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Volume 18 Issue 5, May 2022

Dark state control

Dark states of quantum systems do not absorb or emit light, removing a major source of decoherence. Four superconducting qubits in a waveguide can be combined to make a coherently controlled dark-state qubit with a long lifetime.

See Zanner et al. and Masson and Asenjo-Garcia

Image: Mathieu Juan, Université de Sherbrooke and Institut quantique. Cover Design: Amie Fernandez

Volume 18 Issue 5

Editorial

  • Progress in research would be impossible without state-of-the art instruments, but their contributions are often underappreciated.

    Editorial

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  • As conventions in scholarly publishing evolve, it is appropriate to reassess the options that we provide to our authors. In this spirit, Nature Physics will soon stop accepting submissions in our Letter format.

    Editorial
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Correspondence

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Thesis

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Books & Arts

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News & Views

  • The transition from chemistry to evolvable molecular systems is at the core of origins of life studies. Now, the acidic dew–liquid water dynamic cycling inside simulated Hadean rock pores is found to possibly provide a confined environment for strand separation, replication, mutation, and the evolution of nucleic acids.

    • Sudha Rajamani
    • Elisa Biondi
    News & Views
  • Theoretical physicists studying black holes have produced a conjecture that random quantum circuits cannot be simplified. Now, a minimal version of this conjecture has been proven, reaching a milestone in quantum-circuit complexity theory.

    • Lorenzo Piroli
    News & Views
  • Biomolecular condensates grow in busy cellular environments. Statistical image analysis of heterogeneous structures now enables quantification of macromolecular interactions between condensates and cytoskeletal filaments.

    • Tina Wiegand
    • Arjun Narayanan
    News & Views
  • Circular Rydberg states provide an ideal resource for large-scale quantum computing and simulation. These circular states can be controlled using coherent optical pulses, providing a route to programmable quantum hardware.

    • Jonathan Pritchard
    News & Views
  • Noble gas nuclear spins can store quantum information for hours but are hard to control. Creating a large coherent coupling to an alkali vapour gives a route to manipulating the collective nuclear spin of a helium-3 gas.

    • Alice Sinatra
    News & Views
  • An experimental realization of an artificial spin glass is demonstrated, with an arrangement of Ising-type permalloy nanomagnets mimicking the structure of artificial spin ice — and a particular type of neural network.

    • Denys Makarov
    News & Views
  • Photon emission is a major source of decoherence for several quantum technologies. Four superconducting qubits have been combined to create a ‘dark state’ qubit with strongly suppressed photon emission due to collective interference effects.

    • Stuart J. Masson
    • Ana Asenjo-Garcia
    News & Views
  • Plasmodium sporozoites can move in rotating vortices owing to their chiral shape and mechanical flexibility, revealing important physical aspects of collective motion.

    • Iva M. Tolić
    • Isabelle Tardieux
    News & Views
  • Controlling chemistry at the single-collision level is one of the main goals of experiments at ultralow temperatures. A method based on quantum logic techniques has now been shown to detect inelastic collisions in a hybrid ion–atom platform.

    • Michał Tomza
    News & Views
  • Nonlinear optical effects enable sophisticated functionalities to generate and manipulate light. The precise control of two distinct nonlinear phenomena in a photonic chip can enhance a key optical nonlinearity that makes single-photon sources more efficient.

    • Thiago P. Mayer Alegre
    • Gustavo S. Wiederhecker
    News & Views
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Letters

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Articles

  • The dynamics of quantum states underlies the emergence of thermodynamics and even recent theories of quantum gravity. Now it has been proven that the quantum complexity of states evolving under random operations grows linearly in time.

    • Jonas Haferkamp
    • Philippe Faist
    • Nicole Yunger Halpern
    Article Open Access
  • The study of single-atom collisions in ultracold gases has so far been limited to certain atomic and molecular species. A more general scheme based on quantum logic techniques has now been realized in a hybrid cold ion–atom platform.

    • Or Katz
    • Meirav Pinkas
    • Roee Ozeri
    Article
  • The charge transport mechanism in MXenes—an emerging class of layered materials—is not yet fully understood. A combination of terahertz spectroscopy and transport measurements shows that the formation of large polarons play a crucial role.

    • Wenhao Zheng
    • Boya Sun
    • Mischa Bonn
    Article Open Access
  • Whether and when a material deforms elastically or plastically depends on its microstructure. Experiments on two-dimensional colloidal systems show that in disordered materials, packing density, stress and a microstructure-related entropy govern deformations.

    • K. L. Galloway
    • E. G. Teich
    • P. E. Arratia
    Article
  • Many organelles in the cell are not encapsulated in a membrane—they are liquid-like domains formed through phase separation. The liquid-like nature of such domains leads to adhesive interactions between the cytoskeleton filaments and organelles.

    • Thomas J. Böddeker
    • Kathryn A. Rosowski
    • Eric R. Dufresne
    Article Open Access
  • Detailed microfluidics experiments and numerical simulations are used to analyse the role played by dew in the origin of life, and demonstrate that it can drive the first stages of Darwinian evolution for DNA and RNA.

    • Alan Ianeselli
    • Miguel Atienza
    • Dieter Braun
    Article Open Access
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Amendments & Corrections

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Measure for Measure

  • Juris Meija takes a look at the tumultuous past of the atomic unit of mass from its beginnings as an idea to its most recent revisions in a hotel bar.

    • Juris Meija
    Measure for Measure
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