Alarcón Robledo, Carlos Luis (2021) Exploring short time-scales of a levitated nanosphere. Master's Thesis / Essay, Physics.
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Abstract
Levitated nanospheres have been used in the last decades as ideal thermodynamics and force sensors. Within these interests lies the study of the acceleration to equilibrium of a brownian particle from one state to another on unprecedented short time-scales. This project sets the foundations to pursue the first experimental implementation to date of a shortcut on the relaxation to equilibrium of a levitated particle. For that matter, we measured the natural relaxation time of the system and tracked the motion of the particle at longer and shorter time-scales, measuring ballistic brownian motion. We furthermore observed signs of relaxation towards equilibrium by compression and expansion of the optical potential stiffness. Shortcuts can improve the efficiency of heat engines, specially using levitated particles due to the high control of their effective temperature. In addition the underdamped regime still lacks of experimental results. Likewise, shortcuts have direct applications in sensing experiments causing transitory cancellation of resonance signals. Furthermore, we studied the capability of external modulations to control the dynamics of the trapped particle. Their implementation serve different purposes such as exploring non-linearities of the optical potential well, seeking sensitive force sensing schemes or designing bistability amplitude regions. The stability of these systems can be studied behind the general framework of dynamical systems and chaos.
| Item Type: | Thesis (Master's Thesis / Essay) |
|---|---|
| Supervisor name: | Hoekstra, S. and Sterk, A.E. |
| Degree programme: | Physics |
| Thesis type: | Master's Thesis / Essay |
| Language: | English |
| Date Deposited: | 08 Oct 2021 09:14 |
| Last Modified: | 08 Oct 2021 09:14 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/26175 |
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