Sampling and scrambling on a chain of superconducting qubits
arXiv:1711.11026 · doi:10.1103/PhysRevApplied.10.024052
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.
11 pages
References in corpus (8)
- Direct Fidelity Estimation from Few Pauli Measurements
- A blueprint for demonstrating quantum supremacy with superconducting qubits
- Randomizing quantum states: Constructions and applications
- Symmetrised Characterisation of Noisy Quantum Processes
- Emulating many-body localization with a superconducting quantum processor
- Chaos, Complexity, and Random Matrices
- Measurement of many-body chaos using a quantum clock
- Decoherence and Interferometric Sensitivity of BosonSampling in Superconducting Networks
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