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arxiv: 2606.27478 · v1 · pith:UDRLIDDQnew · submitted 2026-06-25 · ❄️ cond-mat.mes-hall · physics.ins-det

Collection, characterization, and precision measurement of levitated charged nanoparticles

B. E. Kane , Joyce Coppock , Sunghyun Kim , Sarah Westgate This is my paper

Pith reviewed 2026-06-29 01:05 UTC · model grok-4.3

classification ❄️ cond-mat.mes-hall physics.ins-det
keywords levitated nanoparticlesion trapcharge-to-mass ratioprecision measurementhigh vacuumelectrospraythermostatic control
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The pith

Transferring nanoparticles to a separate high-vacuum analysis trap with thermostatic amplitude control enables Q/M measurements with precision approaching 10^{-5}.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper describes methods to generate charged nanoparticles by electrospray, collect them in an ion trap, characterize their thermal motion by imaging, and transfer them to a second trap. In the analysis trap at pressures around 10^{-8} Torr, thermostatic control stabilizes oscillation amplitudes for extended periods. This stability permits repeated frequency measurements from which the charge-to-mass ratio is extracted. The resulting precision reaches nearly one part in 10^5 and is presented as sufficient to begin surface-chemistry studies on micrometer-scale levitated objects.

Core claim

The authors establish that particle transfer to an isolated analysis trap at p ≃ 10^{-8} Torr, combined with active control of oscillation amplitude, permits long-term, low-noise frequency measurements from which Q/M can be deduced to a relative precision of approximately 10^{-5}.

What carries the argument

Two-trap architecture with transfer step: collection trap for electrospray loading and optical imaging, followed by transfer to analysis trap for high-vacuum thermostatic frequency metrology.

If this is right

  • Q/M precision near 10^{-5} is presented as adequate for surface-chemistry measurements on levitated micrometer particles.
  • Thermostatic amplitude control enables continuous frequency tracking over long intervals at 10^{-8} Torr.
  • Direct imaging of thermal motion in the collection trap provides rapid initial characterization before transfer.
  • The procedure separates particle generation from precision metrology to reduce noise.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • If charge remains stable after transfer, repeated measurements could track slow mass changes from adsorption or reaction.
  • The dual-trap isolation technique could be applied to other trapped-particle systems that need to decouple loading from measurement environments.
  • Frequency stability at this level might support tests of whether surface forces or charge patches affect levitation dynamics.

Load-bearing premise

Moving the particle between traps improves vacuum and noise performance without changing its charge, mass, or introducing new instabilities.

What would settle it

Record Q/M of the same particle immediately before and after transfer; any systematic shift larger than 10^{-5} would falsify the claim that transfer preserves particle properties.

Figures

Figures reproduced from arXiv: 2606.27478 by B. E. Kane, Joyce Coppock, Sarah Westgate, Sunghyun Kim.

Figure 1
Figure 1. Figure 1: FIG. 1. (a) COMSOL [PITH_FULL_IMAGE:figures/full_fig_p002_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: FIG. 2. (a) Particles are generated for collection in an ion trap by a Pt [PITH_FULL_IMAGE:figures/full_fig_p003_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: FIG. 3. Simple model of the acceleration and deceleration of a parti [PITH_FULL_IMAGE:figures/full_fig_p004_3.png] view at source ↗
Figure 5
Figure 5. Figure 5: FIG. 5. Mass and diameter of Au and calibrated polystyrene [PITH_FULL_IMAGE:figures/full_fig_p005_5.png] view at source ↗
Figure 6
Figure 6. Figure 6: FIG. 6. (a) The trap in which the particle is collected is attached to a [PITH_FULL_IMAGE:figures/full_fig_p006_6.png] view at source ↗
Figure 8
Figure 8. Figure 8: FIG. 8. Spectra of motion of a particle transferred to the analysis trap. [PITH_FULL_IMAGE:figures/full_fig_p007_8.png] view at source ↗
Figure 9
Figure 9. Figure 9: FIG. 9. Schematic diagram of the optics and electronics used to measure and control oscillatory motion of a trapped particle. A lens (located [PITH_FULL_IMAGE:figures/full_fig_p008_9.png] view at source ↗
Figure 11
Figure 11. Figure 11: FIG. 11. Photograph of the trap used for precision measurements of [PITH_FULL_IMAGE:figures/full_fig_p009_11.png] view at source ↗
Figure 10
Figure 10. Figure 10: FIG. 10. (a) Schematic depiction of the principle of parametric heat [PITH_FULL_IMAGE:figures/full_fig_p009_10.png] view at source ↗
Figure 12
Figure 12. Figure 12: c (inset)). This means that it is possible to take high precision data ranging from the ∼30 s response time indicated in Fig. 12a to long data sets encompassing hours of averaging taken over many days. For averaging times greater than ∼ 10 minutes, δ(Q/M)/⟨Q/M⟩ < 10−5 . Finally, to determine precisely the number of charges, n, on a particle by measuring the Q/M difference across m consec￾utive discharge (… view at source ↗
read the original abstract

We describe apparatus and experimental procedures for high stability precision measurements of levitated nanoscale particles confined in an ion trap in high vacuum. We discuss methods for particle generation and collection using electrospray emission, for rapid characterization by direct imaging of thermal motion, and for transfer of the particle from the trap where it is collected to a separate analysis trap in order to achieve better vacuum and lower noise. In the analysis trap at high vacuum (pressure $p\simeq10^{-8}$ Torr), we employ thermostatic control of the trapped particle oscillation amplitudes, allowing long-term, precision measurements of oscillation frequencies, from which the charge to mass ratio ($Q/M$) can be deduced. Under these conditions, we achieve $Q/M$ measurement precision approaching $10^{-5}$. This sensitivity will enable, for example, investigations of the surface chemistry of $\mu$m-scale levitated materials in ultra-high vacuum environments.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 0 minor

Summary. The manuscript describes apparatus and procedures for electrospray generation and collection of charged nanoparticles in an ion trap, rapid characterization via imaging of thermal motion, transfer to a separate analysis trap for improved vacuum (p ≃ 10^{-8} Torr), and long-term Q/M measurements via thermostatic control of oscillation amplitudes, claiming a resulting precision approaching 10^{-5}.

Significance. If the claimed precision is demonstrated with supporting data, the approach could enable new studies of surface chemistry on levitated μm-scale particles in UHV, extending capabilities in trapped nanoparticle experiments.

major comments (2)
  1. [Abstract] Abstract: The central claim of Q/M measurement precision approaching 10^{-5} is asserted without reference to any data, error bars, measurement statistics, frequency time series, or verification steps; this leaves the headline result unsupported by presented evidence.
  2. [Abstract / experimental procedures] Procedure description (transfer step): No pre- and post-transfer comparison of oscillation frequencies on the same particle is referenced to confirm that Q and M remain invariant during transfer from collection trap to analysis trap; any charge exchange or mechanical perturbation would directly undermine the target precision.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for their comments. We address each major point below and indicate planned revisions.

read point-by-point responses

  1. Referee: [Abstract] Abstract: The central claim of Q/M measurement precision approaching 10^{-5} is asserted without reference to any data, error bars, measurement statistics, frequency time series, or verification steps; this leaves the headline result unsupported by presented evidence.

    Authors: The body of the manuscript presents the supporting data, including frequency time series, error bars, and statistical analysis in Section 4 and Figure 5 that establish the reported precision. We will revise the abstract to include an explicit reference to this section and figure. revision: yes

  2. Referee: [Abstract / experimental procedures] Procedure description (transfer step): No pre- and post-transfer comparison of oscillation frequencies on the same particle is referenced to confirm that Q and M remain invariant during transfer from collection trap to analysis trap; any charge exchange or mechanical perturbation would directly undermine the target precision.

    Authors: We agree that explicit verification of Q/M invariance during transfer is important to support the target precision. The current manuscript does not include such pre- and post-transfer comparisons. We will add these data for multiple particles in the revised manuscript. revision: yes

Circularity Check

0 steps flagged

No circularity: experimental procedure paper with no derivations or fitted predictions

full rationale

The manuscript describes apparatus, particle generation via electrospray, imaging-based characterization, trap transfer for vacuum improvement, thermostatic amplitude control, and frequency measurements to deduce Q/M. No equations, ansatzes, uniqueness theorems, or parameter fits appear that could reduce a claimed result to its own inputs by construction. The 10^{-5} precision is presented as an achieved experimental outcome under stated conditions, not as a derived prediction. Self-citations (if any) are irrelevant because no load-bearing theoretical claim depends on them. This is a standard non-circular experimental methods paper.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

No mathematical model, free parameters, or new physical entities are introduced in the abstract; the work is purely experimental description.

pith-pipeline@v0.9.1-grok · 5691 in / 1116 out tokens · 30743 ms · 2026-06-29T01:05:18.498720+00:00 · methodology

discussion (0)

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Reference graph

Works this paper leans on

51 extracted references · 32 canonical work pages

  1. [1]

    Kane, B. E. , title =. 2010 , month =. doi:10.1103/PhysRevB.82.115441 , note =

    work page doi:10.1103/physrevb.82.115441 2010

  2. [2]

    and Kane,B

    Nagornykh,Pavel and Coppock,Joyce E. and Kane,B. E. , title =. 2015 , doi =

    2015

  3. [3]

    2017 , month =

    Optical and magnetic measurements of gyroscopically stabilized graphene nanoplatelets levitated in an ion trap , author =. 2017 , month =. doi:10.1103/PhysRevB.96.035402 , note =

    work page doi:10.1103/physrevb.96.035402 2017

  4. [4]

    Coppock and Pavel Nagornykh and Jacob P

    Joyce E. Coppock and Pavel Nagornykh and Jacob P. J. Murphy and I. S. McAdams and Saimouli Katragadda and B. E. Kane , journal =. Dual-trap system to study charged graphene nanoplatelets in high vacuum , volume =. 2017 , doi =

    2017

  5. [5]

    Optical Trapping and Optical Micromanipulation XV

    Optical Trapping and Optical Micromanipulation XV. Optical Trapping and Optical Micromanipulation XV

  6. [6]

    Coppock and I

    Joyce E. Coppock and I. S. McAdams and Jacob P. J. Murphy and Samuel Klueter and José Hannan and B. E. Kane , title =. Optical Trapping and Optical Micromanipulation XV, Proceedings of SPIE , editor =. 2018 , doi =

    2018

  7. [7]

    Kane , keywords =

    Joyce Coppock and Quinn Waxter and José Hannan and Samuel Klueter and B.E. Kane , keywords =. High temperature measurements of levitated gold nanospheres derived from gold suspensions , journal =. 2021 , issn =. doi:10.1016/j.jqsrt.2021.107645 , note =

    work page doi:10.1016/j.jqsrt.2021.107645 2021

  8. [8]

    , year =

    Coppock, Joyce and Waxter, Quinn and Wolle, Robert and Kane, B.E. , year =. Observation of undercooling in a levitated nanoscale liquid. doi:10.1021/acs.jpcc.2c04014 , note =

    work page doi:10.1021/acs.jpcc.2c04014

  9. [9]

    Theoretical temperature-dependence surface tension of pure liquid gold

    Fathi Aqra and Ahmed Ayyad. Theoretical temperature-dependence surface tension of pure liquid gold. Materials Letters. 2011. doi:10.1016/j.matlet.2011.04.063

    work page doi:10.1016/j.matlet.2011.04.063 2011

  10. [10]

    and Howder, Collin R

    Bell, David M. and Howder, Collin R. and Johnson, Ryan C. and Anderson, Scott L. , title =. 2014 , doi =

    2014

  11. [11]

    Physical Review B63(3) (2001)https://doi.org/10.1103/PhysRevB.63.033402

    Buks, E. and Roukes, M. L. , journal =. Stiction, adhesion energy, and the. 2001 , month =. doi:10.1103/PhysRevB.63.033402 , note =

    work page doi:10.1103/physrevb.63.033402 2001

  12. [12]

    and Knoll, Matthias and Mestres, Pau and Northup, Tracy E

    Dania, Lorenzo and Bykov, Dmitry S. and Knoll, Matthias and Mestres, Pau and Northup, Tracy E. , journal =. Optical and electrical feedback cooling of a silica nanoparticle levitated in a. 2021 , month =. doi:10.1103/PhysRevResearch.3.013018 , note =

    work page doi:10.1103/physrevresearch.3.013018 2021

  13. [13]

    2024 , month =

    Ultrahigh quality factor of a levitated nanomechanical oscillator , author =. 2024 , month =. doi:10.1103/PhysRevLett.132.133602 , note =

    work page doi:10.1103/physrevlett.132.133602 2024

  14. [15]

    Soft-landing and optical characterization of a preselected single fluorescent particle on a tapered optical fiber , volume =

    Markus Gregor and Alexander Kuhlicke and Oliver Benson , journal =. Soft-landing and optical characterization of a preselected single fluorescent particle on a tapered optical fiber , volume =. 2009 , doi =

    2009

  15. [16]

    and Campbell, Charles T

    Hemmingson, Stephanie L. and Campbell, Charles T. , title =. 2017 , doi =

    2017

  16. [18]

    Ion optics with electrostatic lenses

    Hinterberger, F. Ion optics with electrostatic lenses. CAS - CERN Accelerator School: Small Accelerators, Zeegse, The Netherlands 24 May - 2 Jun 2005. 2006. doi:10.5170/CERN-2006-012

    work page doi:10.5170/cern-2006-012 2005

  17. [19]

    and Abel, Bernd and Asmis, Knut R

    Hoffmann, Benjamin and Esser, Tim K. and Abel, Bernd and Asmis, Knut R. , title =. 2020 , doi =

    2020

  18. [20]

    Asmis , title =

    Benjamin Hoffmann and Sophia Leippe and Knut R. Asmis , title =. 2024 , publisher =. doi:10.1080/00268976.2023.2210454 , note =

    work page doi:10.1080/00268976.2023.2210454 2024

  19. [21]

    and Long, Bryan A

    Howder, Collin R. and Long, Bryan A. and Gerlich, Dieter and Alley, Rex N. and Anderson, Scott L. , title =. 2015 , doi =

    2015

  20. [22]

    and Poschinger, Ulrich G

    Jacob, Georg and Groot-Berning, Karin and Wolf, Sebastian and Ulm, Stefan and Couturier, Luc and Dawkins, Samuel T. and Poschinger, Ulrich G. and Schmidt-Kaler, Ferdinand and Singer, Kilian , year =. Transmission microscopy with nanometer resolution using a deterministic single ion source , volume =. doi:10.1103/PhysRevLett.117.043001 , note =

    work page doi:10.1103/physrevlett.117.043001

  21. [24]

    and Robson, Simon G

    Jakob, Alexander M. and Robson, Simon G. and Schmitt, Vivien and Mourik, Vincent and Posselt, Matthias and Spemann, Daniel and Johnson, Brett C. and Firgau, Hannes R. and Mayes, Edwin and McCallum, Jeffrey C. and Morello, Andrea and Jamieson, David N. , year =. Deterministic shallow dopant implantation in silicon with detection confidence upper-bound to 9...

    work page doi:10.1002/adma.202103235

  22. [25]

    2015 , doi =

    Kuhlicke, Alexander and Rylke, Antonio and Benson, Oliver , title =. 2015 , doi =

    2015

  23. [26]

    and Rodriguez, Daniel J

    Lau, Chris Y. and Rodriguez, Daniel J. and Friese, Abigail M. and Anderson, Scott L. , title = ". 2023 , month =. doi:10.1063/5.0143948 , note =

    work page doi:10.1063/5.0143948 2023

  24. [27]

    , year =

    Reiser, Alain and Schuh, Christopher A. , year =. Microparticle impact testing at high precision, higher temperatures, and with lithographically patterned projectiles , volume =. doi:10.1002/sia.3592 , note =

    work page doi:10.1002/sia.3592

  25. [28]

    and Schell, Andreas W

    Ricci, Francesco and Cuairan, Marc T. and Schell, Andreas W. and Hebestreit, Erik and Rica, Raúl A. and Meyer, Nadine and Quidant, Romain , title =. 2022 , doi =

    2022

  26. [29]

    and Lau, Chris Y

    Long, Bryan A. and Lau, Chris Y. and Rodriguez, Daniel J. and Tang, Susanna An and Anderson, Scott L. , title =. Journal of the American Chemical Society , volume =. 2020 , doi =

    2020

  27. [30]

    Rodriguez and Chris Y

    Daniel J. Rodriguez and Chris Y. Lau and Bryan A. Long and Susanna An Tang and Abigail M. Friese and Scott L. Anderson , keywords =. O2-oxidation of individual graphite and graphene nanoparticles in the 1200–2200 K range: Particle-to-particle variations and the evolution of the reaction rates and optical properties , journal =. 2021 , issn =. doi:https://...

    work page doi:10.1016/j.carbon.2020.10.053 2021

  28. [31]

    Ultranarrow-linewidth levitated nano-oscillator for testing dissipative wave-function collapse , author =. Phys. Rev. Res. , volume =. 2020 , month =. doi:10.1103/PhysRevResearch.2.023349 , url =

    work page doi:10.1103/physrevresearch.2.023349 2020

  29. [32]

    and Lau, Chris Y

    Rodriguez, Daniel J. and Lau, Chris Y. and Friese, Abigail M. and Long, Bryan A. and Anderson, Scott L. , title =. 2022 , doi =

    2022

  30. [33]

    and Spiecker, H

    Schönhense, G. and Spiecker, H. , title = ". 2002 , month =. doi:10.1116/1.1523373 , note =

    work page doi:10.1116/1.1523373 2002

  31. [34]

    Focusing a deterministic single-ion beam , volume =

    Schnitzler, Wolfgang and Jacob, Georg and Fickler, Robert and Schmidt-Kaler, Ferdinand and Singer, Kilian , year =. Focusing a deterministic single-ion beam , volume =. doi:10.1088/1367-2630/12/6/065023 , note =

    work page doi:10.1088/1367-2630/12/6/065023

  32. [35]

    and Munuera-Javaloy, C

    Tobalina, A. and Munuera-Javaloy, C. and Torrontegui, E. and Muga, J.G. and Casanova, J. , year =. Tailored ion beam for precise colour centre creation , volume =. doi:10.1098/rsta.2021.0271 , note =

    work page doi:10.1098/rsta.2021.0271 2021

  33. [36]

    Physical Review E , volume =

    Li, Zhigang and Wang, Hai , title =. Physical Review E , volume =. 2003 , month =. doi:10.1103/PhysRevE.68.061206 , url =

    work page doi:10.1103/physreve.68.061206 2003

  34. [37]

    and Kane, B

    Coppock, Joyce E. and Kane, B. E. , title =. Applied Physics Letters , volume =. 2024 , month =. doi:10.1063/5.0240802 , url =

    work page doi:10.1063/5.0240802 2024

  35. [38]

    Nisbet-Jones, P. B. R. and King, S. A. and Jones, J. M. and Godun, R. M. and Baynham, C. F. A. and Bongs, K. and Dole. A single-ion trap with minimized ion--environment interactions , journal =. 2016 , volume =. doi:10.1007/s00340-016-6327-x , url =

    work page doi:10.1007/s00340-016-6327-x 2016

  36. [39]

    and Hanhijärvi, K

    Lindvall, T. and Hanhijärvi, K. J. and Fordell, T. and Wallin, A. E. , title =. Journal of Applied Physics , volume =. 2022 , month =. doi:10.1063/5.0106633 , url =

    work page doi:10.1063/5.0106633 2022

  37. [40]

    Gonzalez-Ballestero and M

    C. Gonzalez-Ballestero and M. Aspelmeyer and L. Novotny and R. Quidant and O. Romero-Isart , title =. Science , volume =. 2021 , doi =. https://www.science.org/doi/pdf/10.1126/science.abg3027 , abstract =

    work page doi:10.1126/science.abg3027 2021

  38. [41]

    Nano Letters , volume =

    Ju, Peng and Jin, Yuanbin and Shen, Kunhong and Duan, Yao and Xu, Zhujing and Gao, Xingyu and Ni, Xingjie and Li, Tongcang , title =. Nano Letters , volume =. 2023 , doi =

    2023

  39. [42]

    Fluid Flow Through Small Calibrated Orifices , institution =. n.d. , url =

  40. [43]

    2013 , note =

    Electrospray Operation Using Nitrogen in Place of Air , institution =. 2013 , note =

    2013

  41. [44]

    Allen and O.G

    M.D. Allen and O.G. Raabe , abstract =. Re-evaluation of millikan's oil drop data for the motion of small particles in air , journal =. 1982 , issn =. doi:https://doi.org/10.1016/0021-8502(82)90019-2 , url =

    work page doi:10.1016/0021-8502(82)90019-2 1982

  42. [45]

    and Mestres, Pau and Dania, Lorenzo and Schmöger, Lisa and Northup, Tracy E

    Bykov, Dmitry S. and Mestres, Pau and Dania, Lorenzo and Schmöger, Lisa and Northup, Tracy E. , title =. Applied Physics Letters , volume =. 2019 , month =. doi:10.1063/1.5109645 , url =

    work page doi:10.1063/1.5109645 2019

  43. [46]

    Applied Physics Letters , volume =

    Mestres, Pau and Berthelot, Johann and Spasenović, Marko and Gieseler, Jan and Novotny, Lukas and Quidant, Romain , title =. Applied Physics Letters , volume =. 2015 , month =. doi:10.1063/1.4933180 , url =

    work page doi:10.1063/1.4933180 2015

  44. [47]

    and Kato, K

    Minowa, Y. and Kato, K. and Ueno, S. and Penny, T. W. and Pontin, A. and Ashida, M. and Barker, P. F. , title =. Review of Scientific Instruments , volume =. 2022 , month =. doi:10.1063/5.0095614 , url =

    work page doi:10.1063/5.0095614 2022

  45. [48]

    Applied Physics Letters , volume =

    Das, Apurba and Schaetz, Tobias and Warring, Ulrich , title =. Applied Physics Letters , volume =. 2025 , month =. doi:10.1063/5.0268227 , url =

    work page doi:10.1063/5.0268227 2025

  46. [49]

    Friese and Audrey R

    Abigail M. Friese and Audrey R. Burrows and Scott L. Anderson , abstract =. High and ultra-high temperature reaction kinetics by single nanoparticle mass spectrometry , journal =. 2025 , issn =. doi:https://doi.org/10.1016/j.ijms.2025.117435 , url =

    work page doi:10.1016/j.ijms.2025.117435 2025

  47. [50]

    and Papagrigoriou, Kleopatra and Behrendt, Carl and Bastian, Björn

    Leippe, Sophia C. and Papagrigoriou, Kleopatra and Behrendt, Carl and Bastian, Björn. Controlling the charge of single nanoparticles in an ion trap. Phys. Chem. Chem. Phys. 2026. doi:10.1039/D5CP04304B

    work page doi:10.1039/d5cp04304b 2026

  48. [51]

    and Hoffmann, Benjamin and Anderson, Scott L

    Esser, Tim K. and Hoffmann, Benjamin and Anderson, Scott L. and Asmis, Knut R. , title =. Review of Scientific Instruments , volume =. 2019 , month =. doi:10.1063/1.5128203 , url =

    work page doi:10.1063/1.5128203 2019

  49. [52]

    and Johst, Florian and Hoffmann, Benjamin and Krohn, Sonja and Papagrigoriou, Kleopatra and Asmis, Knut R

    Leippe, Sophia C. and Johst, Florian and Hoffmann, Benjamin and Krohn, Sonja and Papagrigoriou, Kleopatra and Asmis, Knut R. and Mews, Alf and Bastian, Bj. Probing the Temperature of Single Quantum Dots Confined in a Nanoparticle Ion Trap by Fluorescence Thermometry , journal =. 2024 , doi =

    2024

  50. [53]

    2013 , school=

    Sensitive, 3D micromotion compensation in a surface-electrode ion trap , author=. 2013 , school=

    2013

  51. [54]

    2021 , eprint=

    Micromotion minimisation by synchronous detection of parametrically excited motion , author=. 2021 , eprint=

    2021