Cold damping of levitated optically coupled nanoparticles

• URL: http://arxiv.org/abs/2305.11809v1
• Date: Fri, 19 May 2023 16:46:10 GMT
• Title: Cold damping of levitated optically coupled nanoparticles
• Authors: Vojtech Liska, Tereza Zemankova, Vojtech Svak, Petr Jakl, Jan Jezek, Martin Branecky, Stephen H. Simpson, Pavel Zemanek and Oto Brzobohaty
• Abstract summary: Methods for controlling the motion of single particles, optically levitated in vacuum, have developed rapidly in recent years. We show that the same method can be applied to a pair of nanoparticles, coupled by optical binding forces. We demonstrate cold damping of these normal modes, either independently or simultaneously, to sub-Kelvin temperatures at pressures of 5x10-3 mbar.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Methods for controlling the motion of single particles, optically levitated in vacuum, have developed rapidly in recent years. The technique of cold damping makes use of feedback-controlled, electrostatic forces to increase dissipation without introducing additional thermal fluctuations. This process has been instrumental in the ground-state cooling of individual electrically charged nanoparticles. Here we show that the same method can be applied to a pair of nanoparticles, coupled by optical binding forces. These optical binding forces are about three orders of magnitude stronger than typical Coulombic inter-particle force and result in a coupled motion of both nanoparticles characterized by a pair of normal modes. We demonstrate cold damping of these normal modes, either independently or simultaneously, to sub-Kelvin temperatures at pressures of 5x10^{-3} mbar. Experimental observations are captured by a theoretical model which we use to survey the parameter space more widely and to quantify the limits imposed by measurement noise and time delays. Our work paves the way for the study of quantum interactions between meso-scale particles and the exploration of multiparticle entanglement in levitated optomechanical systems.

Related papers

• Quantum thermodynamics with a single superconducting vortex [44.99833362998488]
  We demonstrate complete control over dynamics of a single superconducting vortex in a nanostructure. Our device allows us to trap the vortex in a field-cooled aluminum nanosquare and expel it on demand with a nanosecond pulse of electrical current.
  arXiv  Detail & Related papers  (2024-02-09T14:16:20Z)
• The strongly driven Fermi polaron [49.81410781350196]
  Quasiparticles are emergent excitations of matter that underlie much of our understanding of quantum many-body systems. We take advantage of the clean setting of homogeneous quantum gases and fast radio-frequency control to manipulate Fermi polarons. We measure the decay rate and the quasiparticle residue of the driven polaron from the Rabi oscillations between the two internal states.
  arXiv  Detail & Related papers  (2023-08-10T17:59:51Z)
• Interaction Between an Optically Levitated Nanoparticle and Its Thermal Image: Internal Thermometry via Displacement Sensing [0.0]
  displacement sensing of an optically levitated nanoparticles in front of a surface can be used to measure the induced dipole-dipole interaction. We argue that it is experimentally feasible to use displacement sensing of a levitated nanoparticles in front of a surface as an internal thermometer.
  arXiv  Detail & Related papers  (2022-09-23T15:19:50Z)
• Fast Quantum Interference of a Nanoparticle via Optical Potential Control [0.0]
  We introduce and theoretically analyze a scheme to prepare and detect non-Gaussian quantum states of an optically levitated particle. We show that this allows operating on short time- and lengthscales, which significantly reduces the demands on decoherence rates in such experiments.
  arXiv  Detail & Related papers  (2022-07-25T21:28:12Z)
• Driving Force and Nonequilibrium Vibronic Dynamics in Charge Separation of Strongly Bound Electron-Hole Pairs [59.94347858883343]
  We study the dynamics of charge separation in one, two and three-dimensional donor-acceptor networks. This allows us to identify the precise conditions in which underdamped vibrational motion induces efficient long-range charge separation.
  arXiv  Detail & Related papers  (2022-05-11T17:51:21Z)
• Scalable all-optical cold damping of levitated nanoparticles [3.0112534079486846]
  We introduce a novel all-optical cold damping scheme based on spatial modulation of the trap position. We show that the technique cools the center-of-mass motion of particles down to $17,$mK at a pressure of $2 times 10-6,$mbar. Our work paves the way towards studying quantum interactions between particles, achieving 3D quantum control of particle motion without cavity-based cooling, electrodes or charged particles.
  arXiv  Detail & Related papers  (2022-05-09T17:57:20Z)
• Sympathetic cooling and squeezing of two co-levitated nanoparticles [0.0]
  Levitated particles are an ideal tool for measuring weak forces and investigating quantum mechanics in macroscopic objects. This work establishes protocols to cool and manipulate arrays of nanoparticles for sensing and minimising the effect of optical heating in future experiments.
  arXiv  Detail & Related papers  (2021-11-04T19:44:45Z)
• Molecular Interactions Induced by a Static Electric Field in Quantum Mechanics and Quantum Electrodynamics [68.98428372162448]
  We study the interaction between two neutral atoms or molecules subject to a uniform static electric field. Our focus is to understand the interplay between leading contributions to field-induced electrostatics/polarization and dispersion interactions.
  arXiv  Detail & Related papers  (2021-03-30T14:45:30Z)
• Directional emission of down-converted photons from a dielectric nano-resonator [55.41644538483948]
  We theoretically describe the generation of photon pairs in the process of spontaneous parametric down-conversion. We reveal that highly directional photon-pair generation can be observed utilising the nonlinear Kerker-type effect.
  arXiv  Detail & Related papers  (2020-11-16T10:30:04Z)
• Enhanced decoherence for a neutral particle sliding on a metallic surface in vacuum [68.8204255655161]
  We show that non-contact friction enhances the decoherence of the moving atom. We suggest that measuring decoherence times through velocity dependence of coherences could indirectly demonstrate the existence of quantum friction.
  arXiv  Detail & Related papers  (2020-11-06T17:34:35Z)
• Stationary Gaussian Entanglement between Levitated Nanoparticles [0.0]
  Coherent scattering of photons is a novel mechanism of optomechanical coupling for optically levitated nanoparticles. We show that it allows efficient deterministic generation of Gaussian entanglement between two particles in separate tweezers.
  arXiv  Detail & Related papers  (2020-06-05T09:55:10Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.