recognizing Outstanding Ph.D. Research
|
| Schlagworte: | |
| Online-Zugang: | TUM01 UBT01 Volltext Inhaltsverzeichnis Abstract |
| Beschreibung: | Introduction -- Physical Principle of Optical Tweezers -- Optical Trapping of Glass Microspheres in Air and Vacuum -- Measuring the Instantaneous Velocity of a Brownian Particle in Air -- Towards Measurement of the Instantaneous Velocity of a Brownian Particle in Water -- Millikelvin Cooling of an Optically Trapped Microsphere in Vacuum -- Towards Quantum Ground-State Cooling -- Appendix. Fundamental Tests of Physics with Optically Trapped Microspheres details experiments on studying the Brownian motion of an optically trapped microsphere with ultrahigh resolution and the cooling of its motion towards the quantum ground state. Glass microspheres were trapped in water, air, and vacuum with optical tweezers; and a detection system that can monitor the position of a trapped microsphere with Angstrom spatial resolution and microsecond temporal resolution was developed to study the Brownian motion of a trapped microsphere in air over a wide range of pressures. The instantaneous velocity of a Brownian particle, in particular, was measured for the very first time, and the results provide direct verification of the Maxwell-Boltzmann velocity distribution and the energy equipartition theorem for a Brownian particle. For short time scales, the ballistic regime of Brownian motion is observed, in contrast to the usual diffusive regime. In vacuum, active feedback is used to cool the center-of-mass motion of an optically trapped microsphere from room temperature to a minimum temperature of about 1.5 mK. This is an important step toward studying the quantum behaviors of a macroscopic particle trapped in vacuum |
| Beschreibung: | 1 Online-Ressource |
| ISBN: | 9781461460312 |
| DOI: | 10.1007/978-1-4614-6031-2 |
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| 500 | |a Fundamental Tests of Physics with Optically Trapped Microspheres details experiments on studying the Brownian motion of an optically trapped microsphere with ultrahigh resolution and the cooling of its motion towards the quantum ground state. Glass microspheres were trapped in water, air, and vacuum with optical tweezers; and a detection system that can monitor the position of a trapped microsphere with Angstrom spatial resolution and microsecond temporal resolution was developed to study the Brownian motion of a trapped microsphere in air over a wide range of pressures. The instantaneous velocity of a Brownian particle, in particular, was measured for the very first time, and the results provide direct verification of the Maxwell-Boltzmann velocity distribution and the energy equipartition theorem for a Brownian particle. For short time scales, the ballistic regime of Brownian motion is observed, in contrast to the usual diffusive regime. In vacuum, active feedback is used to cool the center-of-mass motion of an optically trapped microsphere from room temperature to a minimum temperature of about 1.5 mK. This is an important step toward studying the quantum behaviors of a macroscopic particle trapped in vacuum | ||
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Datensatz im Suchindex
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| adam_text | FUNDAMENTAL TESTS OF PHYSICS WITH OPTICALLY TRAPPED MICROSPHERES
/ LI, TONGCANG
: 2013
TABLE OF CONTENTS / INHALTSVERZEICHNIS
INTRODUCTION
PHYSICAL PRINCIPLE OF OPTICAL TWEEZERS
OPTICAL TRAPPING OF GLASS MICROSPHERES IN AIR AND VACUUM
MEASURING THE INSTANTANEOUS VELOCITY OF A BROWNIAN PARTICLE IN AIR
TOWARDS MEASUREMENT OF THE INSTANTANEOUS VELOCITY OF A BROWNIAN PARTICLE
IN WATER
MILLIKELVIN COOLING OF AN OPTICALLY TRAPPED MICROSPHERE IN VACUUM
TOWARDS QUANTUM GROUND-STATE COOLING
APPENDIX
DIESES SCHRIFTSTUECK WURDE MASCHINELL ERZEUGT.
FUNDAMENTAL TESTS OF PHYSICS WITH OPTICALLY TRAPPED MICROSPHERES
/ LI, TONGCANG
: 2013
ABSTRACT / INHALTSTEXT
FUNDAMENTAL TESTS OF PHYSICS WITH OPTICALLY TRAPPED MICROSPHERES DETAILS
EXPERIMENTS ON STUDYING THE BROWNIAN MOTION OF AN OPTICALLY TRAPPED
MICROSPHERE WITH ULTRAHIGH RESOLUTION AND THE COOLING OF ITS MOTION
TOWARDS THE QUANTUM GROUND STATE. GLASS MICROSPHERES WERE TRAPPED IN
WATER, AIR, AND VACUUM WITH OPTICAL TWEEZERS; AND A DETECTION SYSTEM
THAT CAN MONITOR THE POSITION OF A TRAPPED MICROSPHERE WITH ANGSTROM
SPATIAL RESOLUTION AND MICROSECOND TEMPORAL RESOLUTION WAS DEVELOPED TO
STUDY THE BROWNIAN MOTION OF A TRAPPED MICROSPHERE IN AIR OVER A WIDE
RANGE OF PRESSURES. THE INSTANTANEOUS VELOCITY OF A BROWNIAN PARTICLE,
IN PARTICULAR, WAS MEASURED FOR THE VERY FIRST TIME, AND THE RESULTS
PROVIDE DIRECT VERIFICATION OF THE MAXWELL-BOLTZMANN VELOCITY
DISTRIBUTION AND THE ENERGY EQUIPARTITION THEOREM FOR A BROWNIAN
PARTICLE. FOR SHORT TIME SCALES, THE BALLISTIC REGIME OF BROWNIAN MOTION
IS OBSERVED, IN CONTRAST TO THE USUAL DIFFUSIVE REGIME. IN VACUUM,
ACTIVE FEEDBACK IS USED TO COOL THE CENTER-OF-MASS MOTION OF AN
OPTICALLY TRAPPED MICROSPHERE FROM ROOM TEMPERATURE TO A MINIMUM
TEMPERATURE OF ABOUT 1.5 MK. THIS IS AN IMPORTANT STEP TOWARD STUDYING
THE QUANTUM BEHAVIORS OF A MACROSCOPIC PARTICLE TRAPPED IN VACUUM
DIESES SCHRIFTSTUECK WURDE MASCHINELL ERZEUGT.
|
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| spelling | Fundamental Tests of Physics with Optically Trapped Microspheres by Tongcang Li New York, NY Springer New York 2013 1 Online-Ressource txt rdacontent c rdamedia cr rdacarrier Springer Theses, Recognizing Outstanding Ph.D. Research Introduction -- Physical Principle of Optical Tweezers -- Optical Trapping of Glass Microspheres in Air and Vacuum -- Measuring the Instantaneous Velocity of a Brownian Particle in Air -- Towards Measurement of the Instantaneous Velocity of a Brownian Particle in Water -- Millikelvin Cooling of an Optically Trapped Microsphere in Vacuum -- Towards Quantum Ground-State Cooling -- Appendix. Fundamental Tests of Physics with Optically Trapped Microspheres details experiments on studying the Brownian motion of an optically trapped microsphere with ultrahigh resolution and the cooling of its motion towards the quantum ground state. Glass microspheres were trapped in water, air, and vacuum with optical tweezers; and a detection system that can monitor the position of a trapped microsphere with Angstrom spatial resolution and microsecond temporal resolution was developed to study the Brownian motion of a trapped microsphere in air over a wide range of pressures. The instantaneous velocity of a Brownian particle, in particular, was measured for the very first time, and the results provide direct verification of the Maxwell-Boltzmann velocity distribution and the energy equipartition theorem for a Brownian particle. For short time scales, the ballistic regime of Brownian motion is observed, in contrast to the usual diffusive regime. In vacuum, active feedback is used to cool the center-of-mass motion of an optically trapped microsphere from room temperature to a minimum temperature of about 1.5 mK. This is an important step toward studying the quantum behaviors of a macroscopic particle trapped in vacuum Quantentheorie Physics Quantum theory Thermodynamics Quantum Physics Nanoscale Science and Technology Low Temperature Physics Statistical Physics, Dynamical Systems and Complexity Li, Tongcang Sonstige oth https://doi.org/10.1007/978-1-4614-6031-2 Verlag Volltext Springer Fremddatenuebernahme application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=025730932&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis Springer Fremddatenuebernahme application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=025730932&sequence=000003&line_number=0002&func_code=DB_RECORDS&service_type=MEDIA Abstract |
| spellingShingle | Fundamental Tests of Physics with Optically Trapped Microspheres Quantentheorie Physics Quantum theory Thermodynamics Quantum Physics Nanoscale Science and Technology Low Temperature Physics Statistical Physics, Dynamical Systems and Complexity |
| title | Fundamental Tests of Physics with Optically Trapped Microspheres |
| title_auth | Fundamental Tests of Physics with Optically Trapped Microspheres |
| title_exact_search | Fundamental Tests of Physics with Optically Trapped Microspheres |
| title_full | Fundamental Tests of Physics with Optically Trapped Microspheres by Tongcang Li |
| title_fullStr | Fundamental Tests of Physics with Optically Trapped Microspheres by Tongcang Li |
| title_full_unstemmed | Fundamental Tests of Physics with Optically Trapped Microspheres by Tongcang Li |
| title_short | Fundamental Tests of Physics with Optically Trapped Microspheres |
| title_sort | fundamental tests of physics with optically trapped microspheres |
| topic | Quantentheorie Physics Quantum theory Thermodynamics Quantum Physics Nanoscale Science and Technology Low Temperature Physics Statistical Physics, Dynamical Systems and Complexity |
| topic_facet | Quantentheorie Physics Quantum theory Thermodynamics Quantum Physics Nanoscale Science and Technology Low Temperature Physics Statistical Physics, Dynamical Systems and Complexity |
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