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- W2071116935 abstract "Superconducting circuits have attracted growing interest in recent years as a promising candidate for fault-tolerant quantum information processing. Extensive efforts have always been taken to completely shield these circuits from external magnetic fields to protect the integrity of the superconductivity. Here we show vortices can improve the performance of superconducting qubits by reducing the lifetimes of detrimental single-electron-like excitations known as quasiparticles. Using a contactless injection technique with unprecedented dynamic range, we quantitatively distinguish between recombination and trapping mechanisms in controlling the dynamics of residual quasiparticle, and show quantized changes in quasiparticle trapping rate because of individual vortices. These results highlight the prominent role of quasiparticle trapping in future development of superconducting qubits, and provide a powerful characterization tool along the way. Superconducting circuits are one possible way of realizing qubits, but the time for which they can maintain their quantum state is limited by single-electron-like excitations. Wang et al. now demonstrate a technique for controlling these so-called quasiparticles and improving qubit lifetime." @default.
- W2071116935 created "2016-06-24" @default.
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- W2071116935 date "2014-12-18" @default.
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- W2071116935 title "Measurement and control of quasiparticle dynamics in a superconducting qubit" @default.
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- W2071116935 doi "https://doi.org/10.1038/ncomms6836" @default.
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