Universal control of a six-qubit quantum processor in silicon [PDF]
Nature, 2022 Future quantum computers capable of solving relevant problems will require a large number of qubits that can be operated reliably1. However, the requirements of having a large qubit count and operating with high fidelity are typically conflicting.
Mateusz T Mądzik +2 more
exaly +2 more sources
Superconducting qubit to optical photon transduction
Nature, 2020 Conversion of electrical and optical signals lies at the foundation of the global internet. Such converters are used to extend the reach of long-haul fibre-optic communication systems and within data centres for high-speed optical networking of computers.
Mohammad Mirhosseini +2 more
exaly +2 more sources
Stabilization and operation of a Kerr-cat qubit
Nature, 2020 Alexander Grimm +2 more
exaly +2 more sources
Suppressing quantum errors by scaling a surface code logical qubit [PDF]
Nature, 2022 Practical quantum computing will require error rates well below those achievable with physical qubits. Quantum error correction^ 1 , 2 offers a path to algorithmically relevant error rates by encoding logical qubits within many physical qubits, for which
R. Acharya +157 more
semanticscholar +1 more source
High-fidelity spin qubit operation and algorithmic initialization above 1 K [PDF]
Nature, 2023 The encoding of qubits in semiconductor spin carriers has been recognized as a promising approach to a commercial quantum computer that can be lithographically produced and integrated at scale1–10.
J. Y. Huang +26 more
semanticscholar +1 more source
Systematic improvements in transmon qubit coherence enabled by niobium surface encapsulation [PDF]
npj Quantum Information, 2023 We present a transmon qubit fabrication technique that yields systematic improvements in T _1 relaxation times. We encapsulate the surface of niobium and prevent the formation of its lossy surface oxide.
M. Bal +39 more
semanticscholar +1 more source
Towards practical quantum computers: transmon qubit with a lifetime approaching 0.5 milliseconds [PDF]
npj Quantum Information, 2022 Here we report a breakthrough in the fabrication of a long lifetime transmon qubit. We use tantalum films as the base superconductor. By using a dry etching process, we obtained transmon qubits with a best T 1 lifetime of 503 μs. As a comparison, we also
Chenlu Wang +27 more
semanticscholar +2 more sources
Qubit teleportation between non-neighbouring nodes in a quantum network [PDF]
Nature, 2021 Future quantum internet applications will derive their power from the ability to share quantum information across the network1,2. Quantum teleportation allows for the reliable transfer of quantum information between distant nodes, even in the presence of
S. Hermans +5 more
semanticscholar +1 more source
Quantum walks on a programmable two-dimensional 62-qubit superconducting processor [PDF]
Science, 2021 Simulating quantum walkers Quantum walks are the quantum mechanical analogs of classical random walks, describing the propagation of a quantum walker across a lattice, and find application in developing algorithms for simulating quantum many-body systems.
M. Gong +35 more
semanticscholar +1 more source
Two-qubit silicon quantum processor with operation fidelity exceeding 99% [PDF]
Science Advances, 2021 Silicon spin qubits satisfy the necessary criteria for quantum information processing. However, a demonstration of high-fidelity state preparation and readout combined with high-fidelity single- and two-qubit gates, all of which must be present for ...
A. Mills +6 more
semanticscholar +1 more source