Alejandro Jenkins

Out today on the Arxiv: my work with Robert Alicki and Gabriela Barenboim on the "Quantum thermodynamics of de Sitter space". This longer paper is accompanied by another shorter paper on the consequences for cosmology. 1/2 arxiv.org/abs/2307.04800

My art history research came up this morning at the Royal Society...

"I sing not, siren-like, to tempt; for I / Am harsh". - Donne

The curator of collections at Trinity, Pola Durajska, will argue the same at a conference on "Scientific portraits and portraits for science" at the Royal Society on 20 March. royalsociety.org/science-events…

In this preprint I argue that there's a portrait of a young Isaac Newton hiding in plain sight in the collection of Trinity College, Cambridge. #IsaacNewton #Historyofart arxiv.org/abs/2603.01280

"Can we get rid of this ayatollah T-shirt? Khomeini died years ago." "But, Marge, it works on any ayatollah-- Ayatollah Nakhbadeh, Ayatollah Zahedi. As we speak, Ayatollah Razmara and his cadre of fanatics are consolidating their power." "I don't care who's consolidating their power."

Newton's bucket experiment: I'm hoping to turn this into a science toy to rival 'Newton's cradle'. 😃 youtu.be/Tu4oUA_achY?si… via @YouTube

The simplest valveless pulse-jet engine: A Mason jar with a hole in the lid, with a bit of pure methanol at the bottom as fuel, and immersed in a bath of ice water to keep the heat from causing the jar to break apart. #JetPropulsion #ThermoAcoustic #SelfOscillation

Richard Trevithick en Costa Rica youtu.be/ZU5hQMy_-CE?si… via @YouTube

I still think of Carlos as a kid who'd aced my thermodynamics course and who'd stop by my office to talk about how the wind raises waves on the sea and the maintenance of the Chandler wobble. He's now a professor at Stanford. 🧐

Thermal self-oscillation! My favorite physical effect. 😄🥶🥵 @chen48721 instagram.com/reel/DT3F2YcDp…

During World War II, my grandfather single-handedly brought down ten German airplanes. After that the Luftwaffe got rid of him as a mechanic, due to his incompetence.

Today's 'orthodox' Newtonmas (i.e., Isaac Newton's birthday in the Gregorian calendar). So here are some pictures of Newton's monument in the Trinity College chapel. Note how the sculptor worked to give the marble the visual texture of a wrinkled satin gown. #IsaacNewton

A thermodynamic cycle for the X-ray corona in a black-hole binary system. Source: arxiv.org/abs/2512.09026

Hoy a las 4:30 pm en el Auditorio de Físico-Matemáticas (FM-001) de la UCR, intentaré explicar algo que me llevó varios años entender: ¿Cómo está actualmente definido el kilogramo?

"Non-Equilibrium Thermodynamics of Black-Hole Coronae: QPOs, Turbulence, and Jets" arxiv.org/abs/2512.09026

Sacred to the memory of Captain Robert Falcon Scott, CVO (1868 - 1912). 🥶

La @ANC_CR invita a la conferencia presencial: “Premio Nobel de física 2025: Preguntas y perspectivas” Dr. Alejandro Jenkins Fecha: 3 de diciembre, 2025. Hora: 2:00 P.M. Lugar: Auditorio de la Plaza de la Autonomía, (UCR), Sede Rodrigo Facio. Live: facebook.com/Academia-Nacio…

Mañana: Conferencia presencial: “Premio Nobel de física 2025: Preguntas y perspectivas”. Miércoles 3 de dic. 2025 en el Auditorio de la Plaza de la Autonomía de la UCR, 2:00 p.m. Transmisión por Facebook Live: facebook.com/Academia-Nacio…

En el marco del Año Internacional de la Ciencia y Tecnología Cuánticas, hablaré este martes sobre la "Observación de efectos cuánticos macroscópicos en circuitos con uniones de Josephson", tema del Premio Nobel de Física de este año. #IYQ2025 #QuantumYear

Here's a short video on an old physics puzzle: Finding the center of mass of a ruler. youtu.be/rFLYgcIxiIo?si… via @YouTube