Latest Research

Filter by:

  • Artificial periodic lattices of microcavities filled with optically active materials can serve as a platform to explore a range of physical phenomena. Here, the authors prepare and analyse 2D Lieb lattices made from a tunable cavity array with an organic polymer which operates in the strong exciton–photon coupling regime and exhibits polariton condensation at room temperature.

    • Fabio Scafirimuto
    • Darius Urbonas
    • Thilo Stöferle
    Article Open Access
  • In a magnetic field, superconductivity can be induced or reinforced near a metamagnetic transition, where ferromagnetic fluctuations are suspected to mediate the pairing strength of the Cooper pairs. Here, the authors investigate the superconductor UTe2 and report on the variation in the superconducting properties as the magnetic field is applied along two particular crystallographic axes and their relation to metamagnetism.

    • W. Knafo
    • M. Nardone
    • D. Braithwaite
    Article Open Access
  • Intermediate band solar cell is a type of photovoltaic cell which includes additional narrow band states which allow absorption of low energy below-bandgap photons that might otherwise be transmitted from the host material. Here, the authors report a type of ratchet intermediate band solar cell prepared by doping GaAs with erbium and investigate the underlying energy transfer mechanisms.

    • Tomah Sogabe
    • Chao-Yu Hung
    • Yoshitaka Okada
    Article Open Access
  • The structure and processes of life’s molecules at the nanoscale are probed with optical super resolution techniques. The authors present a method that combines conventional localization information and information from structured illumination, which outperforms other methods by localizing single molecules with a theoretically optimal doubling of precision.

    • Martin Schmidt
    • Adam C. Hundahl
    • Kim I. Mortensen
    Article Open Access
  • Charge density waves are periodic modulations of the electron density which occur at low temperatures in many transition metal dichalcogenide monolayers, though the underlying mechanism is still a matter of debate. Here the authors use renormalisation group analysis to demonstrate that electron–electron interactions and Fermi surface nesting may play a prominent role in mediating the competition between the charge density-wave and superconducting states.

    • Matthew J. Trott
    • Chris A. Hooley
    Article Open Access
  • Cells are in constant movement inside tissues, but often remain cohesive nevertheless, i.e., single cells do not escape from the colony edges. Using an active Brownian-particle model with attraction, in this paper the authors develop an interaction potential that reproduces experimental observations describing the motion of epithelial sheets under different conditions.

    • Debarati Sarkar
    • Gerhard Gompper
    • Jens Elgeti
    Article Open Access
  • Gravitational wave astronomy has opened the door to test general relativity and the effect of gravity in the Universe. The authors present the capabilities of an overlap between space gravitational wave detectors LISA and Taiji to constrain the Hubble constant to 0.5%, in 10 years, and what can be learned from the satellite pilot Taiji-1 launched in 2019.

    • Yue-Liang Wu
    • Zi-Ren Luo
    • Zi-Ming Zou
    Perspective Open Access
  • The use of cold atom interferometry for applications in metrology and accurate instrumentation is hampered by optically cumbersome atom detection systems. The authors present a non-destructive microwave detection method for the quantum states of cold atoms that overcomes the need for complex optical systems and experimental set ups, making it a more portable solution for quantum and inertial sensing.

    • William Dubosclard
    • Seungjin Kim
    • Carlos L. Garrido Alzar
    Article Open Access
  • Very high energy electrons (VHEE) penetrate deeply in tissues and can provide an alternative to photon irradiation for tumour treatment. Using VHEE beams at CERN Linear Electron Accelerator for Research (CLEAR) focused into a water phantom, the authors demonstrate on-axis dose enhancement at a depth of 5–6 cm, proving that such beams can produce dose concentration to small volume elements, hence limiting the effect on adjacent healthy tissues if used for radiotherapy.

    • Karolina Kokurewicz
    • Enrico Brunetti
    • Dino Anthony Jaroszynski
    Article Open Access
  • Turbulent flows have been the subject of intensive studies, but experimental investigations are lacking due to the need for high-frequency and high-resolution methods to probe small scale structure and time evolution. The authors report high repetition rate, high spatial resolution, particle image velocimetry measurements of a turbulent, circular jet flow, revealing that the turbulent jet measured is inhomogeneous and anisotropic and demonstrating that Taylor’s frozen turbulence hypothesis fails to generalize for inhomogeneous jet flows.

    • Sukesh Roy
    • Joseph D. Miller
    • Gemunu H. Gunaratne
    Article Open Access
  • The lack of a clean charge neutral cleavage plane for the 122 family of iron-based superconductors has complicated surface-sensitive spectroscopy probes from revealing the intrinsic electronic properties of these materials. Here the authors introduce an effective surface dosing method that drastically improves the observed spectral quality, thus revealing unprecedented details of the superconducting gap anisotropy.

    • Ziming Xin
    • Yudi Wang
    • Yan Zhang
    Article Open Access
  • Graphene exhibits both extremely high electrical conductivity and electron mobility but an incomplete understanding of the underlying mechanisms so far limits potential applications in electrical devices. Here, the authors theoretically and experimentally investigate the role of charged impurities and optical phonons on the conductivity properties of graphene and establish a universal connection between the mobility and conductivity.

    • Jonathan H. Gosling
    • Oleg Makarovsky
    • T. Mark Fromhold
    Article Open Access
  • Bose-Einstein condensation was theoretically predicted almost 150 years ago but experimentally realized this century, reviving the interest in this striking quantum phenomenon. The authors present a system of strongly interacting bosons that have the ability to go from the quasi-condensation state of matter to a fully Bose-Einstein condensate, showing that this phase transition can be achieved by just tuning one parameter.

    • Mihály Máté
    • Örs Legeza
    • Christian Schilling
    Article Open Access
  • Understanding how social interactions between individuals shape the large-scale properties of social networks is key to understanding our society. Here, the authors revisit the Adjacent Possible paradigm to describe the evolution of social networks as a social space exploration process, presenting a simple model that reproduces several empirical features common to diverse real-world social networks.

    • Enrico Ubaldi
    • Raffaella Burioni
    • Francesca Tria
    Article Open Access
  • Gravitational wave astronomy is on a path to increase the sensitivity and bandwidth of their detectors to afford the possibility to study a larger variety of sources and physical processes. The authors present solutions to enhance the sensitivity of a laser interferometric gravitational wave detector in the frequency band of 1-5 kHz using optomechanics-based white light signal recycling technologies, overcoming previous limitations of signal recycling.

    • Michael A. Page
    • Maxim Goryachev
    • Chunnong Zhao
    Article Open Access
  • Magnetic monopoles are predicted by grand unified theories but remain elusive as elementary particles. Here, extending electric-magnetic symmetry onto full quantum behavior, the authors demonstrate that magnetic monopoles emerge as excitations in condensed matter systems, where they can form a quantum Bose condensate manifesting as a superinsulating state dual to superconductivity, made of charge Cooper pair condensate.

    • M. C. Diamantini
    • C. A. Trugenberger
    • V. M. Vinokur
    Article Open Access
  • In quantum physics, observables are generally believed to be Hermitian, but there are several examples of non-Hermitian systems possessing real positive eigenvalues, particularly among open systems. Here, the authors simulate the evolution of a non-Hermitian Hamiltonian on a superconducting quantum processor using a dilation procedure involving an ancillary qubit, and observe the parity–time (PT)-symmetry breaking phase transition at the exceptional points.

    • Shruti Dogra
    • Artem A. Melnikov
    • Gheorghe Sorin Paraoanu
    Article Open Access
  • A general theory for dynamical processes in higher-order systems is still missing. Here, the authors provide a general mathematical framework based on linear stability analysis that allows to assess the stability of classes of processes on arbitrary hypergraphs.

    • Guilherme Ferraz de Arruda
    • Michele Tizzani
    • Yamir Moreno
    Article Open Access
  • While 3D printing applications range from aerospace manufacturing to the design of drug delivery systems, current technologies reaching the micro and nanoscale resolution are limited by the complexity and cost of their components. Here, the authors show that nanoscale cost-effective 3D printing can be achieved by using a gaming console optical drive pickup for 3D photopolymerization.

    • Tien-Jen Chang
    • Lukas Vaut
    • En-Te Hwu
    Article Open Access
  • Optical computing holds promise for high-speed, low-energy information processing due to its large bandwidth and ability to multiplex signals. The authors propose a recurrent neural network implementation using reservoir computing architecture in an integrated photonic processor capable of performing ~10 tera multiplication–accumulation operations per second for each wavelength channel.

    • Mitsumasa Nakajima
    • Kenji Tanaka
    • Toshikazu Hashimoto
    Article Open Access