Quantum fluids and solids articles within Nature Physics

Featured

  • Article |

    A Dirac quantum spin liquid phase is predicted to have a continuum of fractionalized spinon excitations with a Dirac cone dispersion. A spin continuum consistent with this picture has now been observed in neutron scattering measurements.

    • Zhenyuan Zeng
    • , Chengkang Zhou
    •  & Shiliang Li

  • Article
    | Open Access

    Connecting two superfluid reservoirs leads to both particle and entropy flow between the systems. Now, a direct measurement of the entropy current and production in ultracold quantum gases reveals how superfluidity enhances entropy transport.

    • Philipp Fabritius
    • , Jeffrey Mohan
    •  & Tilman Esslinger

  • News & Views |

    Phonons do not carry spin or charge, but they can couple to an external magnetic field and cause a sizable transverse thermal gradient. Experiments suggest that phonon handedness is a widespread effect in magnetic insulators with impurities.

    • Valentina Martelli

  • Article |

    Bound states in the continuum are topological states with useful symmetry protection properties. An experiment now shows how to use them to form macroscopically coherent complexes of polariton condensates.

    • Antonio Gianfrate
    • , Helgi Sigurðsson
    •  & Daniele Sanvitto

  • Research Briefing |

    Neutron spectroscopy, entanglement analysis, and simulations provide evidence that KYbSe2 closely approximates a 2D quantum spin liquid. Although KYbSe2 displays magnetic ordering at low temperatures, its magnetic dynamics are dominated by fractionalized excitations that exhibit anomalously large quantum entanglement, indicating that on finite timescales KYbSe2 exhibits quantum spin liquid physics.

  • Article |

    It is very challenging to model hydrogen at high pressures and low temperatures because quantum effects become significant. A state-of-the-art numerical study shows that these effects cause important changes to the predicted phase diagram.

    • Lorenzo Monacelli
    • , Michele Casula
    •  & Francesco Mauri

  • Article
    | Open Access

    Quantum turbulence typically entails reconnecting quantized vortices as seen in quantum fluids. Experiments with superfluid helium now show turbulent dynamics with negligible vortex reconnection, a regime dominated by interacting vortex waves at all length scales.

    • J. T. Mäkinen
    • , S. Autti
    •  & V. B. Eltsov

  • News & Views |

    Despite its technological importance, there remain gaps in our understanding of silicon’s electronic behaviour, especially at low temperatures. Measurements close to a metal–insulator transition show signs of a collective many-body quantum state.

    • Mark Lee

  • Research Briefing |

    Evidence for an exotic form of the Kondo effect has been obtained by placing magnetic atoms on single-layer 1T-TaSe2, which is a quantum spin liquid candidate. Unlike conventional Kondo screening, which arises from conduction electrons in a metal, the Kondo effect in 1T-TaSe2 arises from charge-neutral particles known as spinons.

  • News & Views |

    The hydrodynamic description of many-body quantum systems is a key part of our understanding of out-of-equilibrium physics. Exotic, highly constrained quantum particles called fractons require a treatment that goes beyond hydrodynamics.

    • Olalla Castro-Alvaredo

  • Article |

    Fractons are particles that can only move in tandem, which substantially affects their thermalization. Below four spatial dimensions, an unconventional dynamical universality class can emerge as thermal fluctuations destroy hydrodynamic behaviour.

    • Paolo Glorioso
    • , Jinkang Guo
    •  & Andrew Lucas

  • Letter |

    A heterostructure supports the equilibrium bound states of an electron and hole—excitons—that strongly interact with each other. This provides a platform for the quantum simulation of bosonic lattice models.

    • Jie Gu
    • , Liguo Ma
    •  & Kin Fai Mak

  • News & Views |

    Observations of an electronic state where rotational symmetry is broken show that this could be a generic feature of moiré materials.

    • Benjamin E. Feldman

  • Article |

    Observations of an electronic nematic phase in twisted double bilayer graphene expand the number of moiré materials where this interaction-driven state exists.

    • Carmen Rubio-Verdú
    • , Simon Turkel
    •  & Abhay N. Pasupathy

  • Review Article |

    Optical box traps create a potential landscape for quantum gases that is close to the homogeneous theoretical ideal. This Review of box trapping methods highlights the breakthroughs in experimental many-body physics that have followed their development.

    • Nir Navon
    • , Robert P. Smith
    •  & Zoran Hadzibabic

  • Letter |

    When interactions between electrons in a material are strong, they can start to behave hydrodynamically. Spatially resolved imaging of current flow in a three-dimensional material suggests that electron–electron interactions are mediated by phonons.

    • Uri Vool
    • , Assaf Hamo
    •  & Amir Yacoby

  • News & Views |

    The two-fluid model of superfluids predicts a second, quantum mechanical form of sound. Ultracold atom experiments have now measured second sound in the unusual two-dimensional superfluid described by the Berezinskii–Kosterlitz–Thouless transition.

    • Sandro Stringari

  • News & Views |

    The contact formalism describes short-range correlations, which play a crucial role in nuclear systems. Initially introduced for ultracold atoms, its generalization to the nuclear case was now validated by ab initio calculations.

    • Michael Urban

  • Article |

    Scale-invariant magnetic anisotropy in RuCl3 has been revealed through measurements of its magnetotropic coefficient, providing evidence for a high degree of exchange frustration that favours the formation of a spin liquid state.

    • K. A. Modic
    • , Ross D. McDonald
    •  & Arkady Shekhter

  • Letter |

    A detailed neutron-scattering study reveals a quantum spin liquid behaviour in Ce2Sn2O7 originating from its higher-order magnetic multipolar moments acting on the geometrically frustrated pyrochlore lattice.

    • Romain Sibille
    • , Nicolas Gauthier
    •  & Tom Fennell

  • Letter |

    Light-induced deformations in a film of superfluid helium covering an optical microresonator can greatly enhance Brillouin interactions, enabling strong coupling between counter-propagating modes as well as Brillouin lasing.

    • Xin He
    • , Glen I. Harris
    •  & Warwick P. Bowen

  • Article |

    The electrons that contribute to the Mott insulator state in single-layer 1T-TaSe2 are shown to also have a rich variation in their orbital occupation. As more layers are added, both the insulating state and orbital texture weaken.

    • Yi Chen
    • , Wei Ruan
    •  & Michael F. Crommie

  • Letter |

    Quantum gas microscopes provide high-resolution real-space snapshots of quantum many-body systems. Now machine-learning techniques are used in choosing theoretical descriptions according to the consistency of their predictions with these snapshots.

    • Annabelle Bohrdt
    • , Christie S. Chiu
    •  & Michael Knap

  • Article |

    A unified theory for the conduction of heat in materials is derived and shown to account for both the limiting regimes of periodic crystals and aperiodic glasses.

    • Michele Simoncelli
    • , Nicola Marzari
    •  & Francesco Mauri

  • Letter |

    The Kondo effect—the screening of a magnetic impurity’s local moment by the electron Fermi sea in a metal—has been observed in a charge-insulating quantum spin liquid material, where the spinon excitations take the role of electrons.

    • M. Gomilšek
    • , R. Žitko
    •  & A. Zorko

  • Letter |

    This study presents a proposal for an all-optical method for manipulating chiral superconductors. Light pulses can switch the handedness of the chirality, potentially enabling controlled local writing of domain walls and associated Majorana modes.

    • M. Claassen
    • , D. M. Kennes
    •  & A. Rubio

  • News & Views |

    Applications of spintronics often require angular momentum to be moved from place to place. A possible observation of spin superfluidity may point the way toward the transport of spin angular momentum across an insulating sample with no dissipation or energy loss.

    • Joshua Folk

  • Letter |

    A detailed and systematic neutron scattering study of rare-earth pyrochlore magnet Pr2Hf2O7 provides evidence for a quantum spin ice state, and emergent lattice quantum electrodynamics consistent with theoretical predictions.

    • Romain Sibille
    • , Nicolas Gauthier
    •  & Tom Fennell

  • Letter |

    Cavity polaritons whose matter component is composed of highly excited Rydberg atoms are shown to act as a zero-dimensional quantum dot. Trapping 150 polaritons led to the observation of blockaded photon transport.

    • Ningyuan Jia
    • , Nathan Schine
    •  & Jonathan Simon

  • News & Views |

    Enabled by recent advances in symmetry and electronic structure, researchers have observed signatures of unconventional threefold degeneracies in tungsten carbide, challenging a longstanding paradigm in nodal semimetals.

    • Benjamin J. Wieder

Browse broader subjects

Browse Quantum fluids and solids across other nature.com journals