Impact of molecular properties on diffraction at nanomasks with low charge density

• URL: http://arxiv.org/abs/2401.05854v1
• Date: Thu, 11 Jan 2024 11:56:23 GMT
• Title: Impact of molecular properties on diffraction at nanomasks with low charge density
• Authors: Ksenija Simonovi\'c, Richard Ferstl, Anders Barlow, Armin Shayeghi, Christian Brand, Markus Arndt
• Abstract summary: We show that ion-beam milling using neon facilitates the fabrication of lowly-charged nanomasks in gold-capped silicon nitride membranes. This allows us to observe the diffraction of polar molecules with a four times larger electric dipole moment than in previous experiments.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The quantum wave nature of matter is a cornerstone of modern physics, which has been demonstrated for a wide range of fundamental and composite particles. While diffraction at nanomechanical masks is usually regarded to be independent of atomic or molecular internal states, the particles' polarisabilities and dipole moments lead to dispersive interactions with the grating surface. In prior experiments, such forces largely prevented matter-wave experiments with polar molecules, as they led to dephasing of the matter wave in the presence of randomly distributed charges incorporated into the grating. Here we show that ion-beam milling using neon facilitates the fabrication of lowly-charged nanomasks in gold-capped silicon nitride membranes. This allows us to observe the diffraction of polar molecules with a four times larger electric dipole moment than in previous experiments. This new capability opens a path to the assessment of the structure of polar molecules in matter-wave diffraction experiments.

Related papers

• Single-molecule motion control [0.0]
  We present a toy model for controlling single-molecule diffusion by harnessing forces from elementary surface electrostatic charges within a lattice structure. We find that surface charge density critically influences diffusion, exhibiting linear scaling akin to Coulombic forces. The molecular trajectories predicted by our model bear resemblance to planetary motion, particularly in their gravity-assisted acceleration-like behaviour.
  arXiv  Detail & Related papers  (2023-09-26T16:05:49Z)
• 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)
• Efficient Reduction of Casimir Forces by Self-assembled Bio-molecular Thin Films [62.997667081978825]
  Casimir forces, related to London-van der Waals forces, arise if the spectrum of electromagnetic fluctuations is restricted by boundaries. We experimentally investigate the influence of self-assembled molecular bio and organic thin films on the Casimir force between a plate and a sphere. We find that molecular thin films, despite being a mere few nanometers thick, reduce the Casimir force by up to 14%.
  arXiv  Detail & Related papers  (2023-06-28T13:44:07Z)
• Optical Characterization of a Single Quantum Emitter Based on Vanadium Phthalocyanine Molecules [0.0]
  Vanadium-oxide phthalocyanine (VOPc) molecules stand out as promising candidates due to their large coherence times measured in ensemble. We show that single VOPc molecules with stable optical properties at room temperature can be isolated.
  arXiv  Detail & Related papers  (2022-09-20T16:37:18Z)
• Production of twisted particles in magnetic fields [62.997667081978825]
  Quantum states suitable for a production of charged particles in a uniform magnetic field are determined. Experiments allowing one successful discoveries of twisted positrons and positroniums are developed.
  arXiv  Detail & Related papers  (2022-07-28T14:20:36Z)
• Evaporation of microwave-shielded polar molecules to quantum degeneracy [1.8133492406483585]
  We demonstrate cooling of a three-dimensional gas of fermionic sodium-potassium molecules to well below the Fermi temperature using microwave shielding. The molecules are protected from reaching short range with a repulsive barrier engineered by coupling rotational states with a blue-detuned circularly polarized microwave. This large elastic-to-inelastic collision ratio allows us to cool the molecular gas down to 21 nanokelvin, corresponding to 0.36 times the Fermi temperature.
  arXiv  Detail & Related papers  (2022-01-13T18:53:27Z)
• Vortex beams of atoms and molecules [0.0]
  We present the first vortex beams of atoms and molecules, formed by diffracting supersonic beams of helium atoms and dimers. We observe a series of vortex rings corresponding to different OAM states in the accumulated images of particles impacting a detector. Our results may open new frontiers in atomic physics, utilizing the additional degree of freedom of OAM to probe collisions and alter fundamental interactions.
  arXiv  Detail & Related papers  (2021-04-29T19:11:04Z)
• 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)
• 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)
• Quantum coherent spin-electric control in a molecular nanomagnet at clock transitions [57.50861918173065]
  Electrical control of spins at the nanoscale offers architectural advantages in spintronics. Recent demonstrations of electric-field (E-field) sensitivities in molecular spin materials are tantalising. E-field sensitivities reported so far are rather weak, prompting the question of how to design molecules with stronger spin-electric couplings.
  arXiv  Detail & Related papers  (2020-05-03T09:27:31Z)
• Quantum Many-Body Physics with Ultracold Polar Molecules: Nanostructured Potential Barriers and Interactions [2.409938612878261]
  We design dipolar quantum many-body Hamiltonians that will facilitate the realization of exotic quantum phases. The main idea is to modulate both single-body potential barriers and two-body dipolar interactions on a spatial scale of tens of nanometers.
  arXiv  Detail & Related papers  (2020-01-31T12:30:12Z)

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.