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Ronald Hanson

Chronological feed of everything captured from Ronald Hanson.

Methane Pyrolysis for Hydrogen and Carbon Black: Experimental Benchmarking of Reaction Models

Methane pyrolysis offers a cleaner method for co-producing hydrogen and carbon black. This study provides experimental data from shock tube experiments, including gas-phase species concentrations, particle formation, and morphology. The findings serve as a benchmark for refining models that describe carbon black and hydrogen synthesis from methane, highlighting discrepancies in current model predictions for polycyclic aromatic hydrocarbons and particle induction times.

Unconditional Quantum Teleportation for Remote Quantum Gates in Solid-State Qubits

Researchers have successfully demonstrated an unconditional Controlled-NOT quantum gate between remote diamond-based qubit devices. This advancement utilizes quantum teleportation protocols, leveraging remote entanglement, local quantum logic, and real-time classical communication. This system addresses a critical need for distributed quantum computing and complex quantum network protocols by enabling non-local gates without post-selection.

SnV Centers Achieve Above-Unity Coherent Cooperativity in Photonic Crystal Cavities

This work demonstrates above-unity coherent cooperativity for tin-vacancy (SnV) centers embedded in photonic crystal cavities (PCCs). This achievement is crucial for advancing quantum network development, as coherent light-matter interfaces are a foundational requirement for entanglement generation protocols. The experimental results show high quality factors and significant extinction contrast, confirming the enhanced SnV light-matter interaction.

Efficient Quantum Frequency Conversion of SnV Center Photons to Telecom Wavelengths

This study demonstrates highly efficient and low-noise quantum frequency conversion (QFC) of 619 nm photons from diamond tin-vacancy (SnV) centers to 1480 nm telecom S-band wavelengths. The QFC process uses an actively stabilized cavity and a KTA crystal, achieving significant conversion efficiency and low spectral noise. This development is crucial for integrating SnV centers into metropolitan-scale fiber-based quantum networks.

Enhanced Spin-Photon Interface for Quantum Networks

This paper demonstrates a significant advancement in quantum information science by developing an efficient interface between a diamond nitrogen-vacancy (NV) center spin qubit and single photons. The integration of a Purcell-enhanced open microcavity with on-chip microwave lines enables efficient photon collection and coherent spin qubit control, leading to improved photon detection probabilities and the generation of entangled spin-photon states. This technology is critical for advancing quantum network capabilities.