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Showing 1–50 of 516 results
  • The authors demonstrate a simple direct-current-measurement characterization of a quarter-wavelength superconducting coplanar waveguide resonator using an on-chip bolometer. This approach offers simpler experimental instrumentation and much larger frequency range of operation compared to traditional RF techniques.

    • Christoforus Dimas Satrya
    • Yu-Cheng Chang
    • Jukka P. Pekola
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-7
  • A superconducting diode bridge based on superconducting diodes can function as a full-wave rectifier with an efficiency up to 42 ± 5%, and can offer alternating current to direct current signal conversion capabilities at frequencies up to 40 kHz.

    • Josep Ingla-Aynés
    • Yasen Hou
    • Jagadeesh S. Moodera
    Research
    Nature Electronics
    Volume: 8, P: 411-416
  • Cluster states are a key resource in quantum technologies, but generation of large-scale 2D cluster states faces several difficulties. Here, the authors show how to generate a 2 × n ladder-like cluster state via sequential emission of time- and frequency multiplexed photonic qubits from a transmon-based device.

    • James O’Sullivan
    • Kevin Reuer
    • Andreas Wallraff
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-7
  • Trapping electrons on a superfluid helium surface provides access to collective quantum phenomena and a platform for circuit quantum electrodynamics (cQED). Here, the authors demonstrate precision spatial and frequency engineering of plasmonic modes in a hybrid electron-on-helium system, opening the door towards integration of plasmon physics within future cQED-like devices.

    • Camille A. Mikolas
    • Niyaz R. Beysengulov
    • Johannes Pollanen
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-8
  • Pearl inductance in thin films of YBCO enables terahertz superinductance and achieves impedance surpassing the quantum resistance limit, promising advancements in quantum and photonic technologies.

    • Yogesh Kumar Srivastava
    • Teng Chen Ietro Pang
    • Ranjan Singh
    Research
    Nature Materials
    Volume: 24, P: 883-890
  • Quantum information processing normally uses either discrete- or continuous-variable encoding. Here, the authors bridge the two approaches, showing how to entangle Schrodinger’s cats states by conversion between Bell states in the Fock and cat bases and by a simple Fock-state-like gate operation.

    • Daisuke Hoshi
    • Toshiaki Nagase
    • Jaw-Shen Tsai
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-10
  • Superconducting currents around a loop containing a weak link can be quantized and only change during discrete events called phase slips. Now, the heat generated by a single phase slip and the subsequent relaxation have been experimentally observed.

    • E. Gümüş
    • D. Majidi
    • C. B. Winkelmann
    Research
    Nature Physics
    Volume: 19, P: 196-200
  • A d-wave superconductor is used to mediate a long-range exchange coupling between two ferromagnetic insulators.

    • A. Di Bernardo
    • S. Komori
    • J. W. A. Robinson
    Research
    Nature Materials
    Volume: 18, P: 1194-1200
  • A circuit consisting of four superconducting diodes implemented in niobium nitride thin film on a single chip can achieve alternating to direct current conversion with 50 MHz signals in periodic bursts.

    • Matteo Castellani
    • Owen Medeiros
    • Karl K. Berggren
    Research
    Nature Electronics
    Volume: 8, P: 417-425
  • Investigation of propagating microwave photons at millikelvin has long been hindered by the lack of adequate photon detectors. Here, the authors solved this problem with a nanobolometer and measured second-order photon correlations at millikelvin.

    • Aarne Keränen
    • Qi-Ming Chen
    • Mikko Möttönen
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-6
  • 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
    Research
    Nature
    Volume: 622, P: 730-734
  • By coupling two quantum dots via a superconductor-semiconductor hybrid region in a 2D electron gas, the authors achieve efficient splitting of Cooper pairs. Further, by applying a magnetic field perpendicular to the spin-orbit field, they can induce and measure large triplet correlations in the Cooper pair splitting process.

    • Qingzhen Wang
    • Sebastiaan L. D. ten Haaf
    • Srijit Goswami
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-7
  • Topological superconductivity may have important implications for fault-tolerant quantum computing, but its practical implementation remains challenging. Here, the authors report the fabrication of nanoscale heterojunctions based on superconducting β-Sn and topological Dirac semimetal α-Sn, showing superconducting diode rectification ratios up to 35%.

    • Le Duc Anh
    • Keita Ishihara
    • Masaaki Tanaka
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-8
  • The behaviour of a superconductor can be altered by changing its symmetry properties. Coherently coupling two Josephson junctions breaks time-reversal and inversion symmetries, giving rise to a device with a controllable superconducting diode effect.

    • Sadashige Matsuo
    • Takaya Imoto
    • Seigo Tarucha
    Research
    Nature Physics
    Volume: 19, P: 1636-1641
  • Dense random access memory is required for building future generations of superconducting computers. Here the authors study vortex-based memory cells, demonstrate their scalability to submicron sizes and robust word and bit-line operation at zero magnetic field.

    • Taras Golod
    • Lise Morlet-Decarnin
    • Vladimir M. Krasnov
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-8
  • An electrical heat engine has been realized at sub-Kelvin temperatures. It consists of a superconducting spin-selective tunnel junction of EuS/Al/AlOx/Co. The efficiency of the engine is quantified for different magnetic configurations.

    • Clodoaldo Irineu Levartoski de Araujo
    • Pauli Virtanen
    • Elia Strambini
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-8
  • A superconducting diode effect was recently reported in Nb/V/Ta superlattices, but the mechanism is not yet clear. Here, the authors study non-reciprocal critical current in Al/InAs nanowires and propose a generic extrinsic mechanism involving field-generated diamagnetic currents, which may explain the earlier Nb/V/Ta results.

    • Ananthesh Sundaresh
    • Jukka I. Väyrynen
    • Leonid P. Rokhinson
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-7
  • The authors fabricate a fluxonium circuit using a granular aluminium nanoconstriction to replace the conventional superconductor–insulator–superconductor tunnel junction. Their characterization suggests that this approach will be a useful element in the superconducting qubit toolkit.

    • D. Rieger
    • S. Günzler
    • I. M. Pop
    Research
    Nature Materials
    Volume: 22, P: 194-199
  • Quantum bath engineering in the context of circuit quantum electrodynamics typically relies on single-photon losses. Aiello et al. demonstrate an approach for engineering higher-order photon losses in a microwave resonator coupled to a tunnel junction, which may be utilized in quantum information applications.

    • Gianluca Aiello
    • Mathieu Féchant
    • Jérôme Estève
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-6
  • Multiterminal Josephson junctions may provide a novel way to realize topologically non-trivial band structures in an n-dimensional phase space. Here, the authors experimentally demonstrate the proposed necessary conditions to measure these states.

    • Gino V. Graziano
    • Mohit Gupta
    • Vlad S. Pribiag
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-8
  • The detection of high-frequency radiation emitted by a quantum conductor is promising but current approaches exhibit limited sensitivity. Here, Jompol et al. propose on-chip radiation detection based on photo-assisted shot noise and show the response to be independent of the nature and geometry of the quantum conductor.

    • Y. Jompol
    • P. Roulleau
    • D. C. Glattli
    Research
    Nature Communications
    Volume: 6, P: 1-5
  • Disorder has been a prime challenge to study the topological properties in a hybrid system. Here, Zhanget al. report ballistic superconductivity in InSb nanowires interfacing with a NbTiN superconductor, paving the way for disorder-free Majorana devices.

    • Hao Zhang
    • Önder Gül
    • Leo P. Kouwenhoven
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-7
  • Superconducting circuits are promising for quantum computing, but quasiparticle tunnelling across Josephson junctions introduces qubit decoherence. Ristè et al. convert a transmon qubit into its own real-time quasiparticle tunnelling detector and accurately measure induced decoherence in the millisecond range.

    • D. Ristè
    • C. C. Bultink
    • L. DiCarlo
    ResearchOpen Access
    Nature Communications
    Volume: 4, P: 1-6
  • Understanding the decay of persistent current in superconducting rings remains obscure. Here, the authors show detailed agreement between measurements of the persistent current in isolated flux-biased rings and Ginzburg-Landau theory over a wide range of parameters, providing a quantitative picture of the free energy landscape.

    • I. Petković
    • A. Lollo
    • J. G. E. Harris
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-7
  • Radio-frequency circuits offer fast low-noise detection of signals in carbon nanotubes, but incompatibilities in fabrication degrade the performance of the hybrid device. Here, the authors use a deterministic mechanical transfer to couple pristine nanotubes to a gigahertz superconducting matching circuit.

    • V. Ranjan
    • G. Puebla-Hellmann
    • C. Schönenberger
    Research
    Nature Communications
    Volume: 6, P: 1-6
  • Interface transparency between 2D semiconductors and superconductors is a longstanding problem, seriously hindering potential applications. Here, using a new hybrid system, Kjaergaard et al. report quantized conductance doubling and a hard superconducting gap measured via a quantum point contact, indicating a near pristine interface.

    • M. Kjaergaard
    • F. Nichele
    • C. M. Marcus
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-6
  • Single-photon detection is challenging in the microwave regime due to the small photon energy. Here, the authors demonstrate the deterministic detection of single microwave photons through an impedenance-matched artificial Λ system composed by a driven superconducting qubit and a microwave resonator.

    • Kunihiro Inomata
    • Zhirong Lin
    • Yasunobu Nakamura
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-7
  • Objective collapse theories are formulations of quantum physics that attempt to solve the measurement problem through modified dynamical laws. Here, the authors constrain such theories by testing a generalization of the Leggett-Garg inequality in a superconducting flux qubit experiment.

    • George C. Knee
    • Kosuke Kakuyanagi
    • William J. Munro
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-5
  • Tests of the Bell-Kochen-Specker theorem aim at showing that the measurement statistics of a single qutrit are incompatible with noncontextual realism. Here, the authors use a superconducting qutrit with deterministic readouts to violate a noncontextuality inequality, ruling out several loopholes.

    • Markus Jerger
    • Yarema Reshitnyk
    • Arkady Fedorov
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-6
  • The absence of a bandgap in the electronic spectrum of graphene can be overcome by breaking its lattice symmetry. The authors show that the insulating state of gapped graphene is electrically shorted by narrow edge channels exhibiting high conductivity.

    • M. J. Zhu
    • A. V. Kretinin
    • M. Ben Shalom
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-6
  • The authors demonstrate a nanoscale particle-exchange heat engine using a diradical molecule coupled to superconducting electrodes. By driving a phase transition into the Yu-Shiba-Rusinov regime, they achieve a fivefold boost in thermoelectric power, enabling advances in cryogenic heat recovery and quantum cooling.

    • Serhii Volosheniuk
    • Damian Bouwmeester
    • Pascal Gehring
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-8
  • A three-site Kitaev chain, constructed from three semiconducting quantum dots coupled by superconducting segments in a hybrid InSb/Al nanowire, shows enhanced robustness of edge zero-energy modes against variations in the coupling strengths or electrochemical potentials compared with a chain containing only two quantum dots.

    • Alberto Bordin
    • Chun-Xiao Liu
    • Grzegorz P. Mazur
    ResearchOpen Access
    Nature Nanotechnology
    Volume: 20, P: 726-731
  • Superconducting qubits operate at microwave frequencies, but it is much more efficient to transmit information optically. Now, a superconducting qubit has been controlled with an optical signal by using a microwave–optical quantum transducer.

    • Hana K. Warner
    • Jeffrey Holzgrafe
    • Marko Lončar
    Research
    Nature Physics
    Volume: 21, P: 831-838
  • The authors present microwave emission measurements on a resistively shunted Josephson junction based on a HgTe quantum well. They demonstrate that, with significant spurious inductance in the shunt wiring, additional microwave emission peaks appear at half of the Josephson frequency, which can mimic the 4π-periodicity of topological Andreev states.

    • Wei Liu
    • Stanislau U. Piatrusha
    • Laurens W. Molenkamp
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-10
  • Background radiation has been identified as a key factor limiting the coherence times of superconducting circuits. Here, the authors measure the impact of environmental and cosmic radiation on a superconducting resonator with varying degrees of shielding, including an underground facility.

    • L. Cardani
    • F. Valenti
    • I. M. Pop
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-6
  • A superconducting diode that has zero resistance in only one direction is realized in an artificially engineered superlattice without inversion symmetry, enabling directional charge transport without energy loss.

    • Fuyuki Ando
    • Yuta Miyasaka
    • Teruo Ono
    Research
    Nature
    Volume: 584, P: 373-376
  • A recent finding of tuning critical current in metallic nanowires by application of small gate voltages seems at odds with general understanding. Here, Ritter et al. study similar nanowires and link the origin of the critical current suppression to tunneling of few high-energy electrons between gate and nanowire, ruling out direct tuning by electric fields.

    • M. F. Ritter
    • A. Fuhrer
    • F. Nichele
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-6
  • A recent report on electrostatic field effect in superconducting devices provides a high potential for advanced quantum technology, but it remains controversial. Here, the authors report that the suppression of critical current, which was attributed to the field effect, can instead be explained by quasiparticle excitations in the constriction of superconducting devices.

    • I. Golokolenov
    • A. Guthrie
    • V. Tsepelin
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-7
  • Coherent conversion between optical and microwave photonics is needed for future quantum applications. Here, the authors combine thin-film lithium niobate and superconductor platforms as a hybrid electro-optic system to achieve high-efficiency frequency conversion between microwave and optical modes.

    • Yuntao Xu
    • Ayed Al Sayem
    • Hong X. Tang
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-7
  • Theories predict teleportation of phase-coherent single electrons through a topological superconducting island. Here, the authors report persistent Coulomb blockade conductance peaks due to coherent transport of single electrons through patterned InAs-Al islands embedded in an Aharonov-Bohm interferometer.

    • A. M. Whiticar
    • A. Fornieri
    • F. Nichele
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-6
  • Hybrid superconductor-semiconductor devices offer a promising platform for topological superconductivity. Here, Ke and Moehle et al. create ballistic Josephson junctions in InSb quantum wells and use magnetic and electric fields to control their free energy landscape.

    • Chung Ting Ke
    • Christian M. Moehle
    • Srijit Goswami
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-6
  • Studying quantum phase transitions at oxide interfaces provide a key to understand emergent two-dimensional (2D) superconductivity. Here, Chen et al. report comprehensive electronic phase diagram of the 2D electron system at the superconducting LaAlO3/SrTiO3 interface with independent control of carrier density and disorder.

    • Zhuoyu Chen
    • Adrian G. Swartz
    • Harold Y. Hwang
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-6
  • The superconducting proximity effect on the surface state of a topological insulator is promising to generate topological superconductivity. Here, Yasuda et al. reported enhanced nonreciprocal charge transport in a Bi2Te3/FeTe heterostructure with an emerging superconducting order parameter.

    • Kenji Yasuda
    • Hironori Yasuda
    • Yoshinori Tokura
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-6
  • In this work, Manenti et al. present measurements of a device in which a tuneable transmon qubit is piezoelectrically coupled to a surface acoustic wave cavity, realising circuit quantum acoustodynamic architecture. This may be used to develop new quantum acoustic devices.

    • Riccardo Manenti
    • Anton F. Kockum
    • Peter J. Leek
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-6
  • Understanding the ground state (GS) phase transitions in the quantum tunneling regime of a superconducting system is important for future qubit devices. Here, Shen, Heedt and Borsoi et al. report distinct types of fermion parity GS transitions as a function of magnetic field and gate voltages in a Coulomb-blockaded InSb–Al island.

    • Jie Shen
    • Sebastian Heedt
    • Leo P. Kouwenhoven
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-8