Featured
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Article |
A site-resolved two-dimensional quantum simulator with hundreds of trapped ions
In this work, stable trapping of a two-dimensional Wigner crystal of above 500 ions is achieved, and the quantum simulation of 300 ions with individual state detection demonstrated.
- S.-A. Guo
- , Y.-K. Wu
- & L.-M. Duan
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Correspondence |
Keep an open mind on faster-than-light ‘tachyons’ as the source of quantum entanglement
- Ian Crawford
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News |
‘Quantum internet’ demonstration in cities is most advanced yet
Experiments generate quantum entanglement over optical fibres across three real cities, marking progress towards networks that could have revolutionary applications.
- Davide Castelvecchi
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Article
| Open AccessEntanglement of nanophotonic quantum memory nodes in a telecom network
Entanglement of two nanophotonic quantum network nodes is demonstrated through 40 km spools of low-loss fibre and a 35-km long fibre loop deployed in the Boston area urban environment.
- C. M. Knaut
- , A. Suleymanzade
- & M. D. Lukin
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Article
| Open AccessWavefunction matching for solving quantum many-body problems
An approach called wavefunction matching transforms particle interactions so that their wavefunctions match those of easily computable interactions, to allow for calculations of quantum many-body systems that would otherwise be difficult or impossible.
- Serdar Elhatisari
- , Lukas Bovermann
- & Gianluca Stellin
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Article |
Creation of memory–memory entanglement in a metropolitan quantum network
A metropolitan-area quantum network based on the generation of pairwise entanglement is formed by three atomic quantum memories connected to a central photonic server.
- Jian-Long Liu
- , Xi-Yu Luo
- & Jian-Wei Pan
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Article
| Open AccessFusion of deterministically generated photonic graph states
Using an optical resonator containing two individually addressable atoms in a single cavity, fusion of deterministically generated photonic graph states to create ring and tree graph states with up to eight qubits is demonstrated.
- Philip Thomas
- , Leonardo Ruscio
- & Gerhard Rempe
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Article |
Observation of Nagaoka polarons in a Fermi–Hubbard quantum simulator
Emergence of Nagaoka polarons and kinetic magnetism is observed in a Hubbard system realized with strongly interacting fermions trapped in a triangular optical lattice.
- Martin Lebrat
- , Muqing Xu
- & Markus Greiner
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Article |
An atomic boson sampler
Boson sampling using ultracold atoms in a two-dimensional, tunnel-coupled optical lattice is enabled by high-fidelity programmable control with optical tweezers of a large number of atoms trapped in an optical lattice.
- Aaron W. Young
- , Shawn Geller
- & Adam M. Kaufman
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Article |
Directly imaging spin polarons in a kinetically frustrated Hubbard system
A triangular-lattice Hubbard system realized with ultracold atoms is used to directly image spin polarons, revealing ferromagnetic correlations around a charge dopant, a manifestation of the Nagaoka effect.
- Max L. Prichard
- , Benjamin M. Spar
- & Waseem S. Bakr
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Article |
Quantum control of a cat qubit with bit-flip times exceeding ten seconds
A type of qubit that has inherent resistance to bit-flip errors has been manipulated with a bit-flip time of more than 10 s without losing that error protection.
- U. Réglade
- , A. Bocquet
- & Z. Leghtas
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Research Briefing |
A quantum solid made of electrons: observing the elusive Wigner crystal
In ordinary materials, electrons move too quickly for their negative electric charges to affect their interactions. But at low temperatures and densities, they can be made to crystallize into an exotic type of electron solid — a phenomenon predicted by Eugene Wigner 90 years ago and only now directly observed.
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News & Views |
Intel brings quantum-computing microchips a step closer
By adapting methods for fabricating and testing conventional computer chips, researchers have brought silicon-based quantum computers closer to reality — and to accessing the immense benefits of a mature chipmaking industry.
- Ruoyu Li
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Article
| Open AccessProbing single electrons across 300-mm spin qubit wafers
Using a cryogenic 300-mm wafer prober, a new approach for the testing of hundreds of industry-manufactured spin qubit devices at 1.6 K provides high-volume data on performance, allowing optimization of the complementary metal–oxide–semiconductor (CMOS)-compatible fabrication process.
- Samuel Neyens
- , Otto K. Zietz
- & James S. Clarke
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Essay |
‘Shut up and calculate’: how Einstein lost the battle to explain quantum reality
By suppressing questions they considered too ‘philosophical’, post-war physicists created an unquestioning orthodoxy that influences science to this day.
- Jim Baggott
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News & Views |
Robust optical clocks promise stable timing in a portable package
A highly precise timekeeping instrument has been adapted for the real world. The compact and robust device is smaller than its commercial counterparts and performs comparably in the laboratory and aboard a naval ship.
- Bonnie L. S. Marlow
- & Jonathan Hirschauer
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Article
| Open AccessProbing entanglement in a 2D hard-core Bose–Hubbard lattice
By emulating a 2D hard-core Bose–Hubbard lattice using a controllable 4 × 4 array of superconducting qubits, volume-law entanglement scaling as well as area-law scaling at different locations in the energy spectrum are observed.
- Amir H. Karamlou
- , Ilan T. Rosen
- & William D. Oliver
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Article |
Laser spectroscopy of triply charged 229Th isomer for a nuclear clock
The trapping of triply charged 229mTh3+ is described and its nuclear decay half-life determined, showing useful properties for the development of a nuclear clock and applications in the search for new physics.
- Atsushi Yamaguchi
- , Yudai Shigekawa
- & Hidetoshi Katori
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Research Briefing |
Controlling single polyatomic molecules in an optical array for quantum applications
Applications from quantum computing to searches for physics beyond the standard model could benefit from precision control of polyatomic molecules. A method of confining and manipulating single polyatomic molecules held in tightly focused ‘optical tweezer’ laser arrays at ultracold temperatures could boost progress on all those fronts.
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Article |
An optical tweezer array of ultracold polyatomic molecules
An optical tweezer array of individual polyatomic molecules is created, revealing the obvious state control in the tweezer array and enabling further research on polyatomic molecules with diverse spatial arrangements.
- Nathaniel B. Vilas
- , Paige Robichaud
- & John M. Doyle
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Article
| Open AccessHigh-threshold and low-overhead fault-tolerant quantum memory
An end-to-end quantum error correction protocol that implements fault-tolerant memory on the basis of a family of low-density parity-check codes shows the possibility of low-overhead fault-tolerant quantum memory within the reach of near-term quantum processors.
- Sergey Bravyi
- , Andrew W. Cross
- & Theodore J. Yoder
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Article
| Open AccessHigh-fidelity spin qubit operation and algorithmic initialization above 1 K
Initialization and operation of spin qubits in silicon above 1 K reach fidelities sufficient for fault-tolerant operations at these temperatures.
- Jonathan Y. Huang
- , Rocky Y. Su
- & Chih Hwan Yang
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Article
| Open AccessBenchmarking highly entangled states on a 60-atom analogue quantum simulator
Fidelity benchmarking of an analogue quantum simulator reaches a high-entanglement regime where exact classical simulation of quantum systems becomes impractical, and enables a new method for evaluating the mixed-state entanglement of quantum devices.
- Adam L. Shaw
- , Zhuo Chen
- & Manuel Endres
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Article
| Open AccessRotating curved spacetime signatures from a giant quantum vortex
By stabilizing a stationary giant quantum vortex in superfluid 4He and introducing a minimally invasive way to characterize the vortex flow, intricate wave–vortex interactions are shown to simulate black hole ringdown physics.
- Patrik Švančara
- , Pietro Smaniotto
- & Silke Weinfurtner
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Muse |
Do black holes explode? The 50-year-old puzzle that challenges quantum physics
Stephen Hawking’s paradoxical finding that black holes don’t live forever has profound, unresolved implications for the quest for unifying theories of reality.
- Davide Castelvecchi
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Article
| Open AccessPenning micro-trap for quantum computing
A micro-fabricated Penning trap that operates at a 3 T magnetic field demonstrates full quantum control of an ion and the ability to transport the ion arbitrarily in the trapping plane above the chip.
- Shreyans Jain
- , Tobias Sägesser
- & Jonathan Home
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Research Briefing |
Measuring the quantum vibrations of a small drum at room temperature
A combination of technical improvements in noise mitigation enabled the observation of the quantum force of light on a millimetre-scale drum at room temperature. This experimental system permits the drum’s position to be measured with an accuracy close to the quantum limit.
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News & Views |
Quantum sensor settles debate about superconductivity in hydrides
By adapting a device designed to create extremely high pressures into one that can sense magnetic fields, researchers have obtained evidence that a hydrogen-rich material is a superconductor, eliminating long-standing doubts.
- Kin On Ho
- & Sen Yang
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Article |
Imaging the Meissner effect in hydride superconductors using quantum sensors
In order to explore superconductivity in hydride materials, local magnetometry inside a diamond anvil cell is performed with sub-micron spatial resolution at megabar pressures using nitrogen-vacancy colour centres.
- P. Bhattacharyya
- , W. Chen
- & N. Y. Yao
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Research Briefing |
Fractional quantum Hall effect at zero magnetic field observed in an unexpected material
The fractional quantum anomalous Hall effect occurs when the Hall resistance in a material is quantized to fractional multiples of the fundamental unit h/e2 at zero magnetic field. Observing the effect in a system consisting of a combination of five-layer graphene and hexagonal boron nitride enriches the family of topological matter phases, and opens up new opportunities in quantum computation.
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Research Briefing |
Topological matter created on a quantum chip produces quasiparticles with computing power
Non-Abelian anyons are emergent quasiparticles found in exotic quantum states of matter, which could have applications in fault-tolerant topological quantum computing. But performing the manipulations necessary to make these quasiparticles has proved a challenge — now overcome through a happy confluence of theoretical and experimental innovation.
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Article
| Open AccessRoom-temperature quantum optomechanics using an ultralow noise cavity
A room-temperature demonstration of optomechanical squeezing of light and measurement of mechanical motion approaching the Heisenberg limit using a phononic-engineered membrane-in-the-middle cavity with ultralow noise.
- Guanhao Huang
- , Alberto Beccari
- & Tobias J. Kippenberg
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Article |
Non-Abelian topological order and anyons on a trapped-ion processor
A trapped-ion quantum processor is used to create ground-states and excitations of non-Abelian topological order on a kagome lattice of 27 qubits with high fidelity.
- Mohsin Iqbal
- , Nathanan Tantivasadakarn
- & Henrik Dreyer
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Article |
Observation and quantification of the pseudogap in unitary Fermi gases
This study describes experiments with ultracold lithium Fermi gases in which many-body pairing leads to the emergence of a pseudogap, and it confirms theoretical predictions relevant to cuprate superconductivity.
- Xi Li
- , Shuai Wang
- & Jian-Wei Pan
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Research Highlight |
Who needs qubits? Physicists make light-based ‘qumodes’ for quantum computing
Careful retooling of laser beams allows scientists to harness photons for performing quantum calculations.
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News & Views |
Mobile atoms enable efficient computation with logical qubits
Small groups of mobile neutral atoms have been manipulated with extraordinary control to form ‘logical’ quantum bits. These qubits can perform quantum computations more reliably than can individual atoms.
- Barbara M. Terhal
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Article |
Observing dynamical phases of BCS superconductors in a cavity QED simulator
The dynamical phases of out-of-equilibrium Bardeen–Cooper–Schrieffer superconductors have been simulated using cold atoms levitated inside an optical cavity.
- Dylan J. Young
- , Anjun Chu
- & James K. Thompson
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Research Briefing |
A layered metal confines heavy electrons to two dimensions
In heavy-fermion compounds, hybridization between mobile charge carriers and localized magnetic moments gives rise to exotic quantum phenomena. The discovery of heavy fermions in a van der Waals metal that can be peeled apart to a layer a few atoms thick allows these phenomena to be studied and manipulated in two dimensions.
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Research Highlight |
A quantum fix makes e-commerce more tamper-resistant
Light pulses with specific quantum properties could be harnessed to send digital ‘contracts’ between buyer and seller.
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Research Briefing |
Spin supersolid with giant magnetocaloric effect promises a new route to extreme cooling
Supersolids are long-sought-after quantum materials with two seemingly contradictory features: a rigid solid structure and superfluidity. A triangular-lattice cobaltate material provides evidence for a quantum spin analogue of supersolidity, with an additional giant magnetocaloric effect — discoveries that pave the way for helium-free cooling to temperatures below 1 kelvin with frustrated quantum magnets.
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Article
| Open AccessEncoding a magic state with beyond break-even fidelity
A scheme to prepare a magic state, an important ingredient for quantum computers, on a superconducting qubit array using error correction is proposed that produces better magic states than those that can be prepared using the individual qubits of the device.
- Riddhi S. Gupta
- , Neereja Sundaresan
- & Benjamin J. Brown
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News Feature |
The AI–quantum computing mash-up: will it revolutionize science?
Scientists are exploring the potential of quantum machine learning. But whether there are useful applications for the fusion of artificial intelligence and quantum computing is unclear.
- Davide Castelvecchi
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Book Review |
Black holes, love and poetry — an artistic exploration of intimacy and adventure
A book by physicist Kip Thorne and artist Lia Halloran explores the mysteries of space through poetry and paintings.
- Ron Cowen
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Essay |
Does quantum theory imply the entire Universe is preordained?
The popular idea that quantum physics implies everything is random and nothing is certain might be as far from the truth as it could possibly be.
- Eddy Keming Chen
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News & Views |
The laser trick that could put an ultraprecise optical clock on a chip
Researchers have made a key breakthrough in how light is used to control time signals from the world’s most precise clocks. The technique marks a crucial step in bringing this technology into everyday life.
- Mengxi Tan
- & David J. Moss
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News |
Quantum-computing approach uses single molecules as qubits for first time
Platforms based on molecules manipulated using ‘optical tweezers’ might be able to perform complex physics calculations.
- Davide Castelvecchi
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Research Briefing |
Probing single electron spins with an atomic force microscope for quantum applications
Electron spin resonance is a standard method for studying the structure of chemical compounds, and it can also be used to control quantum spin states. Combining electron spin resonance with atomic force microscopy allows single spins to be manipulated in single molecules — with potential applications in quantum computing and elsewhere.
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Article
| Open AccessLogical quantum processor based on reconfigurable atom arrays
A programmable quantum processor based on encoded logical qubits operating with up to 280 physical qubits is described, in which improvement of algorithmic performance using a variety of error-correction codes is enabled.
- Dolev Bluvstein
- , Simon J. Evered
- & Mikhail D. Lukin