Featured
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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 |
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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A superconducting nanowire single-photon camera with 400,000 pixels
The development of a 400,000-pixel superconducting nanowire single-photon detector array is described, improving the current state of the art by a factor of 400 and showing scalability well beyond the present demonstration.
- B. G. Oripov
- , D. S. Rampini
- & A. N. McCaughan
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| Open AccessDensity-wave ordering in a unitary Fermi gas with photon-mediated interactions
An experiment with atoms and photons provides a fully tunable and microscopically controllable platform for the experimental study of the interplay of superfluidity and density-wave order.
- Victor Helson
- , Timo Zwettler
- & Jean-Philippe Brantut
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Many-body cavity quantum electrodynamics with driven inhomogeneous emitters
Under strong excitation, inhomogeneously broadened solid-state emitters coupled with high cooperativity to a cavity demonstrate collectively induced transparency and dissipative many-body dynamics, resulting from cavity–ion coupling.
- Mi Lei
- , Rikuto Fukumori
- & Andrei Faraon
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Article
| Open AccessBeating the break-even point with a discrete-variable-encoded logical qubit
The lifetime of a qubit in a circuit quantum electrodynamics architecture can exceed the break-even point through quantum error correction, representing a key step towards scalable quantum computing.
- Zhongchu Ni
- , Sai Li
- & Dapeng Yu
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Quantum-enabled millimetre wave to optical transduction using neutral atoms
We report an ensemble of cold 85Rb atoms strongly coupled to a superconducting resonator and optical cavity, resulting in the demonstration of quantum-enabled transduction of millimetre wave photons to optical photons.
- Aishwarya Kumar
- , Aziza Suleymanzade
- & Jonathan Simon
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Ultrathin quantum light source with van der Waals NbOCl2 crystal
A van der Waals crystal, niobium oxide dichloride, with vanishing interlayer electronic coupling and considerable monolayer-like excitonic behaviour in the bulk, as well as strong and scalable second-order optical nonlinearity, is discovered, which enables a high-performance quantum light source.
- Qiangbing Guo
- , Xiao-Zhuo Qi
- & Andrew T. S. Wee
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Spin–orbit microlaser emitting in a four-dimensional Hilbert space
A fully integrated semiconductor microlaser that exploits spin–orbit coupling of light emits in a four-dimensional Hilbert space, with flexible control of up to six degrees of freedom.
- Zhifeng Zhang
- , Haoqi Zhao
- & Liang Feng
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Article
| Open AccessEntanglement-enhanced matter-wave interferometry in a high-finesse cavity
A matter-wave interferometer is demonstrated with an interferometric phase noise below the standard quantum limit, combining two core concepts of quantum mechanics, that a particle can simultaneously be in two places at once and entanglement between distinct particles.
- Graham P. Greve
- , Chengyi Luo
- & James K. Thompson
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| Open AccessEfficient generation of entangled multiphoton graph states from a single atom
Using a single memory atom in a cavity, a deterministic protocol is implemented to efficiently grow Greenberger–Horne–Zeilinger and linear cluster states by means of single-photon emissions.
- Philip Thomas
- , Leonardo Ruscio
- & Gerhard Rempe
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| Open AccessObservation of Rabi dynamics with a short-wavelength free-electron laser
Rabi dynamics between the ground state and an excited state in helium atoms are generated using femtosecond extreme-ultraviolet pulses from a seeded free-electron laser, which may allow ultrafast manipulation of coherent processes at short wavelengths.
- Saikat Nandi
- , Edvin Olofsson
- & Jan Marcus Dahlström
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| Open AccessQuantum computational advantage with a programmable photonic processor
Gaussian boson sampling is performed on 216 squeezed modes entangled with three-dimensional 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
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Article
| Open AccessQubit teleportation between non-neighbouring nodes in a quantum network
A quantum network formed by three optically connected nodes comprising solid-state qubits demonstrates the teleportation of quantum information between two non-neighbouring nodes, negating the need for a direct connection between them.
- S. L. N. Hermans
- , M. Pompili
- & R. Hanson
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Electrically tunable quantum confinement of neutral excitons
Electrically controlled quantum confinement of excitons to below 10 nm is achieved in a 2D semiconductor by combining in-plane electric fields with interactions between excitons and free charges.
- Deepankur Thureja
- , Atac Imamoglu
- & Puneet A. Murthy
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Single electrons on solid neon as a solid-state qubit platform
A solid-state single-electron qubit platform is demonstrated based on trapping and manipulating isolated single electrons on an ultraclean solid neon surface in vacuum, which performs near the state of the art for a charge qubit.
- Xianjing Zhou
- , Gerwin Koolstra
- & Dafei Jin
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Ultra-narrow optical linewidths in rare-earth molecular crystals
A study reports europium molecular crystals with optically addressable spin states that exhibit ultra-narrow linewidths, demonstrating the use of rare-earth molecular crystals as a platform for photonic quantum technologies.
- Diana Serrano
- , Senthil Kumar Kuppusamy
- & Philippe Goldner
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Nuclear spin-wave quantum register for a solid-state qubit
Via spin-exchange interactions with 51V5+ ions, an optically addressed 171Yb3+ qubit in a nuclear-spin-rich yttrium orthovanadate crystal is used to implement a reproducible nuclear-spin-based quantum memory, and entangled Yb–V Bell states are demonstrated.
- Andrei Ruskuc
- , Chun-Ju Wu
- & Andrei Faraon
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| Open AccessIntegrated photonics enables continuous-beam electron phase modulation
A silicon nitride microresonator is used for coherent phase modulation of a transmission electron microscope beam, with future applications in combining high-resolution microscopy with spectroscopy, holography and metrology.
- Jan-Wilke Henke
- , Arslan Sajid Raja
- & Tobias J. Kippenberg
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Programmable interactions and emergent geometry in an array of atom clouds
The reported network of connectivity between atomic ensembles is entirely programmable and independent of its geometrical arrangement, because of the interaction with an optical cavity.
- Avikar Periwal
- , Eric S. Cooper
- & Monika Schleier-Smith
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| Open AccessDirect limits for scalar field dark matter from a gravitational-wave detector
Using a gravitational-wave detector to listen for dark matter signatures, a direct search for scalar field dark matter was conducted and new upper limits are set on the coupling constants.
- Sander M. Vermeulen
- , Philip Relton
- & Holger Wittel
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Real-time optimal quantum control of mechanical motion at room temperature
Optimal quantum control of an optically trapped nanoparticle in its ground state is demonstrated at room temperature, using Kalman filtering to track its quantum trajectory in real time.
- Lorenzo Magrini
- , Philipp Rosenzweig
- & Markus Aspelmeyer
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Quantum-enhanced nonlinear microscopy
A quantum microscope obtains signal-to-noise beyond the photodamage limits of conventional microscopy, revealing biological structures within cells that would not otherwise be resolved.
- Catxere A. Casacio
- , Lars S. Madsen
- & Warwick P. Bowen
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Telecom-heralded entanglement between multimode solid-state quantum memories
Robust heralded entanglement between two solid-state quantum memories with temporal multiplexing is realized using photons at telecommunication wavelengths.
- Dario Lago-Rivera
- , Samuele Grandi
- & Hugues de Riedmatten
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Heralded entanglement distribution between two absorptive quantum memories
Heralded entanglement is realized between two solid-state absorptive quantum memories 3.5 metres apart and with a bandwidth of 1 gigahertz, and with a fidelity of approximately 80%.
- Xiao Liu
- , Jun Hu
- & Guang-Can Guo
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| Open AccessNondestructive detection of photonic qubits
A nondestructive detector of photonic qubits, comprising a single 87Rb atom trapped in the centre point of two crossed fibre-based optical resonators, is demonstrated.
- Dominik Niemietz
- , Pau Farrera
- & Gerhard Rempe
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Quantum circuits with many photons on a programmable nanophotonic chip
A system for realizing many-photon quantum circuits is presented, comprising a programmable nanophotonic chip operating at room temperature, interfaced with a fully automated control system.
- J. M. Arrazola
- , V. Bergholm
- & Y. Zhang
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| Open AccessCoherent X-ray−optical control of nuclear excitons
Suitably shaped X-ray pulses are used to coherently steer the quantum dynamics of atoms’ nuclei rather than their electrons, with few-zeptosecond temporal stability of the phase control.
- Kilian P. Heeg
- , Andreas Kaldun
- & Jörg Evers
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Integrated multi-wavelength control of an ion qubit
A surface-electrode ion-trap chip is demonstrated, which delivers all the wavelengths of light required for the preparation and operation of ion qubits.
- R. J. Niffenegger
- , J. Stuart
- & J. Chiaverini
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Review Article |
Programmable photonic circuits
The current state of programmable photonic integrated circuits is discussed, including recent developments in their building blocks, circuit architectures, electronic control and programming strategies, as well as different application spaces.
- Wim Bogaerts
- , Daniel Pérez
- & Andrea Melloni
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Waveguide quantum electrodynamics with superconducting artificial giant atoms
Superconducting giant atoms are realized in a waveguide by coupling small atoms to the waveguide at multiple discrete locations, producing tunable atom–waveguide coupling and enabling decoherence-free interactions.
- Bharath Kannan
- , Max J. Ruckriegel
- & William D. Oliver
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Deep strong light–matter coupling in plasmonic nanoparticle crystals
Photons and plasmons hybridize into polaritons in three-dimensional crystals of plasmonic nanoparticles, leading to deep strong light–matter coupling and the breakdown of the Purcell effect.
- Niclas S. Mueller
- , Yu Okamura
- & Stephanie Reich
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A subradiant optical mirror formed by a single structured atomic layer
A single two-dimensional array of atoms trapped in an optical lattice shows a tunable cooperative subradiant optical response, acting as a single-monolayer optical mirror with controllable reflectivity.
- Jun Rui
- , David Wei
- & Immanuel Bloch
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Spin squeezing of 1011 atoms by prediction and retrodiction measurements
A squeezed collective state of 1011 rubidium atoms is generated by quantum non-demolition measurements, and the accuracy of the estimation of their collective spin is improved using past quantum state retrodiction.
- Han Bao
- , Junlei Duan
- & Yanhong Xiao
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Exploring dynamical phase transitions with cold atoms in an optical cavity
Interactions between light and an ensemble of strontium atoms in an optical cavity can serve as a testbed for studying dynamical phase transitions, which are currently not well understood.
- Juan A. Muniz
- , Diego Barberena
- & James K. Thompson
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Control and single-shot readout of an ion embedded in a nanophotonic cavity
Single ytterbium ion qubits in nanophotonic cavities have long coherence times and can be optically read out in a single shot, establishing them as excellent candidates for optical quantum networks.
- Jonathan M. Kindem
- , Andrei Ruskuc
- & Andrei Faraon
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Experimental demonstration of memory-enhanced quantum communication
A solid-state spin memory is used to demonstrate quantum repeater functionality, which has the potential to overcome photon losses involved in long-distance transmission of quantum information.
- M. K. Bhaskar
- , R. Riedinger
- & M. D. Lukin
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Entanglement of two quantum memories via fibres over dozens of kilometres
The entanglement of two atomic-ensemble quantum memories via optical fibres, enabled by the use of cavity enhancement and quantum frequency conversion, is demonstrated over dozens of kilometres.
- Yong Yu
- , Fei Ma
- & Jian-Wei Pan
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Phonon heat transfer across a vacuum through quantum fluctuations
Conventionally, heat transfer occurs by conduction, convection or radiation, but has also been theoretically predicted to occur through quantum fluctuations across a vacuum; this prediction has now been confirmed experimentally.
- King Yan Fong
- , Hao-Kun Li
- & Xiang Zhang
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A gated quantum dot strongly coupled to an optical microcavity
Strong coupling between a gated semiconductor quantum dot and an optical microcavity is observed in an ultralow-loss frequency-tunable microcavity device.
- Daniel Najer
- , Immo Söllner
- & Richard J. Warburton
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Letter |
Global entangling gates on arbitrary ion qubits
Multi-qubit entangling gates are realized by simultaneously driving multiple motional modes of a linear chain of trapped ions with modulated external fields, achieving a fidelity of about 93 per cent with four qubits.
- Yao Lu
- , Shuaining Zhang
- & Kihwan Kim
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Letter |
Electric field correlation measurements on the electromagnetic vacuum state
Electro-optic detection in a nonlinear crystal is used to measure coherence properties of vacuum fluctuations of the electromagnetic field and deduce the spectrum of the ground state of electromagnetic radiation.
- Ileana-Cristina Benea-Chelmus
- , Francesca Fabiana Settembrini
- & Jérôme Faist
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Letter |
Measurement of quantum back action in the audio band at room temperature
Future gravitational-wave detectors are expected to be limited by quantum back action, which is now found in the audio band in a low-loss optomechanical system.
- Jonathan Cripe
- , Nancy Aggarwal
- & Thomas Corbitt
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Letter |
Superfluorescence from lead halide perovskite quantum dot superlattices
Cooperative quantum effects in superlattices of quantum dots made of caesium lead halide perovskite give rise to superfluorescence, with the individual emitters interacting coherently to give intense bursts of light.
- Gabriele Rainò
- , Michael A. Becker
- & Thilo Stöferle
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Letter |
Device-independent quantum random-number generation
Genuine, unpredictable quantum random-number generation that is provably secure against quantum and classical adversaries is demonstrated, certified by the loophole-free violation of a Bell inequality.
- Yang Liu
- , Qi Zhao
- & Jian-Wei Pan
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Letter |
A topological source of quantum light
Topologically protected edge states realized in a square array of ring resonators are used to demonstrate a robust source of heralded single photons produced by spontaneous four-wave mixing.
- Sunil Mittal
- , Elizabeth A. Goldschmidt
- & Mohammad Hafezi
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Letter |
Deterministic delivery of remote entanglement on a quantum network
Remote deterministic spin–spin entanglement is achieved using nitrogen–vacancy centres in diamonds and a single-photon entangling protocol, with much improved entangling rates compared to previously used two-photon protocols.
- Peter C. Humphreys
- , Norbert Kalb
- & Ronald Hanson
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Letter |
Deterministic quantum state transfer and remote entanglement using microwave photons
Deterministic quantum state transfer and entanglement generation is demonstrated between superconducting qubits on distant chips using single photons.
- P. Kurpiers
- , P. Magnard
- & A. Wallraff