🧲 Free Energy

GROMACS, a versatile and efficient software suite for molecular dynamics simulations, has seen significant performance enhancements in its free-energy perturbation calculations through the use of graphics processing units (GPUs). Recent advancements have focused on optimizing these calculations, critical for understanding molecular interactions and predicting binding affinities in drug discovery…

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The post Technologies Beyond the Standard Model of Physics by Avi Loeb – Medium appeared first on .

A groundbreaking wind energy solution has emerged from Spain, promising to reshape the renewable energy landscape. A 24-meter-tall vertical-axis wind turbine (VAWT), developed by the Spanish startup Vortex Bladeless, is capable of generating 25,000 kilowatt-hours (kWh) of electricity annually—enough to supply power to an average household for over two years.

Unlike traditional wind turbines with rotating blades, the Vortex turbine harnesses energy through oscillation. Inspired by the principle of vortex shedding, the device vibrates in response to wind currents, converting this kinetic energy into electricity using a linear alternator and piezoelectric materials. This bladeless design significantly reduces noise, mechanical wear, and risks to wildlife—especially birds—making it an environmentally friendly complement or alternative to conventional wind and solar systems.

What sets this turbine apart is its compact footprint and adaptability. Standing at 24 meters with a relatively simple structure, it’s easier and less expensive to install and maintain compared to traditional wind turbines. It can also function efficiently in environments with variable wind speeds, including urban and suburban areas where large turbines are impractical or restricted.

Its efficiency, low maintenance needs, and minimal land use make it a compelling alternative to photovoltaic (solar) systems in certain scenarios. In fact, one Vortex turbine can offset or even eliminate the need for rooftop solar panels, particularly in areas where sunlight is inconsistent or rooftop space is limited.

This innovative approach is poised to support decentralized energy production, offering clean and reliable power for individual homes, businesses, and off-grid applications. As the world continues its transition toward more sustainable energy sources, such advancements in wind technology represent a crucial step forward in achieving broader climate and energy goals.

The post 25,000 kWh of Free Energy: Innovative 24-Meter Wind Turbine Outperforms Solar Panels – ECOticias.com, The Green Journal appeared first on .

A recent study published in Nature presents a comprehensive examination of the zero-point electron-phonon (EP) renormalization effects on key electronic properties of solids, such as the bandgap, electron mass enhancement, and spectral functions. These quantum effects, which arise even at absolute zero temperature due to zero-point vibrations, significantly influence the electronic behavior of materials. However, accurately predicting and validating these effects has posed a persistent challenge in condensed matter physics.

The research utilizes state-of-the-art theoretical and computational methods, combining many-body perturbation theory with advanced calculations of EP interactions. This approach allows for precise quantification of zero-point corrections in a wide range of materials, establishing benchmarks for theoretical predictions.

One of the report’s central findings is the significant impact of zero-point EP renormalization on the fundamental bandgap of semiconductors. The study confirms that the electron-phonon interaction can reduce the bandgap by up to several tenths of an electron volt, depending on the material. This renormalization is crucial for understanding and predicting optical and transport properties, especially in low-temperature applications, optoelectronics, and photovoltaics.

In addition to bandgap shifts, the researchers analyzed mass enhancement factors, which describe the effective mass of electrons modified by EP interactions. These factors influence charge carrier mobility and are essential for assessing performance in electronic devices. The study demonstrates excellent agreement between theoretical predictions and experimental measurements derived from angle-resolved photoemission spectroscopy (ARPES) and other spectroscopic techniques.

Furthermore, the study delves into the EP self-energy and spectral functions—quantities that characterize electron lifetimes and broadenings due to interactions with phonons. By comparing theoretical predictions with high-resolution experimental data, the research validates the predictive power of modern computational models, enhancing confidence in their use for material discovery and design.

Overall, the work represents a significant milestone in bridging experimental observations with first-principles theory, offering verified methodologies to accurately account for quantum nuclear effects in electronic structure calculations. These insights are expected to guide the development of more efficient electronic and optoelectronic materials, especially where quantum vibrational effects play a pivotal role.

The post Verification and Validation of Zero-Point Electron-Phonon Effects on Bandgap Renormalization, Mass Enhancement, and Spectral Functions – *Nature* appeared first on .