Highly Efficient Creation and Detection of Deeply-bound Molecules via Invariant-based Inverse Engineering with Feasible Modified Drivings

• URL: http://arxiv.org/abs/2310.14499v3
• Date: Mon, 12 Feb 2024 02:03:16 GMT
• Title: Highly Efficient Creation and Detection of Deeply-bound Molecules via Invariant-based Inverse Engineering with Feasible Modified Drivings
• Authors: Jiahui Zhang
• Abstract summary: STIRAP and its variants are widely used to prepare ultracold deeply-bound molecules. The main obstacle is the presence of losses and the requirement to make the dynamics adiabatic. A theoretical method for the efficient and robust creation and detection of deeply-bound molecules is proposed.
• Score: 15.13027565390905
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Stimulated Raman Adiabatic Passage (STIRAP) and its variants, such as multi-state chainwise-STIRAP allow efficiently transferring the populations in multi-state system and have been widely used to prepare ultracold deeply-bound molecules. However, their transfer efficiencies are generally imperfect. The main obstacle is the presence of losses and the requirement to make the dynamics adiabatic. To this end, in the present paper a theoretical method for the efficient and robust creation and detection of deeply-bound molecules is proposed. The simple three- and five-level systems with states chainwise coupled by optical fields are considered. In the regime of large detuning, the major molecular losses are pre-suppressed by reducing the dynamics of the three- and five-level molecular systems to those of effective two- and three-level counterparts, respectively. Consequently, two-level counterpart can be directly compatible with two kinds of "Invariant-based Inverse Engineering" (IIE) recipes, the results show that both protocols give comparable performance and have good experimental feasibility. For the five-level case, by considering a relation among the four incident pulses, we show that the M-type structure can be generalized into an effective $Lambda$-type one with the simplest resonant coupling. Therefore, this generalized model can also be directly compatible with "IIE" recipe. Numerical calculations show that the weakly-bound molecules can be efficiently transferred to their deeply-bound states without strong laser intensity, and the stability against parameter variations is well preserved. Finally, the detection of ultracold deeply-bound molecules is discussed, the results show that all the protocols allow efficient detection of molecules.

Related papers

• Conditional Synthesis of 3D Molecules with Time Correction Sampler [58.0834973489875]
  Time-Aware Conditional Synthesis (TACS) is a novel approach to conditional generation on diffusion models. It integrates adaptively controlled plug-and-play "online" guidance into a diffusion model, driving samples toward the desired properties.
  arXiv  Detail & Related papers  (2024-11-01T12:59:25Z)
• Formation of ultracold deeply-bound molecules via multi-state chainwise coincident pulses technique [15.13027565390905]
  The method is based on the three-state coincident pulses technique and the generalized five-state coincident pulses technique. For the three-state system, the technique can efficiently transfer the populations from the Feshbach state to the deeply-bound state via a train of $N$ pairs of resonant and coincident pump and Stokes pulses. For the five-state system, it is found that this M-type system can be generalized into a $Lambda$-type structure with the simplest resonant coupling.
  arXiv  Detail & Related papers  (2024-03-21T10:52:07Z)
• Molecule Design by Latent Prompt Transformer [76.2112075557233]
  This work explores the challenging problem of molecule design by framing it as a conditional generative modeling task. We propose a novel generative model comprising three components: (1) a latent vector with a learnable prior distribution; (2) a molecule generation model based on a causal Transformer, which uses the latent vector as a prompt; and (3) a property prediction model that predicts a molecule's target properties and/or constraint values using the latent prompt.
  arXiv  Detail & Related papers  (2024-02-27T03:33:23Z)
• Measurement-Induced Transmon Ionization [69.65384453064829]
  We develop a comprehensive framework which provides a physical picture of the origin of transmon ionization. This framework identifies the multiphoton resonances responsible for transmon ionization. It also allows one to efficiently compute numerical estimates of the photon number threshold for ionization.
  arXiv  Detail & Related papers  (2024-02-09T18:46:50Z)
• Understanding the Cavity Born-Oppenheimer Approximation [0.0]
  vibrational strong coupling between molecular vibrations and light modes can significantly change molecular properties. We show that we can recover CBO energies and spectra to high accuracy using only out-of-cavity quantities.
  arXiv  Detail & Related papers  (2024-01-07T16:05:18Z)
• Highly Efficient Creation and Detection of Ultracold Deeply-Bound Molecules via Chainwise Stimulated Raman Shortcut-to-Adiabatic Passage [12.476888264563012]
  Chainwise stimulated Raman adiabatic passage (C-STIRAP) in M-type molecular system is a good alternative in creating ultracold deeply-bound molecules. In this paper, we find that shortcut-to-adiabatic (STA) passage fits very well in improving the performance of the C-STIRAP.
  arXiv  Detail & Related papers  (2023-10-17T08:38:04Z)
• Stochastic Optimal Control for Collective Variable Free Sampling of Molecular Transition Paths [60.254555533113674]
  We consider the problem of sampling transition paths between two given metastable states of a molecular system. We propose a machine learning method for sampling said transitions.
  arXiv  Detail & Related papers  (2022-06-27T14:01:06Z)
• Non-Gaussian superradiant transition via three-body ultrastrong coupling [62.997667081978825]
  We introduce a class of quantum optical Hamiltonian characterized by three-body couplings. We propose a circuit-QED scheme based on state-of-the-art technology that implements the considered model.
  arXiv  Detail & Related papers  (2022-04-07T15:39:21Z)
• Coherent Atom Transport via Enhanced Shortcuts to Adiabaticity: Double-Well Optical Lattice [0.0]
  We study fast atomic transport in a moving em double-well optical lattice. We use two classes of quantum-control methods: shortcuts to adiabaticity (STA) and enhanced STA. This study has direct implications for neutral-atom quantum computing.
  arXiv  Detail & Related papers  (2021-12-28T08:39:49Z)
• Optimal control of molecular spin qudits [58.720142291102135]
  We demonstrate, numerically, the possibility of manipulating the spin states of molecular nanomagnets with shaped microwave pulses. The state-to-state or full gate transformations can be performed in this way in shorter times than using simple monochromatic resonant pulses. The application of optimal control techniques can facilitate the implementation of quantum technologies based on molecular spin qudits.
  arXiv  Detail & Related papers  (2021-11-30T11:50:46Z)
• Robust stimulated Raman shortcut-to-adiabatic passage by invariant-based optimal control [5.290927777455239]
  We present a robust approach to speed up STIRAP with inversely invariant-based shortcut to adiabaticity. This technique has widely theoretical and experimental applications in many fields of physics, chemistry, and beyond. Results provide an optimal route toward manipulating the evolution of three-level quantum systems in future quantum information processing.
  arXiv  Detail & Related papers  (2021-03-02T00:56:15Z)

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.