Details
| Original language | English |
|---|---|
| Article number | 223602 |
| Journal | Physical review letters |
| Volume | 122 |
| Issue number | 22 |
| Early online date | 3 Jun 2019 |
| Publication status | Published - 7 Jun 2019 |
| Externally published | Yes |
Abstract
We use an optimal control protocol to cool one mode of the center-of-mass motion of an optically levitated nanoparticle. The feedback technique relies on exerting a Coulomb force on a charged particle with a pair of electrodes and follows the control law of a linear quadratic regulator, whose gains are optimized by a machine learning algorithm in under 5 s. With a simpler and more robust setup than optical feedback schemes, we achieve a minimum center-of-mass temperature of 5 mK at 3×10^{-7} mbar and transients 10-600 times faster than cold damping. This cooling technique can be easily extended to 3D cooling and is particularly relevant for studies demanding high repetition rates and force sensing experiments with levitated objects.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Physical review letters, Vol. 122, No. 22, 223602, 07.06.2019.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Optimal Feedback Cooling of a Charged Levitated Nanoparticle with Adaptive Control
AU - Conangla, Gerard P.
AU - Ricci, Francesco
AU - Cuairan, Marc T.
AU - Schell, Andreas W.
AU - Meyer, Nadine
AU - Quidant, Romain
N1 - Funding information: The authors acknowledge financial support from the European Research Council through Grant QnanoMECA (CoG—64790), Fundació Privada Cellex, CERCA Programme/Generalitat de Catalunya, and the Spanish Ministry of Economy and Competitiveness through the Severo Ochoa Programme for Centres of Excellence in R&D (SEV-2015-0522), Grant No. FIS2016-80293-R. G. P. C. thanks J. Martínez and S. López for their help with FPGA programming. The authors thank I. Alda for her help revising the text. G. P. C. conceived the idea, programmed the FPGA, and performed numerical calculations. F. R. developed the optical setup. G. P. C., M. T. C., and F. R. performed the measurements. G. P. C. and N. M. did analytical calculations. N. M., G. P. C., and F. R. processed the experimental data. A. W. S. contributed to the feedback idea. R. Q. supervised the project. G. P. C. and N. M. wrote the manuscript with input from all authors.
PY - 2019/6/7
Y1 - 2019/6/7
N2 - We use an optimal control protocol to cool one mode of the center-of-mass motion of an optically levitated nanoparticle. The feedback technique relies on exerting a Coulomb force on a charged particle with a pair of electrodes and follows the control law of a linear quadratic regulator, whose gains are optimized by a machine learning algorithm in under 5 s. With a simpler and more robust setup than optical feedback schemes, we achieve a minimum center-of-mass temperature of 5 mK at 3×10^{-7} mbar and transients 10-600 times faster than cold damping. This cooling technique can be easily extended to 3D cooling and is particularly relevant for studies demanding high repetition rates and force sensing experiments with levitated objects.
AB - We use an optimal control protocol to cool one mode of the center-of-mass motion of an optically levitated nanoparticle. The feedback technique relies on exerting a Coulomb force on a charged particle with a pair of electrodes and follows the control law of a linear quadratic regulator, whose gains are optimized by a machine learning algorithm in under 5 s. With a simpler and more robust setup than optical feedback schemes, we achieve a minimum center-of-mass temperature of 5 mK at 3×10^{-7} mbar and transients 10-600 times faster than cold damping. This cooling technique can be easily extended to 3D cooling and is particularly relevant for studies demanding high repetition rates and force sensing experiments with levitated objects.
UR - http://www.scopus.com/inward/record.url?scp=85066935099&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.122.223602
DO - 10.1103/PhysRevLett.122.223602
M3 - Article
C2 - 31283263
AN - SCOPUS:85066935099
VL - 122
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 22
M1 - 223602
ER -