Atomic and molecular interactions with photons articles within Nature

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  • Article
    | Open Access

    Time-resolved photoelectron circular dichroism with a temporal resolution of 2.9 fs is used to track the ultrafast electron dynamics following ultraviolet excitation of neutral chiral molecules, which generate chiral currents that exhibit periodic rotation direction reversal.

    • Vincent Wanie
    • , Etienne Bloch
    •  & Francesca Calegari

  • Article
    | Open Access

    Sea-based optical clocks combining a molecular iodine spectrometer, fibre frequency comb and electronics for monitoring and control demonstrate high precision in a smaller volume than active hydrogen masers.

    • Jonathan D. Roslund
    • , Arman Cingöz
    •  & Martin M. Boyd

  • Article
    | Open Access

    An experiment sensitive to higher-order quantum electrodynamics effects and electron–electron interactions in the high-Z regime was performed using a multi-reference method based on Doppler-tuned X-ray emission from stored relativistic uranium ions with different charge states.

    • R. Loetzsch
    • , H. F. Beyer
    •  & M. Trassinelli

  • Article |

    The initial steps of the ion solvation process are observed for the solvation of a single sodium ion in liquid helium, opening possibilities for benchmarking theoretical descriptions of ion solvation.

    • Simon H. Albrechtsen
    • , Constant A. Schouder
    •  & Henrik Stapelfeldt

  • Article |

    Under strong excitation, inhomogeneously broadened solid-state emitters coupled with high cooperativity to a cavity demonstrate collectively induced transparency and dissipative many-body dynamics, resulting from cavity–ion coupling.

    • Mi Lei
    • , Rikuto Fukumori
    •  & Andrei Faraon

  • Article
    | Open Access

    A matter-wave interferometer is demonstrated with an interferometric phase noise below the standard quantum limit, combining two core concepts of quantum mechanics, that a particle can simultaneously be in two places at once and entanglement between distinct particles.

    • Graham P. Greve
    • , Chengyi Luo
    •  & James K. Thompson

  • Article
    | Open Access

    Rabi dynamics between the ground state and an excited state in helium atoms are generated using femtosecond extreme-ultraviolet pulses from a seeded free-electron laser, which may allow ultrafast manipulation of coherent processes at short wavelengths.

    • Saikat Nandi
    • , Edvin Olofsson
    •  & Jan Marcus Dahlström

  • Article |

    Attosecond size-resolved cluster spectroscopy is introduced and the effect that the addition of single water molecules has is measured, indicating a direct link between electronic structure and attosecond photoionization dynamics.

    • Xiaochun Gong
    • , Saijoscha Heck
    •  & Hans Jakob Wörner

  • Article
    | Open Access

    Heralded entanglement between two independently trapped single rubidium atoms is generated over long telecom fibre links using quantum frequency conversion in an important step towards the realization of large-scale quantum network links.

    • Tim van Leent
    • , Matthias Bock
    •  & Harald Weinfurter

  • Article
    | Open Access

    Measuring the hyperfine structure of a single helium-3 ion in a Penning trap enables direct measurement of the nuclear magnetic moment of helium-3 and provides the high accuracy needed for NMR-based magnetometry.

    • A. Schneider
    • , B. Sikora
    •  & K. Blaum

  • Article
    | Open Access

    A study reports a quantum gravity gradient sensor with a design that eliminates the need for long measurement times, and demonstrates the detection of an underground tunnel in an urban environment.

    • Ben Stray
    • , Andrew Lamb
    •  & Michael Holynski

  • Article |

    Directly coupling cavity photons to the photo-association resonances of pairs of atoms in a strongly interacting Fermi gas generates pair polaritons—hybrid excitaions coherently mixing photons, atom pairs and molecules.

    • Hideki Konishi
    • , Kevin Roux
    •  & Jean-Philippe Brantut

  • Article |

    The quantum charge-coupled device architecture is demonstrated, with its various elements integrated into a programmable trapped-ion quantum computer and performing simple quantum operations with state-of-the-art levels of error.

    • J. M. Pino
    • , J. M. Dreiling
    •  & B. Neyenhuis

  • Article |

    A many-atom state of trapped 171Yb atoms that are entangled on an optical atomic-clock transition overcomes the standard quantum limit, providing a proof-of-principle demonstration towards entanglement-based optical atomic clocks.

    • Edwin Pedrozo-Peñafiel
    • , Simone Colombo
    •  & Vladan Vuletić

  • Article |

    The precision of laser spectroscopy of highly charged ions is improved by eight orders of magnitude by cooling trapped, highly charged ions and using quantum logic spectroscopy, thereby enabling tests of fundamental physics.

    • P. Micke
    • , T. Leopold
    •  & P. O. Schmidt

  • Letter |

    Multi-qubit entangling gates are realized by simultaneously driving multiple motional modes of a linear chain of trapped ions with modulated external fields, achieving a fidelity of about 93 per cent with four qubits.

    • Yao Lu
    • , Shuaining Zhang
    •  & Kihwan Kim

  • Letter |

    Frequency modulation is used to create ‘Floquet polaritons’—strongly interacting quasi-particles that exist in a customizable set of modes.

    • Logan W. Clark
    • , Ningyuan Jia
    •  & Jonathan Simon

  • Letter |

    An array of superconducting qubits in an open one-dimensional waveguide is precisely controlled to create an artificial quantum cavity–atom system that reaches the strong-coupling regime without substantial decoherence.

    • Mohammad Mirhosseini
    • , Eunjong Kim
    •  & Oskar Painter

  • Letter |

    A single logical qubit is encoded, manipulated and read out using a superposition of displaced squeezed states of the harmonic motion of a trapped calcium ion.

    • C. Flühmann
    • , T. L. Nguyen
    •  & J. P. Home

  • Letter |

    Improved techniques allow the measurement of a frequency difference with an uncertainty of the order of 10–19 between two independent atomic optical lattice clocks, suggesting that they may be able to improve state-of-the-art geodetic techniques.

    • W. F. McGrew
    • , X. Zhang
    •  & A. D. Ludlow

  • Letter |

    Fast and high-fidelity two-qubit logic gates are demonstrated by using amplitude-shaped laser pulses to ensure that the gate operation is insensitive to the optical phase of the pulses.

    • V. M. Schäfer
    • , C. J. Ballance
    •  & D. M. Lucas

  • Letter |

    Excitations to Rydberg states in a gas of ultracold atoms are used to produce a robust, nonlinear phase shift of exactly π/2 between two photons, which is protected against variations in experimental parameters by a symmetry of the system.

    • Jeff D. Thompson
    • , Travis L. Nicholson
    •  & Vladan Vuletić

  • Letter |

    Spin–orbit coupling is implemented in an optical lattice clock using a narrow optical transition in fermionic 87Sr atoms, thus mitigating the heating problems of previous experiments with alkali atoms and offering new prospects for future investigations.

    • S. Kolkowitz
    • , S. L. Bromley
    •  & J. Ye

  • Letter |

    A highly sensitive electrometer is reported that is based on a Schrödinger-cat state in a Rydberg atom, that reaches a sensitivity beyond the standard quantum limit and can compete with state-of-the-art electric field measurements performed using electromechanical resonators and single-electron transistors.

    • Adrien Facon
    • , Eva-Katharina Dietsche
    •  & Sébastien Gleyzes

  • Letter |

    To enable two photons to interact, a single atom in an optical resonator is used to build a universal photon–photon quantum gate; this could lead to applications in long-distance quantum communication and scalable quantum computing that require the processing of optical quantum information.

    • Bastian Hacker
    • , Stephan Welte
    •  & Stephan Ritter

  • Letter |

    A data-analytical approach that can extract the history and dynamics of complex systems from noisy snapshots on timescales much shorter than the uncertainty with which the data were recorded is described; the approach is demonstrated by extracting the dynamics on the few-femtosecond timescale from experimental data recorded with 300-femtosecond timing uncertainty.

    • R. Fung
    • , A. M. Hanna
    •  & A. Ourmazd

  • Letter |

    Detecting the quantum states of molecules is harder than detecting those of atoms; here, a way around this problem is found by co-trapping a molecular and an atomic ion, using the state of the atomic ion to non-destructively determine that of the molecular ion.

    • Fabian Wolf
    • , Yong Wan
    •  & Piet O. Schmidt

  • Letter |

    Harnessing the entanglement of different ionic species could bring new flexibility in quantum computing, and now two groups independently demonstrate entanglement between different atomic species; Tan et al. achieve entanglement between different elements, whereas the related paper by Ballance et al. shows entanglement between different atomic isotopes, together demonstrating a first step towards mixed-species quantum logic.

    • T. R. Tan
    • , J. P. Gaebler
    •  & D. J. Wineland

  • Letter |

    The dynamics of two correlated electrons can be reconstructed from the quantum interference of low-lying doubly excited states in helium, as observed in attosecond transient-absorption spectra, and can be controlled by tuning the interaction with a visible laser field of variable intensity.

    • Christian Ott
    • , Andreas Kaldun
    •  & Thomas Pfeifer

  • Letter |

    Magneto-optical trapping is the standard method for laser cooling and confinement of atomic gases but now this technique has been demonstrated for the diatomic molecule strontium monofluoride, leading to the lowest temperature yet achieved by cooling a molecular gas.

    • J. F. Barry
    • , D. J. McCarron
    •  & D. DeMille

  • Letter |

    Reconstruction of the quantum trajectories of a superconducting circuit that evolves under the competing influences of continuous weak measurement and Rabi drive makes it possible to deduce the most probable path through quantum state space.

    • S. J. Weber
    • , A. Chantasri
    •  & I. Siddiqi

  • Letter |

    Intermolecular Coulombic decay transfers excess energy to neighbouring molecules, which then lose a low-energy (and, hence, genotoxic) electron; here the process is experimentally confirmed to be site-selective and highly efficient, possibly enabling more targeted radiation therapy.

    • F. Trinter
    • , M. S. Schöffler
    •  & T. Jahnke

  • Letter |

    By coupling light to strongly interacting atomic Rydberg states in a dispersive regime, it is possible to induce individual photons to travel as massive particles with strong mutual attraction, such that the propagation of photon pairs is dominated by a two-photon bound state.

    • Ofer Firstenberg
    • , Thibault Peyronel
    •  & Vladan Vuletić

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