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Article 
Quantum cascade of correlated phases in trigonally warped bilayer graphene
A cascade of gatetunable correlated insulating and metallic phases is observed in trigonally warped Bernal bilayer graphene at large electric fields.
 Anna M. Seiler
 , Fabian R. Geisenhof
 & R. Thomas Weitz

Article
 Open AccessExperimental demonstration of optical stochastic cooling
Stochastic cooling at optical frequencies is demonstrated in an experiment at the Fermi National Accelerator Laboratory’s Integrable Optics Test Accelerator, substantially increasing the bandwidth of stochastic cooling compared with conventional systems.
 J. Jarvis
 , V. Lebedev
 & A. Valishev

Article 
Realizing a 1D topological gauge theory in an optically dressed BEC
An optically coupled Bose–Einstein condensate of potassium atoms is used to engineer chiral interactions and perform the quantum simulation of a onedimensional reduction of the topological Chern–Simons gauge theory.
 Anika Frölian
 , Craig S. Chisholm
 & Leticia Tarruell

Article 
Diverse Tsunamigenesis Triggered by the Hunga TongaHunga Ha’apai Eruption
 Patrick Lynett
 , Maile McCann
 & Gizem Ezgi Cinar

Article 
NonHermitian morphing of topological modes
It is experimentally demonstrated that the nonHermitian skin effect can convert localized topological modes into extended modes of unconventional shapes while preserving the topological characteristics, which presents opportunities for topological manipulations of waves and light.
 Wei Wang
 , Xulong Wang
 & Guancong Ma

Article
 Open AccessEvaporation of microwaveshielded polar molecules to quantum degeneracy
A general and efficient approach to evaporatively cool ultracold polar molecules through elastic collisions to create a degenerate quantum gas in three dimensions is demonstrated using microwave shielding.
 Andreas Schindewolf
 , Roman Bause
 & XinYu Luo

Article 
Experimental quantum key distribution certified by Bell's theorem
This study demonstrates the experimental realization of a complete protocol for quantum key distribution using entangled trapped strontium ions with deviceindependent quantum security guarantees.
 D. P. Nadlinger
 , P. Drmota
 & J.D. Bancal

Perspective 
Practical quantum advantage in quantum simulation
The current status and future perspectives for quantum simulation are overviewed, and the potential for practical quantum computational advantage is analysed by comparing classical numerical methods with analogue and digital quantum simulators.
 Andrew J. Daley
 , Immanuel Bloch
 & Peter Zoller

Article 
Exceptionalpointbased accelerometers with enhanced signaltonoise ratio
Experiments and theory show that transmission peak degeneracies near exceptional points in an electromechanical accelerometer can be used to improve the signaltonoise ratio of the sensor.
 Rodion Kononchuk
 , Jizhe Cai
 & Tsampikos Kottos

Article 
Magnetic memory and spontaneous vortices in a van der Waals superconductor
An alternating stack of a candidate spin liquid and a superconductor shows a spontaneous vortex phase in the superconducting state without magnetism in the normal state. This indicates the presence of unconventional magnetic ordering independent of the superconductor.
 Eylon Persky
 , Anders V. Bjørlig
 & Beena Kalisky

Article
 Open AccessA deviceindependent quantum key distribution system for distant users
A system based on trapped rubidium atoms for generating quantum secure keys between distant users is presented, which could operate in a deviceindependent fashion.
 Wei Zhang
 , Tim van Leent
 & Harald Weinfurter

Article 
Quantized current steps due to the a.c. coherent quantum phaseslip effect
Direct observation of the physical dual a.c. Josephson effect, a series of quantized current steps in a superconducting nanowire, is reported and may offer a way to establish new metrological standards for currents.
 Rais S. Shaikhaidarov
 , Kyung Ho Kim
 & Oleg V. Astafiev

Article
 Open AccessDigital quantum simulation of Floquet symmetryprotected topological phases
Signatures of nonequilibrium Floquet SPT phases with a programmable superconducting quantum processor are observed in which the discrete time translational symmetry only breaks at the boundaries and not in the bulk.
 Xu Zhang
 , Wenjie Jiang
 & H. Wang

Article 
Dynamical topological phase realized in a trappedion quantum simulator
A dynamical topological phase with edge qubits that are dynamically protected from control errors, crosstalk and stray fields, is demonstrated in a quasiperiodically driven array of ten ^{171}Yb^{+} hyperfine qubits in a model trappedion quantum processor.
 Philipp T. Dumitrescu
 , Justin G. Bohnet
 & Andrew C. Potter

Article 
Perpendicular full switching of chiral antiferromagnetic order by current
Full, perpendicular and bidirectional spin–orbit torque switching of chiral antiferromagnetic order using an electrical current is experimentally demonstrated with epitaxial heterostructures.
 Tomoya Higo
 , Kouta Kondou
 & Satoru Nakatsuji

Article 
Extended farultraviolet emission in distant dwarf galaxies
Observations by the UltraViolet Imaging Telescope on AstroSat reveal ten blue compact dwarf galaxies with excess farultraviolet emission in their outer region, indicating star formation in accreting disks.
 Anshuman Borgohain
 , Kanak Saha
 & Shyam N. Tandon

Article
 Open AccessA DNA origami rotary ratchet motor
A nanoscale rotary motor made of DNA origami, driven by ratcheting and powered by an external electric field, shows the ability to wind up a spring and has mechanical capabilities approaching those of biological motors.
 AnnaKatharina Pumm
 , Wouter Engelen
 & Hendrik Dietz

Article 
Optical observation of single spins in silicon
Individually addressable ‘T centre’ photonspin qubits are integrated in silicon photonic structures and their spindependent telecommunicationsband optical transitions characterized, creating opportunities to construct siliconintegrated, telecommunicationsband quantum information networks.
 Daniel B. Higginbottom
 , Alexander T. K. Kurkjian
 & Stephanie Simmons

Article 
Measuring the knot of nonHermitian degeneracies and noncommuting braids
Control loops generically produce braids of eigenfrequencies, and these braids form a nonAbelian group that reflects the nontrivial geometry of the space of degeneracies; these features are demonstrated experimentally using a cavity optomechanical system.
 Yogesh S. S. Patil
 , Judith Höller
 & Jack G. E. Harris

Article 
Nuclear moments of indium isotopes reveal abrupt change at magic number 82
Precision laser spectroscopy measurements of neutronrich indium isotopes were performed to investigate the validity and identify limitations of theoretical descriptions of nuclei based on simple singleparticle approaches.
 A. R. Vernon
 , R. F. Garcia Ruiz
 & D. T. Yordanov

Article 
Odd dynamics of living chiral crystals
Experiments show that swimming starfish embryos spontaneously assemble into large chiral crystals that exhibit selfsustained chiral oscillations and unconventional deformation responses characteristic of odd elastic materials.
 Tzer Han Tan
 , Alexander Mietke
 & Nikta Fakhri

Article
 Open AccessElastocaloric determination of the phase diagram of Sr_{2}RuO_{4}
The phase diagram of the unconventional superconductor Sr_{2}RuO_{4} in both normal and superconducting states is mapped out using highprecision measurements of the elastocaloric effect, showing similarities to other unconventional superconductors as well as unique features.
 YouSheng Li
 , Markus Garst
 & Andrew P. Mackenzie

Article 
Attosecond spectroscopy of sizeresolved water clusters
Attosecond sizeresolved 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 
Direct observation of vortices in an electron fluid
Vortices in an electron fluid are directly observed in a parahydrodynamic regime in which the spatial diffusion of electron momenta is enabled by smallangle scattering rather than electron–electron scattering.
 A. AharonSteinberg
 , T. Völkl
 & E. Zeldov

Article
 Open AccessCoherent interfaces govern direct transformation from graphite to diamond
The discovery of graphite–diamond hybrid carbon, Gradia, which consists of graphite and diamond nanodomains interlocked through coherent interfaces, clarifies the longstanding mystery of how graphite turns into diamond.
 Kun Luo
 , Bing Liu
 & Yongjun Tian

Article
 Open AccessEntangling single atoms over 33 km telecom fibre
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 largescale quantum network links.
 Tim van Leent
 , Matthias Bock
 & Harald Weinfurter

Article 
Topologically protected magnetoelectric switching in a multiferroic
The electric polarization of a multiferroic is reversed by the application and subsequent removal of a magnetic field, resulting in topologically protected unidirectional magnetoelectric switching.
 Louis Ponet
 , S. Artyukhin
 & Andrei Pimenov

Perspective 
The Higgs boson turns ten
Ten years since the discovery of the Higgs boson, the exploration of the Higgs sector, as this overview shows, has progressed far beyond original expectations, but many research questions still remain open.
 Gavin P. Salam
 , LianTao Wang
 & Giulia Zanderighi

Article
 Open AccessA detailed map of Higgs boson interactions by the ATLAS experiment ten years after the discovery
Ten years after the discovery of the Higgs boson, the ATLAS experiment at CERN probes its kinematic properties with a significantly larger dataset from 2015–2018 and provides further insights on its interaction with other known particles.

Article
 Open AccessA portrait of the Higgs boson by the CMS experiment ten years after the discovery
The most uptodate combination of results on the properties of the Higgs boson is reported, which indicate that its properties are consistent with the standard model predictions, within the precision achieved to date.

Article 
Scalable singlemode surface emitting laser via openDirac singularities
 Rushin Contractor
 , Wanwoo Noh
 & Boubacar Kanté

Article
 Open AccessManybody theory of positron binding to polyatomic molecules
A manybody theory of binding interactions between positrons and polar and nonpolar molecules is developed, showing agreement with experimental data up to within 1%.
 Jaroslav Hofierka
 , Brian Cunningham
 & Dermot G. Green

Article
 Open AccessEngineering topological states in atombased semiconductor quantum dots
Precisionengineered devices consisting of a linear array of ten quantum dots are used to realize both the trivial and topological phases of the manybody Su–Schrieffer–Heeger model.
 M. Kiczynski
 , S. K. Gorman
 & M. Y. Simmons

Article
 Open AccessObservation of a correlated free fourneutron system
Experiment based on knocking out an alpha particle from a highenergy helium isotope shows a resonancelike structure that is consistent with a quasibound tetraneutron state existing for a very short time.
 M. Duer
 , T. Aumann
 & M. V. Zhukov

Article
 Open AccessOrganic bipolar transistors
An organic bipolar junction transistor composed of highly crystalline rubrene thin films has a device architecture that could be used in organic electronics with greatly improved highfrequency performance
 ShuJen Wang
 , Michael Sawatzki
 & Karl Leo

Article 
Evidence for unconventional superconductivity in twisted trilayer graphene
Highresolution scanning tunnelling microscopy and spectroscopy are used to provide evidence for unconventional superconductivity in magicangle twisted trilayer graphene.
 Hyunjin Kim
 , Youngjoon Choi
 & Stevan NadjPerge

Article 
Superconductingqubit readout via lowbackaction electrooptic transduction
Readout of a superconducting qubit embedded in a circuit quantum electrodynamics architecture is demonstrated at optical frequencies through a lownoise electrooptomechanical transducer.
 R. D. Delaney
 , M. D. Urmey
 & K. W. Lehnert

Article
 Open AccessMeasurement of the boundelectron gfactor difference in coupled ions
By trapping and crystallizing two highly charged ions of different neon isotopes in the same potential, a highprecision measurement of the boundelectron gfactor difference is obtained.
 Tim Sailer
 , Vincent Debierre
 & Sven Sturm

Article 
Observation of Cooper pairs in a mesoscopic twodimensional Fermi gas
Precise control over the quantum state of a twodimensional Fermi gas together with singleparticleresolved fluorescence imaging enables the direct observation of the formation of Cooper pairs at the Fermi surface.
 Marvin Holten
 , Luca Bayha
 & Selim Jochim

Article
 Open AccessContinuous Bose–Einstein condensation
Continuous, indefinitely lasting Bose–Einstein condensation, sustained by amplification through Bosestimulated gain of atoms from a thermal bath, creates a continuouswave condensate of strontium atoms.
 ChunChia Chen
 , Rodrigo González Escudero
 & Florian Schreck

Article
 Open AccessConstraining neutronstar matter with microscopic and macroscopic collisions
The physics of dense matter extracted from neutron star collision data is demonstrated to be consistent with information obtained from heavyion collisions, and analyses incorporating both data sources as well as information from nuclear theory provide new constraints for neutron star matter.
 Sabrina Huth
 , Peter T. H. Pang
 & Chris Van Den Broeck

Article
 Open AccessNanoscale imaging of phonon dynamics by electron microscopy
A method for mapping phonon momenta reveals nonequilibrium phonon dynamics at nanoscale interfaces enabling study of actual nanodevices and aiding understanding of heat dissipation near nanoscale hotspots.
 Chaitanya A. Gadre
 , Xingxu Yan
 & Xiaoqing Pan

Article
 Open AccessDirect measurement of the ^{3}He^{+} magnetic moments
Measuring the hyperfine structure of a single helium3 ion in a Penning trap enables direct measurement of the nuclear magnetic moment of helium3 and provides the high accuracy needed for NMRbased magnetometry.
 A. Schneider
 , B. Sikora
 & K. Blaum

Article 
Ordered and tunable Majoranazeromode lattice in naturally strained LiFeAs
An ordered Majoranazeromode lattice in naturally strained LiFeAs is reported, formed by vortices pinned to charge density wave stripes, and with density and geometry tunable by application of an external magnetic field.
 Meng Li
 , Geng Li
 & HongJun Gao

Article
 Open AccessQuantum computational advantage with a programmable photonic processor
Gaussian boson sampling is performed on 216 squeezed modes entangled with threedimensional connectivity^{5}, using Borealis, registering events with up to 219 photons and a mean photon number of 125.
 Lars S. Madsen
 , Fabian Laudenbach
 & Jonathan Lavoie

Article
 Open AccessProbing CP symmetry and weak phases with entangled doublestrange baryons
Using spinentangled baryon–antibaryon pairs, the BESIII Collaboration reports on highprecision measurements of potential charge conjugation and parity (CP)symmetryviolating effects in hadrons.
 M. Ablikim
 , M. N. Achasov
 & J. H. Zou

Article
 Open AccessRealizing the symmetryprotected Haldane phase in Fermi–Hubbard ladders
A ladderlike arrangement of an ultracold gas of lithium atoms trapped in an optical lattice enables the observation of a symmetryprotected topological phase.
 Pimonpan Sompet
 , Sarah Hirthe
 & Immanuel Bloch

Article 
NonHermitian chiral phononics through optomechanically induced squeezing
Timereversal symmetry breaking is combined with nonHermitian dynamics in an optomechanical system with squeezing interactions to produce chirality in the system, and a nonHermitian Aharonov–Bohm effect is observed.
 Javier del Pino
 , Jesse J. Slim
 & Ewold Verhagen
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