Theory of noncontact friction for atom-surface interactions

Janke, M.; DeKieviet, Maarten

doi:10.1103/physreva.94.022510

Cited by 9 publications

(5 citation statements)

References 52 publications

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“…In particular, reliable fabrication methods are needed for the realization of scalable and efficient platforms. Furthermore, the interactions of the atoms with the cell walls [20,29,30,42,61] as well as their velocity distribution and diffusion behavior have to be investigated and understood.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Alkali-Metal Vapor Cells

et al. 2020

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Atom-light interactions in micro-and nanoscale systems hold great promise for alternative technologies based on integrated emitters and optical modes. We present the design architecture, construction method, and characterization of an all-glass alkali-metal vapor cell with nanometer-scale internal structure. Our cell has a glue-free design that allows versatile optical access, in particular with high numerical aperture optics, and incorporates a compact integrated heating system in the form of an external deposited indium tin oxide layer. By performing spectroscopy in different illumination and detection schemes, we investigate atomic densities and velocity distributions in various nanoscopic landscapes. We apply a two-photon excitation scheme to atoms confined in one dimension within our cells, achieving resonance line widths more than an order of magnitude smaller than the Doppler width. We also demonstrate sub-Doppler line widths for atoms confined in two dimensions to micron-sized channels. Furthermore, we illustrate control over vapor density within our cells through nanoscale confinement alone, which could offer a scalable route towards room-temperature devices with single atoms within an interaction volume. Our design offers a robust platform for miniaturized devices that could easily be combined with integrated photonic circuits.

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Section: Introductionmentioning

confidence: 99%

Nanostructured Alkali-Metal Vapor Cells

et al. 2020

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“…It is important to stress that Eq. ( 22) takes into account both the symmetric and the skew-symmetric parts of the Green tensor as well as the backaction from the electromagnetic field onto the atom's dynamics [15,69,70]. In particular, for a generic system that is translationally invariant along the x-axis, we can write the Hermitian tensor G (q, R a , ω) in terms of a real, symmetric matrix Σ(q, R a , ω) (even in q) and a real vector s ⊥ (q, R a , ω) (odd in q) normal to the invariance axis.…”

Section: Quantum and Thermal Viscositymentioning

confidence: 99%

Electromagnetic Viscosity in Complex Structured Environments: From black-body to Quantum Friction

Oelschläger¹,

Reiche²,

Egerland³

et al. 2021

Preprint

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“…Quantum effects are more important at low temperature, where thermal energy is smaller. Furthermore, dissipative forces arising from quantum effects [67] may be important at low temperatures [31].…”

Section: A6 Quantum Effectsmentioning

confidence: 99%

Evaluating the friction of rotary joints in molecular machines

Hogg

Moses

Allis

2017

Mol. Syst. Des. Eng.

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A computationally-efficient method for evaluating friction in molecular rotary bearings is presented. This method estimates drag from fluctuations in molecular dynamics simulations via the fluctuation-dissipation theorem. This is effective even for simulation times short compared to a bearing's energy damping time and for rotation speeds comparable to or below typical thermal values. We apply this method to two molecular rotary bearings of similar size at 300 K: previously studied nested (9,9)/(14,14) double-walled carbon nanotubes and a hypothetical rotary joint consisting of single acetylenic bonds in a rigid diamondoid housing. The acetylenic joint has a rotational frictional drag coefficient of 2 × 10 −35 kg m 2 /s. The friction for the nested nanotubes is 120 times larger, comparable to values reported by previous studies. This fluctuation-based method could evaluate dissipation in a variety of molecular systems with similarly rigid and symmetric bearings. arXiv:1701.08202v2 [cond-mat.soft] 7 Aug 2017 2 Related Work Several studies have used molecular dynamics (MD) simulations to investigate friction in nanomachines with sliding or rotating components.In [15], four different MD simulation configurations using the LAMMPS code and AIREBO force field were used to obtain consistent friction estimates for a rotating nested nanotube bearing. Other dissipation estimates for rotating nested nanotube bearings have been determined using intralayer interactions based on the Brenner potential [9] with interlayer interactions based on the Kolmogorov-Crespi registry-dependent potential [72], and with the COMPASS force field [32]. Dissipation estimates for linear sliding nested nanotube bearings have been determined using a custom force field and custom numerical simulator in [55,56], and a custom force field based on [53] and the r-RESPA integrator in [54].A MD model of experimentally realized graphene-on-graphene sliding is presented in [33]. The self-retracting motion of sheared graphene sheets is studied with an in-house MD integrator in [52]. Energy dissipation during high speed sliding of graphene sheets is investigated with GROMACS [28] and the DREIDING force field [42] in [37].

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Theory of noncontact friction for atom-surface interactions

Cited by 9 publications

References 52 publications

Nanostructured Alkali-Metal Vapor Cells

Nanostructured Alkali-Metal Vapor Cells

Electromagnetic Viscosity in Complex Structured Environments: From black-body to Quantum Friction

Evaluating the friction of rotary joints in molecular machines

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