Results 11 to 20 of about 180,551 (346)
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
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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
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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.
S. Philips +14 more
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Entanglement in a qubit-qubit-tardigrade system [PDF]
New Journal of Physics, 2022 Abstract Quantum and biological systems are seldom discussed together as they seemingly demand opposing conditions. Life is complex, ‘hot and wet’ whereas quantum objects are small, cold and well controlled. Here, we overcome this barrier with a tardigrade—a microscopic multicellular organism known to tolerate extreme physicochemical ...
K S Lee +10 more
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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
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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
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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
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Robust multi-qubit quantum network node with integrated error detection [PDF]
Science, 2022 Long-distance quantum communication and networking require quantum memory nodes with efficient optical interfaces and long memory times. We report the realization of an integrated two-qubit network node based on silicon-vacancy centers (SiVs) in diamond ...
P. Stas +17 more
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Beating the break-even point with a discrete-variable-encoded logical qubit [PDF]
Nature, 2022 Quantum error correction (QEC) aims to protect logical qubits from noises by using the redundancy of a large Hilbert space, which allows errors to be detected and corrected in real time^ 1 .
Zhongchu Ni +14 more
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Hartree-Fock on a superconducting qubit quantum computer [PDF]
Science, 2020 Twelve-qubit quantum computing for chemistry Accurate electronic structure calculations are considered one of the most anticipated applications of quantum computing that will revolutionize theoretical chemistry and other related fields.
F. Arute +80 more
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