Experimental evidence of quantum interferences in CO-H$_2$ rotational energy transfer at room temperature

• URL: http://arxiv.org/abs/2504.04403v1
• Date: Sun, 06 Apr 2025 08:05:31 GMT
• Title: Experimental evidence of quantum interferences in CO-H$_2$ rotational energy transfer at room temperature
• Authors: Hamza Labiad, Alexandre Faure, Ian R. Sims,
• Abstract summary: Theoretically predicted quantum interferences in the CO-H$ collision$al system are experimentally observed for the first time at room temperature, and excellent agreement between theory and experiment is observed.<n>Results provide a valuable benchmark for validating the anisotropic part of the potential energy surface, thereby supporting the theoretical modeling of CO emission in warm astrophysical environments such as photodissociation regions.
• Score: 44.99833362998488
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Using time-resolved infrared-vacuum-ultraviolet double-resonance spectroscopy, experimental room temperature measurements of state-to-state rate coefficients for rotational energy transfer within the X $^1\Sigma^+(v=2)$ vibrational state of CO due to H$_2$ collisions have been compared to accurate 4-D close-coupling quantum calculations. Theoretically predicted quantum interferences in the CO-H$_2$ collisional system are experimentally observed for the first time at room temperature, and excellent agreement between theory and experiment is observed. These results provide a valuable benchmark for validating the anisotropic part of the potential energy surface, thereby supporting the theoretical modeling of CO emission in warm astrophysical environments such as photodissociation regions.

Related papers

• A New Bite Into Dark Matter with the SNSPD-Based QROCODILE Experiment [55.46105000075592]
  We present the first results from the Quantum Resolution-d Cryogenic Observatory for Dark matter Incident at Low Energy (QROCODILE) The QROCODILE experiment uses a microwire-based superconducting nanowire single-photon detector (SNSPD) as a target and sensor for dark matter scattering and absorption. We report new world-leading constraints on the interactions of sub-MeV dark matter particles with masses as low as 30 keV.
  arXiv  Detail & Related papers  (2024-12-20T19:00:00Z)
• Revisiting Joule-expansion experiments with a quantum gas [0.0]
  We revisit the classic Joule-expansion experiments, now with a quantum-degenerate atomic Bose gas. In contrast to the classical-gas experiments, where no temperature change was measured, here we observe both cooling and heating effects.
  arXiv  Detail & Related papers  (2024-10-31T17:59:46Z)
• Divergence of thermalization rates driven by the competition between finite temperature and quantum coherence [10.256367888517563]
  We observe a divergence of thermalization rates of quantum matters when the temperature approaches zero. We find that the quantum coherence and bosonic stimulation of superfluid induces the divergence while the finite temperature and the many-body interactions are suppressing the divergence.
  arXiv  Detail & Related papers  (2024-10-30T02:10:29Z)
• Limits for coherent optical control of quantum emitters in layered materials [49.596352607801784]
  coherent control of a two-level system is among the most essential challenges in modern quantum optics. We use a mechanically isolated quantum emitter in hexagonal boron nitride to explore the individual mechanisms which affect the coherence of an optical transition under resonant drive. New insights on the underlying physical decoherence mechanisms reveals a limit in temperature until which coherent driving of the system is possible.
  arXiv  Detail & Related papers  (2023-12-18T10:37:06Z)
• Thermal masses and trapped-ion quantum spin models: a self-consistent approach to Yukawa-type interactions in the $λ\!φ^4$ model [44.99833362998488]
  A quantum simulation of magnetism in trapped-ion systems makes use of the crystal vibrations to mediate pairwise interactions between spins. These interactions can be accounted for by a long-wavelength relativistic theory, where the phonons are described by a coarse-grained Klein-Gordon field. We show that thermal effects, which can be controlled by laser cooling, can unveil this flow through the appearance of thermal masses in interacting QFTs.
  arXiv  Detail & Related papers  (2023-05-10T12:59:07Z)
• Quantum Monte Carlo study of the role of p-wave interactions in ultracold repulsive Fermi gases [0.0]
  We investigate the ground-state properties of single-component Fermi gases with short-range repulsive interactions. A comparison against recently derived second-order perturbative results shows good agreement in a broad range of interaction strength. We find remarkable agreement with a recently derived fourth-order expansion that includes $p$-wave contributions.
  arXiv  Detail & Related papers  (2022-12-18T20:08:32Z)
• Heat transport and rectification via quantum statistical and coherence asymmetries [0.0]
  We show that heat rectification is possible even with symmetric medium-bath couplings if the two baths differ in quantum statistics or coherence. Our results can be significant for heat management in hybrid open quantum systems or solid-state thermal circuits.
  arXiv  Detail & Related papers  (2022-04-14T15:59:03Z)
• Experimental verification of fluctuation relations with a quantum computer [68.8204255655161]
  We use a quantum processor to experimentally validate a number of theoretical results in non-equilibrium quantum thermodynamics. Our experiments constitute the experimental basis for the understanding of the non-equilibrium energetics of quantum computation.
  arXiv  Detail & Related papers  (2021-06-08T14:16:12Z)
• Nonequilibrium fluctuations of a quantum heat engine [0.0]
  We experimentally investigate the efficiency and nonequilibrium entropy production statistics of a spin-1/2 quantum Otto cycle. Our results characterize the statistical features of a small-scale thermal machine in the quantum domain.
  arXiv  Detail & Related papers  (2021-04-27T18:53:53Z)
• Quantum versus Classical Regime in Circuit Quantum Acoustodynamics [8.00487309438664]
  We experimentally study a circuit quantum acoustodynamics system, which consists of a superconducting artificial atom. We show that the propagation of microwave photons in the microwave transmission line can be controlled by a few phonons in the acoustic wave resonator.
  arXiv  Detail & Related papers  (2020-11-10T12:49:35Z)
• Probing eigenstate thermalization in quantum simulators via fluctuation-dissipation relations [77.34726150561087]
  The eigenstate thermalization hypothesis (ETH) offers a universal mechanism for the approach to equilibrium of closed quantum many-body systems. Here, we propose a theory-independent route to probe the full ETH in quantum simulators by observing the emergence of fluctuation-dissipation relations. Our work presents a theory-independent way to characterize thermalization in quantum simulators and paves the way to quantum simulate condensed matter pump-probe experiments.
  arXiv  Detail & Related papers  (2020-07-20T18:00:02Z)
• Exploring 2D synthetic quantum Hall physics with a quasi-periodically driven qubit [58.720142291102135]
  Quasi-periodically driven quantum systems are predicted to exhibit quantized topological properties. We experimentally study a synthetic quantum Hall effect with a two-tone drive.
  arXiv  Detail & Related papers  (2020-04-07T15:00:41Z)

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.