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Showing 1–8 of 8 results
Advanced filters: Author: Thaddeus D. Ladd Clear advanced filters

  • A large nuclear spin has been successfully placed in a Schrödinger cat state, a superposition of its two most widely separated spin coherent states. This can be used as an error-correctable qubit.

    • Xi Yu
    • Benjamin Wilhelm
    • Andrea Morello
    Research
    Nature Physics
    Volume: 21, P: 362-367

  • Random sequences of unitary gate operations on an exchange-only qubit encoded in three physical electron qubits are performed using only voltage pulses and exhibit an average total error of 0.35%, where half of the error originates from leakage out of the computational subspace caused by interactions with substrate nuclear spins.

    • Reed W. Andrews
    • Cody Jones
    • Matthew G. Borselli
    Research
    Nature Nanotechnology
    Volume: 14, P: 747-750

  • Single electrons in quantum dots can be disturbed by the apparatus used to measure them. The disturbance can be mediated by incoherent phonons — literally, noise. Engineering acoustic interference could negate these deleterious effects and bring quantum dots closer to becoming a robust quantum technology.

    • Thaddeus D. Ladd
    News & Views
    Nature Physics
    Volume: 8, P: 511-512

  • An ultrafast, all-optical spin echo technique is used to increase the decoherence time of a single quantum dot electron spin from nanoseconds to several microseconds. The ratio of decoherence time to gate time exceeds 105, suggesting strong promise for future photonic quantum information processors and repeater networks.

    • David Press
    • Kristiaan De Greve
    • Yoshihisa Yamamoto
    Research
    Nature Photonics
    Volume: 4, P: 367-370

  • In this alternative approach to quantum computation, the all-electrical operation of two qubits, each encoded in three physical solid-state spin qubits, realizes swap-based universal quantum logic in an extensible physical architecture.

    • Aaron J. Weinstein
    • Matthew D. Reed
    • Matthew G. Borselli
    ResearchOpen Access
    Nature
    Volume: 615, P: 817-822

  • Electron spin in quantum dots are extensively studied as a qubit for quantum information processing. However, the coherence of electron spin is deleteriously influenced by nuclear spin. Quantum-dot holes are a potential alternative. Full control over hole-spin qubits is now achieved using picosecond lasers.

    • Kristiaan De Greve
    • Peter L. McMahon
    • Yoshihisa Yamamoto
    Research
    Nature Physics
    Volume: 7, P: 872-878

  • Nuclear spins are excellent qubits, but long-range interactions are difficult to establish. Here, the authors couple a 29Si nuclear spin to electrons in a lithographically defined quantum dot and show initialization, readout and entanglement with the electron spin. The 29Si retains its coherence under electron transfer between quantum dots.

    • Bas Hensen
    • Wister Wei Huang
    • Andrew S. Dzurak
    Research
    Nature Nanotechnology
    Volume: 15, P: 13-17