Quantum logic control and entanglement in hybrid atom-molecule arrays

• URL: http://arxiv.org/abs/2602.12909v1
• Date: Fri, 13 Feb 2026 13:09:51 GMT
• Title: Quantum logic control and entanglement in hybrid atom-molecule arrays
• Authors: Chi Zhang, Sara Murciano, Nathanan Tantivasadakarn, Ran Finkelstein,
• Abstract summary: We propose and analyze a scheme for quantum logic control and measurement-based state preparation in a hybrid platform of polar molecules and neutral atoms.<n>The proposed atom-molecule controlled-phase gate is based on resonant dipole-dipole exchange between a molecular rotational transition and an atomic Rydberg transition, rendering it three orders of magnitude faster than any direct molecule-molecule entangling gate.
• Score: 2.462672164410753
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Polar molecules, with their rich internal structure, offer immense potential for fundamental physics, quantum technology, and controlled chemistry. However, their utilization is currently limited because of slow and imperfect state detection and weak dipolar interaction, limiting fast and large-scale entanglement generation. We propose and analyze a scheme for quantum logic control and measurement-based state preparation in a hybrid platform of polar molecules and neutral atoms. The method leverages fast, high-fidelity atom-molecule gates and high-fidelity atomic ancilla measurements to overcome the common challenges in molecule-only platforms, while preserving their diverse structural advantages. The proposed atom-molecule controlled-phase gate is based on resonant dipole-dipole exchange between a molecular rotational transition and an atomic Rydberg transition, rendering it three orders of magnitude faster than any direct molecule-molecule entangling gate. We further study several applications of our scheme including the preparation of molecular GHZ states for quantum enhanced precision measurements, the preparation of exotic molecular qudit states with topological order, and measurement-altered criticality. Our scheme is applicable to any polar molecule. It expands the paradigm of quantum logic control and paves the way to large-scale molecular entangled states. More generally, it highlights a concrete hybrid quantum system in which each qubit is utilized in an optimal way and where the measurement-based approach can yield a significant advantage in near-term devices.

Related papers

• Multi-Photon Quantum Rabi Models with Center-of-Mass Motion [45.73541813564926]
  We introduce a rigorous, second-quantized framework for describing multi-$Lambda$-atoms in a cavity.<n>A key feature of our approach is the systematic application of a Hamiltonian averaging theory to the atomic field operators.<n>A significant finding is the emergence of a particle-particle interaction mediated by ancillary states.
  arXiv  Detail & Related papers  (2025-07-07T09:50:48Z)
• Are Molecules Magical? Non-Stabilizerness in Molecular Bonding [50.24983453990065]
  Isolated atoms as well as molecules at equilibrium are presumed to be simple from the point of view of quantum computational complexity.<n>We show that the process of chemical bond formation is accompanied by a marked increase in the quantum complexity of the electronic ground state.
  arXiv  Detail & Related papers  (2025-04-09T08:14:27Z)
• Molecular Quantum Control Algorithm Design by Reinforcement Learning [0.0]
  In this study, we present reinforcement-learning quantum-logic spectroscopy (RL-QLS)<n>RL-QLS is a general, reinforcement-learning-designed, quantum logic approach to prepare molecular ions in single, pure quantum states.<n>The performance of the control algorithm is numerically demonstrated for the polyatomic molecule H$_3$O$+$ with 130 thermally populated eigenstates.
  arXiv  Detail & Related papers  (2024-10-15T17:59:06Z)
• Dipolar quantum solids emerging in a Hubbard quantum simulator [45.82143101967126]
  Long-range and anisotropic interactions promote rich spatial structure in quantum mechanical many-body systems. We show that novel strongly correlated quantum phases can be realized using long-range dipolar interaction in optical lattices. This work opens the door to quantum simulations of a wide range of lattice models with long-range and anisotropic interactions.
  arXiv  Detail & Related papers  (2023-06-01T16:49:20Z)
• Quantum Control of Trapped Polyatomic Molecules for eEDM Searches [0.0]
  We establish coherent control of individual quantum states in a polyatomic molecule, calcium monohydroxide (CaOH) We use these techniques to demonstrate a method for searching for the electron electric dipole moment (eEDM) These results establish a path for eEDM searches with trapped polyatomic molecules, towards orders-of-magnitude improved experimental sensitivity to time-reversal-violating physics.
  arXiv  Detail & Related papers  (2023-01-20T16:04:14Z)
• Predicting molecular vibronic spectra using time-domain analog quantum simulation [0.0]
  We introduce a method for scalable analog quantum simulation of molecular spectroscopy. Our approach can treat more complicated molecular models than previous ones, requires fewer approximations, and can be extended to open quantum systems. We experimentally demonstrate our algorithm on a trapped-ion device, exploiting both intrinsic electronic and motional degrees of freedom.
  arXiv  Detail & Related papers  (2022-09-14T11:32:55Z)
• 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)
• Tailoring the degree of entanglement of two coherently coupled quantum emitters [0.0]
  Controlled molecular entanglement can serve as a test-bench to decipher more complex physical or biological mechanisms governed by the coherent coupling. We implement hyperspectral imaging to identify pairs of coupled organic molecules trapped in a low temperature matrix. We also demonstrate far-field selective excitation of the long-lived subradiant delocalized states with a laser field tailored in amplitude and phase.
  arXiv  Detail & Related papers  (2021-09-22T08:30:59Z)
• Counteracting dephasing in Molecular Nanomagnets by optimized qudit encodings [60.1389381016626]
  Molecular Nanomagnets may enable the implementation of qudit-based quantum error-correction codes. A microscopic understanding of the errors corrupting the quantum information encoded in a molecular qudit is essential.
  arXiv  Detail & Related papers  (2021-03-16T19:21:42Z)
• 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)
• Identification of molecular quantum states using phase-sensitive forces [0.0]
  We demonstrate an enhanced quantum protocol for molecular state detection using state-dependent forces. Our approach is based on interfering a reference and a signal force applied to a single atomic and molecular ion. We use this phase information to identify states embedded in a dense molecular energy-level structure and to monitor state-to-state inelastic scattering processes.
  arXiv  Detail & Related papers  (2020-04-11T04:52:48Z)

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.