Superconducting devices articles within Nature

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  • Article |

    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

  • Article |

    Spectroscopic measurements of individual rare-earth ion electron spins are performed by detecting their microwave fluorescence, with the method coming close to practical single-electron spin resonance at millikelvin temperatures.

    • Z. Wang
    • , L. Balembois
    •  & E. Flurin

  • Article
    | Open Access

    A loophole-free violation of Bell’s inequality with superconducting circuits shows that non-locality is a viable new resource in quantum information technology realized with superconducting circuits, promising many potential applications.

    • Simon Storz
    • , Josua Schär
    •  & Andreas Wallraff

  • Article |

    Optomechanical lattices in one and two dimensions with exceptionally low disorder are realized, showing how the optomechanical interaction can be exploited for direct measurements of the Hamiltonian, beyond the tight-binding approximation.

    • Amir Youssefi
    • , Shingo Kono
    •  & Tobias J. Kippenberg

  • Article |

    Using particle-by-particle assembly and adiabatic manipulation of disorder, low-entropy, strongly correlated quantum fluids of light are constructed, opening up new possibilities for the preparation of exotic phases of synthetic matter.

    • Brendan Saxberg
    • , Andrei Vrajitoarea
    •  & David I. Schuster

  • Article |

    Spin correlation experiments are demonstrated in an electron entangler device based on the ‘splitting’ of Cooper pairs from a superconductor, which can potentially be used to investigate many fundamental phases and processes related to the electron spin.

    • Arunav Bordoloi
    • , Valentina Zannier
    •  & Andreas Baumgartner

  • Article |

    Piezoelectric coupling of a single superconducting qubit to two phononic crystal nanoresonators results in an integrated device that is able to control and read out the quantum state of the two mechanical resonators.

    • E. Alex Wollack
    • , Agnetta Y. Cleland
    •  & Amir H. Safavi-Naeini

  • Article |

    Using continuous microwave application without substantial heating, Floquet–Andreev states in graphene Josephson junctions are realized, and their energy spectra are measured directly by superconducting tunnelling spectroscopy.

    • Sein Park
    • , Wonjun Lee
    •  & Gil-Ho Lee

  • Article |

    A chip-scale platform is developed for the conversion of a single microwave excitation of a superconducting qubit into optical photons, with potential uses in quantum computer networks.

    • Mohammad Mirhosseini
    • , Alp Sipahigil
    •  & Oskar Painter

  • Article |

    A fundamental superconducting qubit is introduced: ‘blochnium’ is dual to the transmon, relies on a circuit element called hyperinductance, and its fundamental physical variable is the quasicharge of the Josephson junction.

    • Ivan V. Pechenezhskiy
    • , Raymond A. Mencia
    •  & Vladimir E. Manucharyan

  • Article |

    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

  • Article |

    A qubit generated and stabilized in a superconducting microwave resonator by encoding it into Schrödinger cat states produced by Kerr nonlinearity and single-mode squeezing shows intrinsic robustness to phase-flip errors.

    • A. Grimm
    • , N. E. Frattini
    •  & M. H. Devoret

  • Letter |

    A hybrid platform comprising a microwave superconducting qubit and a nanomechanical piezoelectric oscillator is used to resolve the phonon number states of the oscillator.

    • Patricio Arrangoiz-Arriola
    • , E. Alex Wollack
    •  & Amir H. Safavi-Naeini

  • Letter |

    A parametrically driven 30-micrometre-long silicon nanostring oscillator emits stationary path-entangled microwave radiation, squeezing the joint field operators of two thermal modes by 3.4 decibels below the vacuum level.

    • S. Barzanjeh
    • , E. S. Redchenko
    •  & J. M. Fink

  • Article |

    Engineered dissipation is used to stabilize a Mott-insulator phase of photons trapped in a superconducting circuit, providing insights into thermalization processes in strongly correlated quantum matter.

    • Ruichao Ma
    • , Brendan Saxberg
    •  & David I. Schuster

  • Letter |

    Quantum entanglement is demonstrated in a system of massive micromechanical oscillators coupled to a microwave-frequency electromagnetic cavity by driving the devices into a steady state that is entangled.

    • C. F. Ockeloen-Korppi
    • , E. Damskägg
    •  & M. A. Sillanpää

  • Article |

    Group III/nitride semiconductors have been grown epitaxially on the superconductor niobium nitride, allowing the superconductor’s macroscopic quantum effects to be combined with the semiconductors’ electronic, photonic and piezoelectric properties.

    • Rusen Yan
    • , Guru Khalsa
    •  & Debdeep Jena

  • Article |

    A single spin in silicon is strongly coupled to a microwave-frequency photon and coherent single-spin dynamics are observed using circuit quantum electrodynamics.

    • X. Mi
    • , M. Benito
    •  & J. R. Petta

  • Letter |

    A cryogenic thermal imaging technique that uses a superconducting quantum interference device fabricated on the tip of a sharp pipette can be used to image the thermal signature of extremely low power nanometre-scale dissipation processes.

    • D. Halbertal
    • , J. Cuppens
    •  & E. Zeldov

  • Letter |

    The splitting of zero-energy Majorana modes in a tunnel-coupled InAs nanowire with epitaxial aluminium is exponentially suppressed as the wire length is increased, resulting in protection of these modes; this result helps to establish the robust presence of Majorana modes and quantifies exponential protection in nanowire devices.

    • S. M. Albrecht
    • , A. P. Higginbotham
    •  & C. M. Marcus

  • Letter |

    To be able to control the properties of a system that has strong electron–electron interactions using only an external electric field would be ideal, but the material must be thin enough to avoid shielding of the electric field in the bulk material; here pure electric-field control of the charge-density wave and superconductivity transition temperatures is achieved by electrolyte gating through an electric-field double layer transistor in the two-dimensional material 1T-TiSe2.

    • L. J. Li
    • , E. C. T. O’Farrell
    •  & A. H. Castro Neto

  • Letter |

    A fundamental and previously unobserved aspect of the Josephson effect is revealed through spectroscopic measurements of the excited Andreev states in superconducting atomic contacts.

    • L. Bretheau
    • , Ç. Ö. Girit
    •  & C. Urbina

  • Letter |

    The quantum light–matter interaction between a superconducting artificial atom and squeezed vacuum reduces the transverse radiative decay rate of the atom by a factor of two, allowing the corresponding coherence time, T2, to exceed the ordinary vacuum decay limit, 2T1.

    • K. W. Murch
    • , S. J. Weber
    •  & I. Siddiqi

  • Letter |

    Use of a three-level system allows the Toffoli gate, an important primitive for quantum error correction schemes, to be implemented with many fewer elementary gates than was previously thought possible.

    • A. Fedorov
    • , L. Steffen
    •  & A. Wallraff

  • Letter |

    Quantum entanglement is one of the key resources required for quantum computation. In superconducting devices, two-qubit entangled states have been used to implement simple quantum algorithms, but three-qubit states, which can be entangled in two fundamentally different ways, have not been demonstrated. Here, however, three superconducting phase qubits have been used to create and measure these two entangled three-qubit states.

    • Matthew Neeley
    • , Radoslaw C. Bialczak
    •  & John M. Martinis

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