Experimental Quantum Randomness Processing

Abstract

Coherently manipulating multipartite quantum correlations leads to remarkable advantages in quantum information processing. A fundamental question is whether such quantum advantages persist only by exploiting multipartite correlations, such as entanglement. Recently, Dale, Jennings, and Rudolph negated the question by showing that a randomness processing, quantum Bernoulli factory, using quantum coherence, is strictly more powerful than the one with classical mechanics. In this Letter, focusing on the same scenario, we propose a theoretical protocol that is classically impossible but can be implemented solely using quantum coherence without entanglement. We demonstrate the protocol by exploiting the high-fidelity quantum state preparation and measurement with a superconducting qubit in the circuit quantum electrodynamics architecture and a nearly quantum-limited parametric amplifier. Our experiment shows the advantage of using quantum coherence of a single qubit for information processing even when multipartite correlation is not present.

9 pages, 7 figures

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Cited by in corpus (13)

• The experimental realization of high-fidelity `shortcut-to-adiabaticity' quantum gates in a superconducting Xmon qubit
• Experimental demonstration of work fluctuations along a shortcut to adiabaticity with a superconducting Xmon qubit
• Single-shot realization of nonadiabatic holonomic gates with a superconducting Xmon qutrit
• Using quantum theory to reduce the complexity of input-output processes
• Quantitative wave-particle duality relations from the density matrix properties
• Witnessing quantum resource conversion within deterministic quantum computation using one pure superconducting qubit
• Quantum-to-Quantum Bernoulli Factory
• An Experimental Quantum Bernoulli Factory
• Hilbert-Schmidt quantum coherence in multi-qudit systems
• Modular Quantum-to-Quantum Bernoulli Factory in an Integrated Photonic Processor
• Polarization-encoded photonic quantum-to-quantum Bernoulli factory based on a quantum dot source
• General Quantum Bernoulli Factory: Framework Analysis and Experiments
• Complexity and multi-functional variants of the Quantum-to-Quantum Bernoulli Factories