Many-body Chemical Reactions in a Quantum Degenerate Gas
- URL: http://arxiv.org/abs/2207.08295v2
- Date: Wed, 10 Aug 2022 16:49:21 GMT
- Title: Many-body Chemical Reactions in a Quantum Degenerate Gas
- Authors: Zhendong Zhang, Shu Nagata, Kaixuan Yao, and Cheng Chin
- Abstract summary: We report the observation of coherent and collective reactive coupling between Bose condensed atoms and molecules near a Feshbach resonance.
Faster oscillations are observed in samples with higher densities, indicating bosonic enhancement.
Our findings exemplify the highly sought-after quantum many-body chemistry and offer a new paradigm for the control of quantum chemical reactions.
- Score: 6.7460001833618986
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Chemical reactions in the quantum degenerate regime are described by mixing
of matterwave fields. Quantum coherence and bosonic enhancement are two unique
features of many-body reactions involving bosonic reactants and products. Such
collective reactions of chemicals, dubbed "super-chemistry", is an elusive goal
in quantum chemistry research. Here we report the observation of coherent and
collective reactive coupling between Bose condensed atoms and molecules near a
Feshbach resonance. Starting from an atomic condensate, the reaction begins
with a rapid formation of molecules, followed by oscillations of their
populations in the equilibration process. Faster oscillations are observed in
samples with higher densities, indicating bosonic enhancement. We present a
quantum field model which describes the dynamics well and identifies three-body
recombination as the dominant reaction process. Our findings exemplify the
highly sought-after quantum many-body chemistry and offer a new paradigm for
the control of quantum chemical reactions.
Related papers
- 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) - Parametric tuning of dynamical phase transitions in ultracold reactions [3.176473295749319]
We show that the presence of generic interaction between formed molecules can fundamentally alter the nature of the critical point.
We find that the correlations introduced by this rather general interaction induce nontrivial many-body physics.
We provide analytical and numerical descriptions of these many-body effects, along with scaling laws for the reaction yield in both the adiabatic and non-adiabatic regimes.
arXiv Detail & Related papers (2024-03-14T11:24:32Z) - Amplification of quantum transfer and quantum ratchet [56.47577824219207]
We study a model of amplification of quantum transfer and making it directed which we call the quantum ratchet model.
The ratchet effect is achieved in the quantum control model with dissipation and sink, where the Hamiltonian depends on vibrations in the energy difference synchronized with transitions between energy levels.
Amplitude and frequency of the oscillating vibron together with the dephasing rate are the parameters of the quantum ratchet which determine its efficiency.
arXiv Detail & Related papers (2023-12-31T14:04:43Z) - Quantum interference and entanglement in ultracold atom-exchange
reactions [0.0]
Coherent superpositions and entanglement are hallmarks of quantum mechanics, but they are fragile and can easily be perturbed by their environment.
Selected isolated physical systems can maintain coherence and generate entanglement using well-controlled interactions.
A fundamental question is whether coherence can be preserved in chemical reactions and then harnessed to generate entangled products.
arXiv Detail & Related papers (2023-10-11T16:00:28Z) - A Quantum-Classical Model of Brain Dynamics [62.997667081978825]
Mixed Weyl symbol is used to describe brain processes at the microscopic level.
Electromagnetic fields and phonon modes involved in the processes are treated either classically or semi-classically.
Zero-point quantum effects can be incorporated into numerical simulations by controlling the temperature of each field mode.
arXiv Detail & Related papers (2023-01-17T15:16:21Z) - Schr\"odinger cat states of a 16-microgram mechanical oscillator [54.35850218188371]
The superposition principle is one of the most fundamental principles of quantum mechanics.
Here we demonstrate the preparation of a mechanical resonator with an effective mass of 16.2 micrograms in Schr"odinger cat states of motion.
We show control over the size and phase of the superposition and investigate the decoherence dynamics of these states.
arXiv Detail & Related papers (2022-11-01T13:29:44Z) - Quantum vibrational mode in a cavity confining a massless spinor field [91.3755431537592]
We analyse the reaction of a massless (1+1)-dimensional spinor field to the harmonic motion of one cavity wall.
We demonstrate that the system is able to convert bosons into fermion pairs at the lowest perturbative order.
arXiv Detail & Related papers (2022-09-12T08:21:12Z) - Quantum-Logic Detection of Chemical Reactions [0.0]
We study the release of hyperfine energy in a reaction between an ultracold rubidium atom and isotopes of singly ionized strontium.
We detect the reaction outcome and measure the reaction rate of the chemistry ion by reading the motional state of a logic ion via quantum logic.
arXiv Detail & Related papers (2021-07-18T13:15:49Z) - Observation of Feshbach resonances between a single ion and ultracold
atoms [0.0]
Trapped atomic and molecular systems, neutral and charged, are at the forefront of quantum science.
Here we demonstrate Feshbach resonances between ions and atoms, using magnetically tunable interactions between $138$Ba$+$ ions and $6$Li atoms.
arXiv Detail & Related papers (2021-05-19T20:15:17Z) - State-to-state control of ultracold molecular reactions [3.087423765603519]
Quantum control of reactive systems has enabled microscopic probes of underlying interaction potentials.
We realize this goal through the nuclear spin degree of freedom.
We are able to control both the inputs and outputs of a bimolecular reaction with quantum state resolution.
arXiv Detail & Related papers (2020-05-21T17:55:06Z) - Optical Magnetometer: Quantum Resonances at pumping repetition rate of
1/n of the Larmor frequency [58.720142291102135]
Quantum sub-resonances at a repetition rate of $1/n$ of the Larmor frequency of the magnetic field inside the shield are experimentally observed and theoretically explained.
Investigations in single alkali atoms cells as well as mixed alkali atoms of K and Rb are presented.
arXiv Detail & Related papers (2020-02-20T09:14:56Z)
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.