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Superconducting Qubits

Sampling and scrambling on a chain of superconducting qubits

arXiv

Authors: Michael R. Geller

Year

2017

Paper ID

24808

Status

Preprint

Abstract Read

~2 min

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Abstract

We study a circuit, the Josephson sampler, that embeds a real vector into an entangled state of n qubits, and optionally samples from it. We measure its fidelity and entanglement on the 16-qubit ibmqx5 chip. To assess its expressiveness, we also measure its ability to generate Haar random unitaries and quantum chaos, as measured by Porter-Thomas statistics and out-of-time-order correlation functions. The circuit requires nearest-neighbor CZ gates on a chain and is especially well suited for first-generation superconducting architectures.

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We study a circuit, the Josephson sampler, that embeds a real vector into an entangled state of n qubits, and optionally samples from it.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1711.11026 [2] arXiv https://arxiv.org/abs/1711.11026 [3] Publisher https://arxiv.org/abs/1711.11026

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