Scattering theory for cavity-assisted spin-motion-photon interactions

• URL: http://arxiv.org/abs/2606.26542v1
• Date: Thu, 25 Jun 2026 02:34:58 GMT
• Title: Scattering theory for cavity-assisted spin-motion-photon interactions
• Abstract summary: Cavity-assisted photon scattering (CAPS) is a powerful mechanism for realizing strong interactions between qubits and flying photons.<n>Recently, the motional quantum state has emerged as an important building block for quantum information processing with atomic qubits.<n>We develop a complete analytical framework for CAPS that incorporates the coherent interaction between atomic motion and a reflected photon.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Cavity-assisted photon scattering (CAPS) is a powerful mechanism for realizing strong interactions between the internal states of stationary qubits and flying photons, underpinning a broad range of hybrid atom-photon protocols including remote entanglement generation and heralded atom-photon gates. Recently, the motional quantum state has emerged as an important building block for quantum information processing with atomic qubits, both as a coherently controllable degree of freedom and as a fundamental error channel through undesired spin-motion coupling. For the resonant-coupling regime of cavity quantum electrodynamics relevant to CAPS operations, however, the analytical formulation of spin-motion-photon coupling has so far remained elusive. Here, we develop a complete analytical framework for CAPS that incorporates the coherent interaction between atomic motion and a reflected photon by extending scattering theory to include the motional degree of freedom. The resulting compact operator-based input-output relation applies uniformly across various cavity geometries, spin-dependent trapping potentials, and nonidentical multiple spins. As an exemplary application, we use the framework to elucidate how atomic motion affects CAPS-based atom-photon gates, identifying the parameter regimes that suppress motion-induced errors. Our framework provides a theoretical foundation both for mitigating motional errors in CAPS operations and for deliberately exploiting motion-photon interaction at the atom-photon interface.

Related papers

• Nonclassical Driven-Dissipative Dynamics in Collective Quantum Optics [51.56484100374058]
  We study ensembles of interacting quantum emitters coherently driven by a laser field and coupled to photonic structures.<n>We find that off-resonant virtual states may gain population through dissipation, redefining their role in open systems.<n>Our models address challenges like inhomogeneous broadening and decoherence, demonstrating the feasibility of harnessing cooperative light-matter effects for quantum technologies.
  arXiv  Detail & Related papers  (2025-09-12T20:01:55Z)
• 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)
• Recoil-induced errors and their correction in photon-mediated entanglement between atom qubits [0.0]
  We study the effects of atomic motion on spontaneous emission coupled into arbitrary optical modes.<n>We arrive at a coherent physical picture in the form of "kick operators" associated with each instant in the photonic wavepackets.<n>This proposed correction technique removes overheads associated with the thermal motion of atoms, and may greatly increase entanglement rates in long-distance quantum network links.
  arXiv  Detail & Related papers  (2025-03-21T04:13:10Z)
• Engineering interactions by collective coupling of atom pairs to cavity photons for entanglement generation [0.0]
  Engineering atom-atom interactions is essential for controlling novel phases of matter and for efficient preparation of many-body entangled states.<n>We show that induced atom-photon interactions can generate robust many-body entanglement in two-mode ultracold bosons.<n>Our results pave the way for engineering atom-atom interactions to study novel phases of light and matter in hybrid atom-photon systems.
  arXiv  Detail & Related papers  (2024-06-20T16:23:05Z)
• Spin- and Momentum-Correlated Atom Pairs Mediated by Photon Exchange and Seeded by Vacuum Fluctuations [0.0]
  We experimentally demonstrate a mechanism for generating pairs of atoms in well-defined spin and momentum modes. We observe a collectively enhanced production of pairs and probe interspin correlations in momentum space. Our results offer promising prospects for quantum-enhanced interferometry and quantum simulation experiments.
  arXiv  Detail & Related papers  (2023-03-20T17:59:03Z)
• All-Optical Nuclear Quantum Sensing using Nitrogen-Vacancy Centers in Diamond [52.77024349608834]
  Microwave or radio-frequency driving poses a significant limitation for miniaturization, energy-efficiency and non-invasiveness of quantum sensors. We overcome this limitation by demonstrating a purely optical approach to coherent quantum sensing. Our results pave the way for highly compact quantum sensors to be employed for magnetometry or gyroscopy applications.
  arXiv  Detail & Related papers  (2022-12-14T08:34:11Z)
• Controlling photon polarisation with a single quantum dot spin [0.0]
  We demonstrate the control of giant polarisation rotations induced by a single electron spin. We find that the polarisation state of the reflected photons can be manipulated in most of the Poincar'e sphere, through controlled spin-induced rotations. This control allows the operation of spin-photon interfaces in various configurations, including at zero or low magnetic fields.
  arXiv  Detail & Related papers  (2022-12-07T16:37:59Z)
• Tunable photon-mediated interactions between spin-1 systems [68.8204255655161]
  We show how to harness multi-level emitters with several optical transitions to engineer photon-mediated interactions between effective spin-1 systems. Our results expand the quantum simulation toolbox available in cavity QED and quantum nanophotonic setups.
  arXiv  Detail & Related papers  (2022-06-03T14:52:34Z)
• Correlated steady states and Raman lasing in continuously pumped and probed atomic ensembles [68.8204255655161]
  We consider an ensemble of Alkali atoms that are continuously optically pumped and probed. Due to the collective scattering of photons at large optical depth, the steady state of atoms does not correspond to an uncorrelated tensor-product state. We find and characterize regimes of Raman lasing, akin to the model of a superradiant laser.
  arXiv  Detail & Related papers  (2022-05-10T06:54:54Z)
• Waveguide quantum electrodynamics: collective radiance and photon-photon correlations [151.77380156599398]
  Quantum electrodynamics deals with the interaction of photons propagating in a waveguide with localized quantum emitters. We focus on guided photons and ordered arrays, leading to super- and sub-radiant states, bound photon states and quantum correlations with promising quantum information applications.
  arXiv  Detail & Related papers  (2021-03-11T17:49:52Z)
• Theory of waveguide-QED with moving emitters [68.8204255655161]
  We study a system composed by a waveguide and a moving quantum emitter in the single excitation subspace. We first characterize single-photon scattering off a single moving quantum emitter, showing both nonreciprocal transmission and recoil-induced reduction of the quantum emitter motional energy.
  arXiv  Detail & Related papers  (2020-03-20T12:14:10Z)
• Atom-Photon Spin-Exchange Collisions Mediated by Rydberg Dressing [11.207403145794927]
  We show that photons propagating through a Rydberg-dressed atomic ensemble can exchange its spin state with a single atom. Such a spin-exchange collision exhibits both dissipative and coherent features, depending on the interaction strength.
  arXiv  Detail & Related papers  (2020-03-19T12:04:53Z)

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.