Strong Confinement of a Nanoparticle in a Needle Paul Trap: Towards Matter-Wave Interferometry with Nanodiamonds

• URL: http://arxiv.org/abs/2508.14272v1
• Date: Tue, 19 Aug 2025 21:02:57 GMT
• Title: Strong Confinement of a Nanoparticle in a Needle Paul Trap: Towards Matter-Wave Interferometry with Nanodiamonds
• Abstract summary: A matter-wave interferometer with a massive particle, can test numerous fundamental ideas.<n>We design a needle Paul trap with a controllable distance between the electrodes, giving rise to a strong electric gradient.<n>By combining it with an effective charging method - electrospray - we reach a trap frequency of up to 40 kHz.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Quantum mechanics (QM) and General relativity (GR), also known as the theory of gravity, are the two pillars of modern physics. A matter-wave interferometer with a massive particle, can test numerous fundamental ideas, including the spatial superposition principle - a foundational concept in QM - in completely new regimes, as well as the interface between QM and GR, e.g., testing the quantization of gravity. Consequently, there exists an intensive effort to realize such an interferometer. While several paths are being pursued, we focus on utilizing nanodiamonds as our particle, and a spin embedded in the nanodiamond together with Stern-Gerlach forces, to achieve a closed loop in space-time. There is a growing community of groups pursuing this path [1]. We are posting this technical note (as part of a series of seven such notes), to highlight our plans and solutions concerning various challenges in this ambitious endeavor, hoping this will support this growing community. In this work, we achieve strong confinement of a levitated particle, which is crucial for angular confinement, precise positioning, and perhaps also advantageous for deep cooling. We designed a needle Paul trap with a controllable distance between the electrodes, giving rise to a strong electric gradient. By combining it with an effective charging method - electrospray - we reach a trap frequency of up to 40 kHz, which is more than twice the state of the art. We believe that the designed trap could become a significant tool in the hands of the community working towards massive matter-wave interferometry. We would be happy to make more details available upon request.

Related papers

• Conceptual and Geometric Foundations for a Teleparallel Approach to Quantum Gravity [45.88028371034407]
  We revisit quantum field theory in curved spacetime as a semi-classical framework for quantum matter on classical geometries.<n>We outline a teleparallel framework based on coframe and spin-connection variables, where gravity is encoded in torsion rather than string curvature.
  arXiv  Detail & Related papers  (2026-06-08T15:02:26Z)
• Neutralization of Levitated Charged Nanodiamond: Towards matter-wave interferometry with massive objects [0.0]
  We demonstrate the neutralization of levitated nanodiamonds using ultraviolet photoemission.<n>We demonstrate discrete, single-electron charge manipulation of levitated nanodiamond in a needle Paul trap at a pressure of 0.5,Torr.<n>This constitutes a significant step towards the realization of a nanodiamond spatial interferometer.
  arXiv  Detail & Related papers  (2025-08-21T14:50:58Z)
• Quantum control of Nitrogen-Vacancy spin in Diamonds: Towards matter-wave interferometry with massive objects [0.0]
  A matter-wave interferometer with a massive particle can test numerous fundamental ideas, including the spatial superposition principle.<n>We present our work on quantum control of a nitrogen-vacancy spin system in bulk diamonds and in levitated diamonds.
  arXiv  Detail & Related papers  (2025-08-21T12:31:11Z)
• Design of high-efficiency UHV loading of nanodiamonds into a Paul trap: Towards Matter-Wave Interferometry with Massive Objects [0.0]
  A matter-wave interferometer with a massive particle can test numerous fundamental ideas.<n>We focus on utilizing nanodiamonds as our particle, and a spin embedded in the ND together with Stern-Gerlach forces, to achieve a closed loop in space-time.
  arXiv  Detail & Related papers  (2025-08-20T14:01:50Z)
• Trapping and cooling of nanodiamonds in a Paul trap under ultra-high vacuum: Towards matter-wave interferometry with massive objects [0.0]
  A matter-wave interferometer with a massive particle can test numerous fundamental ideas, including the spatial superposition principle.<n>We focus on utilizing nanodiamonds with embedded spins as test particles.<n>In this work we detail the trapping of a nanodiamond at 10-8 mbar, which is good enough for the realization of a short-duration Stern-Gerlach interferometer.
  arXiv  Detail & Related papers  (2025-08-20T13:05:23Z)
• Parametric feedback cooling of librations of a nanodiamond in a Paul trap: Towards matter-wave interferometry with massive objects [0.0]
  A matter-wave interferometer with a massive particle can test numerous fundamental ideas.<n>We present a theoretical study concerning the impact of rotations of the ND on the interferometric contrast.<n>We show that the required libration temperatures should be within reach in the very near future.
  arXiv  Detail & Related papers  (2025-08-19T10:44:39Z)
• Fabrication of nano-diamonds with a single NV center: Towards matter-wave interferometry with massive objects [0.0]
  A matter-wave interferometer with a massive particle can test numerous fundamental ideas, including the spatial superposition principle.<n>We focus on utilizing nanodiamonds with embedded spins as test particles which, in combination with Stern-Gerlach forces, enable the realization of a closed-loop matter-wave interferometer in space-time.
  arXiv  Detail & Related papers  (2025-08-19T09:08:59Z)
• Electrically tunable quantum interference of atomic spins on surfaces [43.73138793116028]
  We demonstrate electrical control of quantum interference using atomic spins on an insulating film in a scanning tunneling microscope.<n>We modulate the atomically-confined magnetic interaction between the probe tip and surface atoms with a strong electric field, and drive the spin state rapidly through the energy-level anticrossing.<n>Results open new avenues for all-electrical quantum manipulation in spin-based quantum processors.
  arXiv  Detail & Related papers  (2025-06-01T14:28:36Z)
• Diamagnetic micro-chip traps for levitated nanoparticle entanglement experiments [0.0]
  Quantum Gravity Mediated Entanglement (QGEM) protocol offers a novel method to probe the quantumness of gravitational interactions at non-relativistic scales. We propose using magnetic traps based on micro-fabricated wires to trap nanoparticles for interferometric entanglement experiments.
  arXiv  Detail & Related papers  (2024-11-04T17:48:32Z)
• Long-lived entanglement of molecules in magic-wavelength optical tweezers [41.94295877935867]
  We present the first realisation of a microwave-driven entangling gate between two molecules. We show that the magic-wavelength trap preserves the entanglement, with no measurable decay over 0.5 s. The extension of precise quantum control to complex molecular systems will allow their additional degrees of freedom to be exploited across many domains of quantum science.
  arXiv  Detail & Related papers  (2024-08-27T09:28:56Z)
• Quantum Sensing from Gravity as Universal Dephasing Channel for Qubits [41.96816488439435]
  WeExploit the generic phenomena of the gravitational redshift and Aharonov-Bohm phase.<n>We show that entangled quantum states dephase with a universal rate.<n>We propose qubit-based platforms as quantum sensors for precision gravitometers and mechanical strain gauges.
  arXiv  Detail & Related papers  (2024-06-05T13:36:06Z)
• Navigating the 16-dimensional Hilbert space of a high-spin donor qudit with electric and magnetic fields [41.74498230885008]
  We present an atom-based semiconductor platform where a 16-dimensional Hilbert space is built by the combined electron-nuclear states of a single donor antimony in silicon. We demonstrate the ability to navigate this large Hilbert space using both electric and magnetic fields, with gate fidelity exceeding 99.8% on the nuclear spin.
  arXiv  Detail & Related papers  (2023-06-12T22:55:47Z)
• Tuning long-range fermion-mediated interactions in cold-atom quantum simulators [68.8204255655161]
  Engineering long-range interactions in cold-atom quantum simulators can lead to exotic quantum many-body behavior. Here, we propose several tuning knobs, accessible in current experimental platforms, that allow to further control the range and shape of the mediated interactions.
  arXiv  Detail & Related papers  (2022-03-31T13:32:12Z)
• Programmable quantum simulation of 2D antiferromagnets with hundreds of Rydberg atoms [43.55994393060723]
  Quantum simulation using synthetic systems is a promising route to solve outstanding quantum many-body problems. Here, we use programmable arrays of individual atoms trapped in optical tweezers to implement an iconic many-body problem. We push this platform to an unprecedented regime with up to 196 atoms manipulated with high fidelity.
  arXiv  Detail & Related papers  (2020-12-22T19:00:00Z)
• Zitterbewegung and Klein-tunneling phenomena for transient quantum waves [77.34726150561087]
  We show that the Zitterbewegung effect manifests itself as a series of quantum beats of the particle density in the long-time limit. We also find a time-domain where the particle density of the point source is governed by the propagation of a main wavefront. The relative positions of these wavefronts are used to investigate the time-delay of quantum waves in the Klein-tunneling regime.
  arXiv  Detail & Related papers  (2020-03-09T21:27:02Z)

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.