paper / ronaldhanson / 27d ago
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.
methane-pyrolysishydrogen-productioncarbon-blackchemical-kineticsshock-tubesgas-particle-modelingmaterial-science
“Methane pyrolysis is a promising route for co-producing hydrogen (H2) and carbon black (CB) due to its lower emissions compared to conventional methods.”
paper / ronaldhanson / Jan 8
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.
quantum-teleportationquantum-gatessolid-state-qubitsquantum-networksquantum-computingquantum-information
“An unconditional Controlled-NOT quantum gate can be implemented between remote diamond-based qubit devices.”
paper / ronaldhanson / Nov 17
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.
quantum-computingquantum-networksquantum-opticssolid-state-qipphotonic-crystal-cavitiestin-vacancy-centers
“The tin-vacancy (SnV) center in diamond is a strong candidate for building quantum networks.”
paper / ronaldhanson / Sep 1
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.
quantum-computingquantum-networksquantum-frequency-conversionphoton-conversiontin-vacancy-centerstelecom-wavelengthsdiamond-quantum
“SnV centers emit photons at 619 nm, which is incompatible with existing metropolitan-scale quantum networks.”
paper / ronaldhanson / Jun 25
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.
quantum-computingspin-qubitsnanophotonicsdiamond-nv-centersquantum-information
“The research achieved an efficient interface between a spin qubit and single photons using a diamond nitrogen-vacancy center coupled to an open microcavity.”