Quantum physics articles within Nature Communications

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  • Article
    | Open Access

    Scanning NV center magnetometry enables imaging of weak magnetic fields at the nanoscale. Huxter et al. achieve an order-of-magnitude improvement in sensitivity by converting a spatial field gradient into an AC field by mechanical oscillations of the sensor, and image stray fields from atomic steps in an antiferromagnet.

    • W. S. Huxter
    • , M. L. Palm
    •  & C. L. Degen

  • Article
    | Open Access

    Quantum simulators should be able to give insight on exotic physics models such as supersymmetric extensions of Standard Model. Here, the authors demonstrate a first step in this direction, realising a prototypical SUSY model (and spontaneous SUSY breaking within it) using a trapped ion quantum simulator.

    • M.-L. Cai
    • , Y.-K. Wu
    •  & L.-M. Duan

  • Article
    | Open Access

    There is interest in measuring the vacuum fluctuations of electromagnetic radiation. Here the authors demonstrate quantum-vacuum electric field correlations between two regions which are outside the light-cone.

    • Francesca Fabiana Settembrini
    • , Frieder Lindel
    •  & Jérôme Faist

  • Article
    | Open Access

    Exotic quantum states can be advantageous for sensing, but are very fragile, so that some form of quantum error correction is needed. Here, the authors show how approximate QEC helps overcoming decoherence due to noise when measuring the excitation population of a receiver mode in a superconducting circuit.

    • W. Wang
    • , Z.-J. Chen
    •  & L. Sun

  • Article
    | Open Access

    Scattering of electrons from defects and boundaries in mesoscopic samples is encoded in quantum interference patterns of magneto-conductance, but these patterns are difficult to interpret. Here the authors use machine learning to reconstruct electron wavefunction intensities and sample geometry from magneto-conductance data.

    • Shunsuke Daimon
    • , Kakeru Tsunekawa
    •  & Eiji Saitoh

  • Article
    | Open Access

    Recent work has reported a realization of a time crystal in the form of the Bose-Einstein condensate of magnons in superfluid 3He. Here, the authors study the dynamics of a pair of such quantum time crystals and show that it closely resembles the evolution of a two-level system, modified by nonlinear feedback.

    • S. Autti
    • , P. J. Heikkinen
    •  & V. B. Eltsov

  • Article
    | Open Access

    In large qubit registers, long coherence times and individual qubit control are difficult to achieve at the same time. Here, the authors assemble a 2D register of qubits in an array of fermionic alkaline-earth atoms, where tailored pulses can be applied to subsets of individual qubits in parallel.

    • Katrina Barnes
    • , Peter Battaglino
    •  & Michael Yarwood

  • Article
    | Open Access

    An electron subject to a periodic potential and a constant electric field exhibit oscillatory dynamics, known as Bloch oscillations. Here, the authors demonstrate a magnetic analogue of Bloch oscillations in a ferromagnetic near-Ising chain, where magnetic excitations oscillate in response to a magnetic field.

    • Ursula B. Hansen
    • , Olav F. Syljuåsen
    •  & Kim Lefmann

  • Article
    | Open Access

    Superconducting quantum processors need to balance intentional disorder (to protect qubits) and nonlinear resonator coupling (to manipulate qubits), while avoiding chaotic instabilities. Berke et al. use the techniques of many-body localization theory to study the stability of current platforms against quantum chaos.

    • Christoph Berke
    • , Evangelos Varvelis
    •  & David P. DiVincenzo

  • Article
    | Open Access

    Quantum memories usually suffer from a trade-off between efficiency and excess noise. Here, by exploiting the time-reversal approach for improving modes matching, the authors show a warm-atomic-cell-based cavity-enhanced memory with 67% efficiency and noise level close to quantum noise limit.

    • Lixia Ma
    • , Xing Lei
    •  & Kunchi Peng

  • Article
    | Open Access

    Manipulating the rotational motions of molecules may provide a tool for controlling chemical processes. Here the authors demonstrate that the rotation of a D2 molecule can be stopped, upon collision with a metal surface, by a magnetic field that affects the rotational levels to a much smaller extent than the energy difference upon de-excitation.

    • Helen Chadwick
    • , Mark F. Somers
    •  & Gil Alexandrowicz

  • Article
    | Open Access

    Continuous quantum error correction requires less ancillary resources compared to standard QEC methods. Here, the authors demonstrate experimentally a continuous quantum error correction code in a planar superconducting architecture.

    • William P. Livingston
    • , Machiel S. Blok
    •  & Irfan Siddiqi

  • Comment
    | Open Access

    Controlling dimensionality and strain in actinide heterostructures will provide unrivaled opportunities for exploring novel quantum phenomena. We discuss the promises, challenges, and synthesis routes for these actinide-bearing heterostructures with complex electron correlations for functional and energy materials.

    • Cody A. Dennett
    • , Narayan Poudel
    •  & Krzysztof Gofryk

  • Article
    | Open Access

    The computational capabilities of quantum annealing in the accessible regimes of operation are still subject to debate. Here, the authors study a model admitting an analytical solution far from the adiabatic regime, and show evidences of better convergence and energy relaxation rates over classical annealing.

    • Bin Yan
    •  & Nikolai A. Sinitsyn

  • Article
    | Open Access

    Tailoring topological physics in optical cavity is a challenge that would allow new possibilities for the design optical components. In this paper, the authors, harnessing the potential of synthetic dimensions, experimentally demonstrate a degenerate cavity containing many optical angular momenta.

    • Mu Yang
    • , Hao-Qing Zhang
    •  & Guang-Can Guo

  • Article
    | Open Access

    The presence of various noises in the qubit environment is a major limitation on qubit coherence time. Here, the authors demonstrate the use a closed-loop feedback to stabilize frequency noise in a flux-tunable superconducting qubit and suggest this as a scalable approach applicable to other types of noise.

    • Antti Vepsäläinen
    • , Roni Winik
    •  & William D. Oliver

  • Article
    | Open Access

    Quantum channel correction could provide a remedy to unavoidable losses in long-distance quantum communication, but the break-even point has escaped demonstration so far. Here, the authors fill this gap using distillation by heralded amplification, followed by teleportation of entanglement.

    • Sergei Slussarenko
    • , Morgan M. Weston
    •  & Geoff J. Pryde

  • Article
    | Open Access

    The current efforts to look for Majorana bound states (MBS) still cannot probe the hallmark property, the non-Abelian statistics. Here, the authors propose to realize non-Abelian statistics through MBS fusion in mini-gate controlled planar Josephson junctions.

    • Tong Zhou
    • , Matthieu C. Dartiailh
    •  & Igor Žutić

  • Article
    | Open Access

    Quantum heat transport devices are currently intensively studied. Here, the authors report the photonic heat transport modulated by superconducting qubit in a three-terminal device. Flux dependent heat power correlates with microwave measurements.

    • Azat Gubaydullin
    • , George Thomas
    •  & Jukka P. Pekola

  • Article
    | Open Access

    ’Systems with long coherence times are extremely important for the processing of quantum information. To this end the authors present a system able to cool down a resonator to its quantum mechanical ground state harnessing the large coupling between an ultra-coherent mechanical resonator and a superconducting circuit.’

    • Yannick Seis
    • , Thibault Capelle
    •  & Albert Schliesser

  • Article
    | Open Access

    Faithful conversion of quantum states between electrical circuits and light requires adding less than one input noise photon during conversion. Here, the authors demonstrate this based on coherent electro-optic upconversion with a transduction efficiency of 15%.

    • Rishabh Sahu
    • , William Hease
    •  & Johannes M. Fink

  • Article
    | Open Access

    Nuclear magnetic resonance imaging at the atomic scale has been limited to detection and localisation of single nuclear spins. Here, the authors extend imaging to large nuclear spin clusters in 3D by combining weak quantum measurements, phase encoding and simulated annealing.

    • K. S. Cujia
    • , K. Herb
    •  & C. L. Degen

  • Article
    | Open Access

    Recent work has demonstrated controlled fabrication of single carbon defect spins in the two-dimensional material WS2. Here, the authors use ab initio methods to determine the electronic and optical properties of this defect, establishing it as a viable qubit candidate operating close to the telecom band.

    • Song Li
    • , Gergő Thiering
    •  & Adam Gali

  • Article
    | Open Access

    Qudit-based quantum devices can outperform qubit-based ones, but a programmable qudit-based quantum computing device is still missing. Here, the authors fill this gap using a programmable silicon photonic chip employing ququart-based encoding, showing the scaling advantages compared to the qubit counterpart.

    • Yulin Chi
    • , Jieshan Huang
    •  & Jianwei Wang

  • Article
    | Open Access

    Synthetic dimensions, states of a system engineered to act as if they were a reconfigurable extra spatial dimension, have been demonstrated with different systems previously. Here the authors create a synthetic dimension using Rydberg atoms and configure it to support topological edge states.

    • S. K. Kanungo
    • , J. D. Whalen
    •  & T. C. Killian

  • Article
    | Open Access

    Applying the language of computational complexity to study real-world experiments requires a rigorous framework. Here, the authors provide such a framework and establish that there can be an exponential savings in resources if an experimentalist can entangle apparatuses with experimental samples.

    • Dorit Aharonov
    • , Jordan Cotler
    •  & Xiao-Liang Qi

  • Article
    | Open Access

    Spectral super-resolution methods generally apply only to laser spectroscopy. Here, thanks to a Gradient Echo Memory with time-frequency processing capabilities, the authors are able to resolve frequency differences with precision below the Fourier limit for narrowband and ultra-low input-light level.

    • Mateusz Mazelanik
    • , Adam Leszczyński
    •  & Michał Parniak

  • Article
    | Open Access

    Spin-orbit coupling in gate-defined quantum dots in silicon metal-oxide semiconductors provides a promising route for electrical control of spin qubits. Here, the authors demonstrate that intervalley spin–orbit interaction enables fast singlet–triplet qubit rotations in this platform, at frequencies exceeding 200MHz.

    • Ryan M. Jock
    • , N. Tobias Jacobson
    •  & Dwight R. Luhman

  • Article
    | Open Access

    Two-dimensional materials offer a promising platform for scalable solid-state spin qubit. Here, using high-throughput ab initio simulations, the authors identify suitable defect centers in monolayer group-VI transition metal dichalcogenides and assess their potential as qubits.

    • Jeng-Yuan Tsai
    • , Jinbo Pan
    •  & Qimin Yan

  • Article
    | Open Access

    Multi-gap topology is a new avenue in topological phases of matter but it remains difficult to verify in real materials. Here, the authors predict multi-gap topologies and associated phase transitions driven by braiding processes in the phonon spectra of monolayer silicates, providing clear signatures for experimental verification.

    • Bo Peng
    • , Adrien Bouhon
    •  & Robert-Jan Slager

  • Article
    | Open Access

    Fluctuations, both quantum and classical, contain important information about the underlying system. Here, the authors show that for measurements on a subregion with a sharp corner, fluctuations have the same shape dependence for a large variety of systems.

    • Benoit Estienne
    • , Jean-Marie Stéphan
    •  & William Witczak-Krempa

  • Article
    | Open Access

    Hole-spin qubits in germanium are promising candidates for rapid, all-electrical qubit control. Here the authors report Rabi oscillations with the record frequency of 540 MHz in a hole-based double quantum dot in a germanium hut wire, which is attributed to strong spin-orbit interaction of heavy holes.

    • Ke Wang
    • , Gang Xu
    •  & Guo-Ping Guo

  • Article
    | Open Access

    Implementations of shortcuts to adiabaticity for open quantum systems have proven challenging so far. Here, thanks to a multi-mode open loop and a unitary control counteracting the diabatic part of the Liouvillian, the authors demonstrate how to close this gap using a superconducting circuit QED system.

    • Zelong Yin
    • , Chunzhen Li
    •  & Shuoming An

  • Article
    | Open Access

    Exploiting technologies derived from the optical clocks community, the authors demonstrate a setup for twin-field QKD which extends the coherence times by three orders of magnitude, overcoming the main challenge towards real-world implementation.

    • Cecilia Clivati
    • , Alice Meda
    •  & Davide Calonico

  • Article
    | Open Access

    Previously, the study of caustics has mostly focused on experiments with light. Here, the authors demonstrate gravitational caustics and investigate catastrophe atom optics using the matter waves of an atom laser generated from a Bose-Einstein condensate.

    • M. E. Mossman
    • , T. M. Bersano
    •  & P. Engels

  • Article
    | Open Access

    Aumann’s agreement theorem states that observers of classical systems can’t “agree to disagree." Here, the authors show that the same epistemic consistency holds for observers of quantum states, but not for observers of post-quantum no-signalling boxes, hinting at its potential status as a physical principle.

    • Patricia Contreras-Tejada
    • , Giannicola Scarpa
    •  & Pierfrancesco La Mura

  • Article
    | Open Access

    Three-dimensional spin models with random hopping disorder are relevant to a large variety of physical systems. Here, the authors present an experimental realization of such a model in a Rydberg system with dipole-dipole coupling and show signatures of a localization-delocalization transition.

    • Carsten Lippe
    • , Tanita Klas
    •  & Herwig Ott

  • Article
    | Open Access

    Variational quantum algorithms (VQAs) are a leading candidate for useful applications of near-term quantum computing, but limitations due to unavoidable noise have not been clearly characterized. Here, the authors prove that local Pauli noise can cause vanishing gradients rendering VQAs untrainable.

    • Samson Wang
    • , Enrico Fontana
    •  & Patrick J. Coles

  • Article
    | Open Access

    A travelling wave inside a metal slit can reveal its own waveform by probing deflecting motions of charged particles. Here, a real-time THz oscilloscope was demonstrated by utilizing the relativistic electrons and the subwavelength slit waveguide.

    • In Hyung Baek
    • , Hyun Woo Kim
    •  & Young Uk Jeong

  • Article
    | Open Access

    The combination of superconducting nanowire single photon detectors and electro-optically reconfigurable circuits in a cryogenic environment is notoriously difficult to reach. Here, the authors realise this on a Lithium-Niobate-On-Insulator platform, reaching high speed modulation at a frequency up to 1 GHz.

    • Emma Lomonte
    • , Martin A. Wolff
    •  & Francesco Lenzini

  • Article
    | Open Access

    Single-photon emitters in 2D semiconductors hold promise for quantum applications, but usually operate in the 500-800 nm wavelength range. Here, the authors report site-controlled creation of quantum emitters in the telecommunication wavelength window by coupling 2D MoTe2 to strain inducing nano-pillar arrays.

    • Huan Zhao
    • , Michael T. Pettes
    •  & Han Htoon

  • Article
    | Open Access

    Cold atoms have recently become a versatile platform for the study of quantum transport phenomena. Here the authors realize an alternative experimental scheme for quantum transport with cold atoms, by using spin-dependent impurity scattering in a spinful Fermi gas instead of spatially separated particle distributions.

    • Koki Ono
    • , Toshiya Higomoto
    •  & Yoshiro Takahashi

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