Featured
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Review Article |
Quantum computation and quantum simulation with ultracold molecules
The study of quantum systems in a programmable and controllable fashion is one of the aims of both quantum simulation and computing. This Review covers the prospects and opportunities that ultracold molecules offer in these fields.
- Simon L. Cornish
- , Michael R. Tarbutt
- & Kaden R. A. Hazzard
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Review Article |
Quantum sensing and metrology for fundamental physics with molecules
Ultracold atoms are a well-established platform for quantum sensing and metrology. This Review discusses the enhanced sensing capabilities that molecules offer for a range of phenomena, including symmetry-violating forces and dark matter detection.
- David DeMille
- , Nicholas R. Hutzler
- & Tanya Zelevinsky
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Review Article |
Cold trapped molecular ions and hybrid platforms for ions and neutral particles
Molecular ions and hybrid platforms that integrate cold trapped ions and neutral particles offer opportunities for many quantum technologies. This Review surveys recent methodological advances and highlights in the study of cold molecular ions.
- Markus Deiß
- , Stefan Willitsch
- & Johannes Hecker Denschlag
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Review Article |
Quantum state manipulation and cooling of ultracold molecules
Cold and ultracold molecules have emerged in the past two decades as a central topic in quantum gas studies. This Review charts the recent advances in cooling and quantum state control techniques that are shaping this evolving field.
- Tim Langen
- , Giacomo Valtolina
- & Jun Ye
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Review Article |
Ultracold chemistry as a testbed for few-body physics
Ultracold molecules and ion–neutral systems offer unique access to chemistry in a coherent quantum regime. This Review charts the progress of studies of quantum chemistry in such platforms, highlighting the synergy between theory and experiments.
- Tijs Karman
- , Michał Tomza
- & Jesús Pérez-Ríos
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Article |
Bending rigidity, sound propagation and ripples in flat graphene
The mechanism by which two-dimensional materials remain stable at a finite temperature is still under debate. Now, numerical calculations suggest that rotational symmetry is crucial in suppressing anharmonic effects that lead to structural instability.
- Unai Aseginolaza
- , Josu Diego
- & Ion Errea
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Article |
Active hole formation in epithelioid tissues
Active cell contraction drives hole nucleation, fracture and crack propagation in a tissue monolayer through a process reminiscent of dewetting thin films.
- Jian-Qing Lv
- , Peng-Cheng Chen
- & Bo Li
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Article |
Quantum spherical codes
Many recent experiments have stored quantum information in bosonic modes, such as photons in resonators or optical fibres. Now an adaptation of the classical spherical codes provides a framework for designing quantum error correcting codes for these platforms.
- Shubham P. Jain
- , Joseph T. Iosue
- & Victor V. Albert
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News & Views |
Across dimensions
The properties of quantum matter arise from the combined effects of dimensionality, interactions and quantum statistics. An experiment now studies what happens to ultracold bosons when the dimensionality of the system changes continuously between one and two dimensions.
- Jérôme Beugnon
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News & Views |
Bacteria spiral into control
Spiral waves of cell density can form and propagate through bacterial biofilms. These waves are formed by a self-organization process that coordinates pulling forces between neighbouring cells.
- Guram Gogia
- & David R. Johnson
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News & Views |
Elastic response reveals the pairing symmetry
The determination of the order parameter symmetry is a critical issue in the study of unconventional superconductors. Ultrasound measurements on UTe2, a candidate spin-triplet superconductor, now provide evidence for the single-component nature of its order parameter.
- Bohm-Jung Yang
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Article
| Open AccessLaser-driven high-energy proton beams from cascaded acceleration regimes
Laser-driven proton acceleration experiments achieve energies of up to 150 MeV with particle yields that are relevant for applications such as radiobiology.
- Tim Ziegler
- , Ilja Göthel
- & Karl Zeil
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Article
| Open AccessPolarity-driven three-dimensional spontaneous rotation of a cell doublet
Cells can form a rotating doublet. This rotation is driven by the symmetry breaking of myosin polarization in the cortices of the two cells.
- Linjie Lu
- , Tristan Guyomar
- & Guillaume Salbreux
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Article
| Open AccessStructural anisotropy results in mechano-directional transport of proteins across nuclear pores
Protein transport across the nuclear membrane is regulated by the nuclear pore complex. Experiments now show that the rates of nuclear transport rely on the presence of locally mechanically soft regions of the transported proteins.
- Fani Panagaki
- , Rafael Tapia-Rojo
- & Sergi Garcia-Manyes
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Research Briefing |
Mechanical asymmetry in nucleocytoplasmic protein transport
The nuclear pore complex of eukaryotic cells senses the mechanical directionality of translocating proteins, favouring the passage of those that have a leading mechanically labile region. Adding an unstructured, mechanically weak peptide tag to a translocating protein increases its rate of nuclear import and accumulation, suggesting a biotechnological strategy to enhance the delivery of molecular cargos into the cell nucleus.
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Article |
Spectral evidence for Dirac spinons in a kagome lattice antiferromagnet
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
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Article |
Strong tunable coupling between two distant superconducting spin qubits
The hybrid architecture of Andreev spin qubits made using semiconductor–superconductor nanowires means that supercurrents can be used to inductively couple qubits over long distances.
- Marta Pita-Vidal
- , Jaap J. Wesdorp
- & Christian Kraglund Andersen
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Article
| Open AccessAnisotropic exchange interaction of two hole-spin qubits
A successful silicon spin qubit design should be rapidly scalable by benefiting from industrial transistor technology. This investigation of exchange interactions between two FinFET qubits provides a guide to implementing two-qubit gates for hole spins.
- Simon Geyer
- , Bence Hetényi
- & Andreas V. Kuhlmann
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Research Briefing |
Mass difference measurements help to determine the neutrino mass
The Q-value of electron capture in 163Ho has been determined with an uncertainty of 0.6 eV c–2 through a combination of high-precision Penning-trap mass spectrometry and precise atomic physics calculations. This high-precision measurement provides insight into systematic errors in neutrino mass measurements.
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Research Briefing |
Enhanced generation of magnonic frequency combs
As counterparts to optical frequency combs, magnonic frequency combs could have broad applications if their initiation thresholds were low and the ‘teeth’ of the comb plentiful. Progress has now been made through exploiting so-called exceptional points to enhance the nonlinear coupling between magnons and produce wider magnonic frequency combs.
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Research Briefing |
A compact neutral-atom fault-tolerant quantum computer based on new quantum codes
A practical and hardware-efficient blueprint for fault-tolerant quantum computing has been developed, using quantum low-density-parity-check codes and reconfigurable neutral-atom arrays. The scheme requires ten times fewer qubits and paves the way towards large-scale quantum computing using existing experimental technologies.
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Article |
Enhancement of magnonic frequency combs by exceptional points
Frequency combs, which are important for applications in precision spectroscopy, depend on material nonlinearities for their function, which can be hard to engineer. Now an approach combining magnons and exceptional points is shown to be effective.
- Congyi Wang
- , Jinwei Rao
- & Wei Lu
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Article |
Constant-overhead fault-tolerant quantum computation with reconfigurable atom arrays
Quantum low-density parity-check codes are highly efficient in principle but challenging to implement in practice. This proposal shows that these codes could be implemented in the near term using recently demonstrated neutral-atom arrays.
- Qian Xu
- , J. Pablo Bonilla Ataides
- & Hengyun Zhou
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Article |
Estimates of the reproduction ratio from epidemic surveillance may be biased in spatially structured populations
Spatial dynamics can obscure epidemic trends from surveillance data, biasing reproduction ratio estimates over long periods. A spectral correction reweights incidence data to remove this bias, thus improving monitoring to inform response strategies.
- Piero Birello
- , Michele Re Fiorentin
- & Eugenio Valdano
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Article
| Open AccessIrreversible entropy transport enhanced by fermionic superfluidity
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
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Article |
Spin Berry curvature-enhanced orbital Zeeman effect in a kagome metal
Controlling orbital magnetic moments for applications can be difficult. Now local probes of a kagome material, TbV6Sn6, demonstrate how the spin Berry curvature can produce a large orbital Zeeman effect that can be tuned with a magnetic field.
- Hong Li
- , Siyu Cheng
- & Ilija Zeljkovic
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Article |
Room-temperature flexible manipulation of the quantum-metric structure in a topological chiral antiferromagnet
Manipulation of the quantum-metric structure to produce topological phenomena has rarely been studied. Now, flexible control of the quantum-metric structure is demonstrated in a topological chiral antiferromagnet at room temperature.
- Jiahao Han
- , Tomohiro Uchimura
- & Shunsuke Fukami
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Article
| Open AccessPenning-trap measurement of the Q value of electron capture in 163Ho for the determination of the electron neutrino mass
Electron capture in 163Ho can be used to determine the electron neutrino mass. The Q value of this process is crucial for the evaluation of the systematic uncertainty in such a measurement, and a 50-fold improvement is now reported.
- Christoph Schweiger
- , Martin Braß
- & Klaus Blaum
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Measure for Measure |
Slightly out of tune
Bart Verberck uses the musical cent as a pretext to touch on some of the intricacies of musical tuning systems.
- Bart Verberck
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Article |
Distinct elastic properties and their origins in glasses and gels
As amorphous solids, glasses and gels are similar, but the origins of their different elastic properties are unclear. Simulations now suggest differing free-energy-minimizing pathways: structural ordering for glasses and interface reduction for gels.
- Yinqiao Wang
- , Michio Tateno
- & Hajime Tanaka
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News & Views |
Search for rule-breaking electrons
Questioning the validity of axioms can teach us about physics beyond the standard model. A recent search for the violation of charge conservation and the Pauli exclusion principle yields limits on these scenarios.
- Alessio Porcelli
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Article
| Open AccessNonlinearity-induced topological phase transition characterized by the nonlinear Chern number
Linear topological systems can be characterized using invariants such as the Chern number. This concept can be extended to the nonlinear regime, giving rise to nonlinearity-induced topological phase transitions.
- Kazuki Sone
- , Motohiko Ezawa
- & Takahiro Sagawa
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Article |
Search for charge non-conservation and Pauli exclusion principle violation with the Majorana Demonstrator
The Majorana Demonstrator experiment reports searches for the violation of the Pauli exclusion principle and of charge conservation. In the absence of a signal, exclusion limits for these processes are reported.
- I. J. Arnquist
- , F. T. Avignone III
- & B. X. Zhu
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Article |
All-optical seeding of a light-induced phase transition with correlated disorder
Controlling phase transitions in solids is crucial for many applications. Ultrafast laser pulses have now been shown to enable the energy-efficient generation of structural fluctuations in VO2 by harnessing the correlated disorder in the material.
- Allan S. Johnson
- , Ernest Pastor
- & Simon E. Wall
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Comment |
A call for responsible quantum technology
The time has come to consider appropriate guardrails to ensure quantum technology benefits humanity and the planet. With quantum development still in flux, the science community shares a responsibility in defining principles and practices.
- Urs Gasser
- , Eline De Jong
- & Mauritz Kop
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Article |
Multiphoton electron emission with non-classical light
Photoemission experiments demonstrate that the photon number statistics of the exciting light can be imprinted on the emitted electrons, allowing the controlled generation of classical or non-classical electron number statistics of free electrons.
- Jonas Heimerl
- , Alexander Mikhaylov
- & Peter Hommelhoff
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Article |
Observation of the 2D–1D crossover in strongly interacting ultracold bosons
Quantum systems exhibit vastly different properties depending on their dimensionality. An experimental study with ultracold bosons now tracks quantum correlation properties during the crossover from two dimensions to one dimension.
- Yanliang Guo
- , Hepeng Yao
- & Hanns-Christoph Nägerl
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Perspective |
Discrete nonlinear topological photonics
Although topological photonics has been an active field of research for some time, most studies still focus on the linear optical regime. This Perspective summarizes recent investigations into the nonlinear properties of discrete topological photonic systems.
- Alexander Szameit
- & Mikael C. Rechtsman
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News & Views |
At the breaking point
The shape and trajectory of a crack plays a crucial role in material fracture. High-precision experiments now directly capture this phenomenon, unveiling the intricate 3D nature of cracks.
- Michael D. Bartlett
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Article
| Open AccessLeggett modes in a Dirac semimetal
Leggett modes can occur when superconductivity arises in more than one band in a material and represent oscillation of the relative phases of the two superconducting condensates. Now, this mode is observed in Cd3As2, a Dirac semimetal.
- Joseph J. Cuozzo
- , W. Yu
- & Enrico Rossi
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Article |
Emergence of large-scale mechanical spiral waves in bacterial living matter
The occurrence of propagating spiral waves in multicellular organisms is associated with key biological functions. Now this type of wave has also been observed in dense bacterial populations, probably resulting from non-reciprocal cell–cell interactions.
- Shiqi Liu
- , Ye Li
- & Yilin Wu
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Article |
Topological Kerr effects in two-dimensional magnets with broken inversion symmetry
The ferromagnet CrVI6 serves as a material platform to demonstrate the topological Kerr effect in two-dimensional magnets. This can be used to identify skyrmions by magneto-optical means.
- Xiaoyin Li
- , Caixing Liu
- & Zhenyu Zhang
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Article
| Open AccessMagnetically tunable supercurrent in dilute magnetic topological insulator-based Josephson junctions
Despite their potential device applications, experimental realizations of proximity-induced Fulde–Ferrell–Larkin–Ovchinnikov states are rare. Now Josephson junctions based on a dilute magnetic topological insulator provide evidence of such a state.
- Pankaj Mandal
- , Soumi Mondal
- & Laurens W. Molenkamp
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Article |
Multistep topological transitions among meron and skyrmion crystals in a centrosymmetric magnet
Topological magnetic spin structures such as skyrmions and merons have the potential to be used in magnetic information devices. Now multistep transformations between such structures are demonstrated in a centrosymmetric material.
- H. Yoshimochi
- , R. Takagi
- & S. Seki
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Article |
Connecting shear flow and vortex array instabilities in annular atomic superfluids
Two adjacent layers flowing at different velocities in the same fluid are subject to flow instabilities. This phenomenon is now studied in atomic superfluids, revealing that quantized vortices act as both sources and probes of the unstable flow.
- D. Hernández-Rajkov
- , N. Grani
- & G. Roati
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Article |
Search for decoherence from quantum gravity with atmospheric neutrinos
Interactions of atmospheric neutrinos with quantum-gravity-induced fluctuations of the metric of spacetime would lead to decoherence. The IceCube Collaboration constrains such interactions with atmospheric neutrinos.
- R. Abbasi
- , M. Ackermann
- & M. Zimmerman
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