Related papers: Atom--photon Entanglement with a Single Trapped Cesium Atom

Atom--photon Entanglement with a Single Trapped Cesium Atom

URL: http://arxiv.org/abs/2605.28968v1
Date: Wed, 27 May 2026 18:18:18 GMT
Title: Atom--photon Entanglement with a Single Trapped Cesium Atom
Abstract summary: We demonstrate atom--photon entanglement using a single cesium atom trapped in an optical tweezer.<n> Entanglement is generated by resonant excitation and subsequent spontaneous decay, which entangles the atomic Zeeman state with photon polarization.<n>Results establish a free-space Cs atom--photon interface and provide a step toward dual-species Rb--Cs quantum networking.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: We demonstrate atom--photon entanglement using a single cesium atom trapped in an optical tweezer. Entanglement is generated by resonant excitation and subsequent spontaneous decay, which entangles the atomic Zeeman state with photon polarization. The photon is collected with a high numerical aperture objective (NA = 0.55) and coupled into a single-mode fiber, enabling atom photon measurements and measurement of the Bell-state fidelity. We obtain raw entanglement fidelity of ${\mathcal F} = 0.942(16)$ and inferred fidelity of ${\mathcal F}_{\rm inf} = 0.962(26)$ after correcting independently characterized atom measurement errors. Compared with related free-space experiments using $^{87}$Rb, the multilevel structure of the relevant excited state in $^{133}$Cs requires the use of a single short excitation pulse in each entanglement attempt in order to suppress unwanted re-excitation. These results establish a free-space Cs atom--photon interface and provide a step toward dual-species Rb--Cs quantum networking.

Related papers

Mapping photon-number regimes in single-emitter lasers [41.99844472131922]
We present a numerical analysis of an open quantum system consisting of an incoherently pumped three-level emitter strongly coupled to a single cavity mode.<n>We find that laser behavior can emerge from minimal photon populations.<n>Our findings can be applied to define the operational limits of single-emitter light sources.
arXiv Detail & Related papers (2026-06-30T07:10:49Z)
Interaction of twisted light with free twisted atoms [0.0]
We show that vortex photons can transfer angular momentum to the atomic center of mass with near-perfect efficiency in head-on collisions.<n>For femtosecond pulses, the finite spatial coherence of the photon leads to measurable shaping of the resonant absorption lines.<n>We demonstrate a transverse recoil of the atom in a vicinity of the photonic vortex, dubbed "the superkick"
arXiv Detail & Related papers (2026-04-04T06:42:22Z)
Efficient and compact quantum network node based on a parabolic mirror on an optical chip [0.0]
We demonstrate a neutral atom networking node that combines high photon collection efficiency with high atom photon entanglement fidelity.<n>A parabolic mirror is used both to form the trap and to collect fluorescence from a single rubidium atom.<n>Our results establish a robust, cavity free neutral atom interface that operates near the limit set by the collection optics numerical aperture.
arXiv Detail & Related papers (2026-01-19T22:07:31Z)
Single-atom imaging of ${}^{173}$Yb in optical tweezers loaded by a five-beam magneto-optical trap [37.43981963592673]
We report on the trapping and imaging of individual ytterbium atoms in arrays of optical tweezers.<n>In our five-beam magneto-optical trap, gravity balances the radiation pressure of a single upward-directed beam.<n>We demonstrate the first single-atom-resolved imaging of the fermionic isotope, large-spin $173$Yb.
arXiv Detail & Related papers (2025-05-12T09:14:02Z)
Realisation of a Coherent and Efficient One-Dimensional Atom [0.15274583259797847]
A coherent and efficiently coupled one-dimensional atom provides a large nonlinearity, enabling photonic quantum gates. Here, we use a semiconductor quantum dot in an open microcavity as an implementation of a one-dimensional atom. Our results pave the way towards the creation of exotic photonic states and two-photon phase gates.
arXiv Detail & Related papers (2024-02-19T21:48:12Z)
High-throughput quantum photonic devices emitting indistinguishable photons in the telecom C-band [28.279056210896716]
Single indistinguishable photons at telecom C-band wavelengths are essential for quantum networks and the future quantum internet. We demonstrate the high- throughput fabrication of quantum-photonic integrated devices operating at C-band wavelengths based on epitaxial semiconductor quantum dots. Further improvements in yield and coherence properties will pave the way for implementing single-photon non-linear devices and advanced quantum networks at telecom wavelengths.
arXiv Detail & Related papers (2023-04-05T15:39:22Z)
Photonic indistinguishability of the tin-vacancy center in nanostructured diamond [41.74498230885008]
Tin-vacancy centers in diamond are promising spin-photon interfaces owing to their high quantum-efficiency. We report the generation of single photons with $99.7+0.3_-2.5%$ purity and $63(9)%$ indistinguishability from a resonantly excited tin-vacancy center.
arXiv Detail & Related papers (2022-06-30T12:38:44Z)
Quantum density matrix theory for a laser without adiabatic elimination of the population inversion: transition to lasing in the class-B limit [62.997667081978825]
No class-B quantum density-matrix model is available to date, capable of accurately describing coherence and photon correlations within a unified theory. Here we carry out a density-matrix theoretical approach for generic class-B lasers, and provide closed equations for the photonic and atomic reduced density matrix in the Fock basis of photons. This model enables the study of few-photon bifurcations and non-classical photon correlations in class-B laser devices, also leveraging quantum descriptions of coherently coupled nanolaser arrays.
arXiv Detail & Related papers (2022-05-26T16:33:51Z)
Photon-mediated Stroboscopic Quantum Simulation of a $\mathbb{Z}_{2}$ Lattice Gauge Theory [58.720142291102135]
Quantum simulation of lattice gauge theories (LGTs) aims at tackling non-perturbative particle and condensed matter physics. One of the current challenges is to go beyond 1+1 dimensions, where four-body (plaquette) interactions, not contained naturally in quantum simulating devices, appear. We show how to prepare the ground state and measure Wilson loops using state-of-the-art techniques in atomic physics.
arXiv Detail & Related papers (2021-07-27T18:10:08Z)
Sub-ms, nondestructive, time-resolved quantum-state readout of a single, trapped neutral atom [0.0]
We achieve fast, nondestructive quantum-state readout via fluorescence detection of a single $87$Rb atom. The atom is driven by linearly-polarized readout laser beams, making the scheme insensitive to the distribution of atomic population. Our results are likely to find application in neutral-atom quantum computing and simulation.
arXiv Detail & Related papers (2020-07-18T13:02:49Z)
Near-ideal spontaneous photon sources in silicon quantum photonics [55.41644538483948]
Integrated photonics is a robust platform for quantum information processing. Sources of single photons that are highly indistinguishable and pure, that are either near-deterministic or heralded with high efficiency, have been elusive. Here, we demonstrate on-chip photon sources that simultaneously meet each of these requirements.
arXiv Detail & Related papers (2020-05-19T16:46:44Z)
Resonant high-energy bremsstrahlung of ultrarelativistic electrons in the field of a nucleus and a pulsed light wave [68.8204255655161]
Research investigates the resonant high-energy spontaneous bremsstrahlung of ultrarelativistic electrons with considerable energies in the field of a nucleus and a quasimonochromatic laser wave.
arXiv Detail & Related papers (2020-04-05T16:27:11Z)

This list is automatically generated from the titles and abstracts of the papers in this site.