Tag

Thermodynamics

All articles tagged with #thermodynamics

science22 days ago•7 min saved

Quantum Control Reverses the Arrow of Time in the Lab

Researchers developed measurement-based quantum control that, by combining measurements, feedback, and tailored control fields, can stretch or reverse the apparent arrow of time in quantum systems, creating time-reversed trajectories and a measurement-powered engine that can extract energy from monitoring; the work, published in Physical Review X, points to new methods for quantum state preparation and energy management with platforms like superconducting qubits.

via SciTechDaily|

#measurement #quantum #quantum-control

science1 month ago•3 min saved

Topology Reveals Global Shape of Black Hole Thermodynamics

Black holes are not just features of their accretion disks: they possess intrinsic temperature and entropy, and topology is used to classify their thermodynamic behavior. By identifying special zero points in the thermodynamic landscape and assigning them topological charges, physicists derive a global fingerprint that distinguishes different black-hole types (such as Schwarzschild vs. Reissner–Nordström) while remaining robust to changes in mass, charge, or spin; this approach links stability and state transitions to invariant properties and could illuminate paths toward quantum gravity, with implications for light rings and spacetime bending.

via Universe Today|

#astrophysics #black-holes #quantum-gravity

science2 months ago•4 min saved

Neil deGrasse Tyson: After death, your energy returns to Earth or travels to the stars

Astrophysicist Neil deGrasse Tyson explains on Startalk that after death your body's energy isn’t destroyed: burying you returns energy to the Earth via microbes, while cremation turns it into heat radiated into space, potentially reaching Alpha Centauri. He frames this in terms of the first law of thermodynamics and notes a debate between eco-friendly burial versus cremation.

via New York Post|

#burial #cremation #death

physics-and-chemistry2 months ago•16 min saved

New Theory Reveals Why a Quantum Gas Keeps Its Cool Under Energy Kicks

Physicists have built a theoretical framework linking interparticle interaction strength to the momentum-kick amplitude in a strongly interacting one-dimensional quantum gas, showing a critical regime where external energy stops being absorbed due to dynamical localization. The model explains why the gas resists heating, suggests the mechanism may apply to other quantum systems, and sets the stage for future experimental tests to explore finite-size and thermodynamic-limit behavior.

via Gizmodo|

#dynamical-localization #energy-absorption #many-body-physics

science2 months ago•6 min saved

Rethinking Reality: A Fresh Take on Boltzmann Brains and Memory

New research reexamines the Boltzmann brain paradox, arguing that our memories and the arrow of time arise from assumptions about the past; the team offers a framework that separates physical laws from interpretive choices to better assess whether memories reflect a real history.

via SciTechDaily|

#boltzmann-brain #entropy #memory

planet-earth3 months ago•72 min saved

Experts challenge deep-sea 'dark oxygen' claim, call for retracting 2024 study

A 2024 study claimed that deep-sea polymetallic nodules could generate oxygen in total darkness via seawater electrolysis, but a December 2025 opinion article from marine scientists and electrochemists argues the results are flawed and likely artifacts, citing improper chamber ventilation, absence of negative controls, missing hydrogen data, and a thermodynamics violation; the authors defend their work and plan a spring CCZ expedition to test the phenomenon, but many experts say the study should be retracted unless the evidence is revised.

via Live Science|

#dark-oxygen #deep-sea #deep-sea-mining

science5 months ago•5 min saved

Correlated quantum engines defy Carnot limits at the atomic scale

University of Stuttgart researchers demonstrate that at atomic scales, quantum correlations between particles allow correlated quantum engines to exceed the traditional Carnot efficiency limit, by harvesting work from correlations in addition to heat; this generalizes thermodynamics for tiny, strongly correlated systems and could enable ultra-efficient nanoscale motors and quantum devices.

via ScienceDaily|

#carnot-limit #nanoscale #quantum-correlations

science5 months ago•36 min saved

Thermodynamics Reimagined: A New Framework for Non‑Equilibrium Energy

Researchers at West Virginia University have expanded the first law of thermodynamics to describe energy conversion in non‑equilibrium systems by incorporating additional quantitative descriptors beyond density and temperature, enabling a more complete account of energy flow in complex substances such as plasmas, chemistry, circuitry, and quantum systems; the breakthrough could reshape how scientists model energetic processes across multiple fields.

via Yahoo|

#energy #non-equilibrium #physics

science6 months ago•3 min saved

Old Physics Law Fails at Atomic Level

Physicists have demonstrated that the classical Carnot efficiency limit breaks down at the atomic scale when quantum correlations are involved, allowing microscopic heat engines to surpass traditional efficiency limits and paving the way for highly efficient quantum motors.

via SciTechDaily|

#atomic-scale #carnot-efficiency #heat-engines

science6 months ago•16 min saved

Aeonophiles' Discovery Broadens Life's Definition

The article discusses the discovery of aeonophiles, ultra-long-lived microbes living deep beneath Earth's surface, which challenge traditional notions of lifespan and life itself, and have significant implications for understanding life's diversity, evolution, and potential existence on other planets.

via Aeon|

#aeonophiles #earths-subsurface #longest-living-organisms

science7 months ago•5 min saved

Scientists Develop 7 New Ceramic Materials by Removing Oxygen

Penn State scientists created seven new high-entropy oxide ceramics by removing oxygen during synthesis, stabilizing metals like iron and manganese in structures previously unattainable, using thermodynamic principles and machine learning to guide the process, with potential applications in energy, electronics, and coatings.

via SciTechDaily|

#ceramic-materials #high-entropy-oxides #materials-synthesis

science8 months ago•3 min saved

Microscopic Engine Surpasses Sun's Heat, Challenges Physics

Physicists have created a microscopic Stirling engine using a silica particle levitated in electric fields, capable of simulating temperatures up to 13 million kelvin, providing insights into thermodynamics at extreme scales and potential applications in understanding biological processes and particle behavior in complex environments.

via ScienceAlert|

#biological-processes #high-temperatures #microscopic-engine

science8 months ago•5 min saved

Tiny Particle Engine Achieves Sun-Temperature Heat

Scientists at King's College London have created the world's hottest microengine, operating at temperatures hotter than the sun's core, which could revolutionize our understanding of thermodynamics and aid in developing treatments for diseases by improving knowledge of protein folding.

via Interesting Engineering|

#kings-college-london #microengine #paul-trap

science9 months ago•2 min saved

Tiny Engine Outshines Sun's Corona in Heat

Researchers have created the smallest and hottest engine ever, achieving temperatures of 10 million Kelvins inside a microscopic particle, which challenges traditional thermodynamics and offers potential for simulating microscopic phenomena like protein folding.

via Gizmodo|

#kings-college-london #microscopic-engine #quantum-physics

science9 months ago•3 min saved

Scientists Revolutionize Atomic Engines and Quantum Mechanics at the Nanoscale

A German research team has demonstrated that the classical Carnot principle, which limits the efficiency of heat engines, does not apply at the atomic scale due to quantum correlations, potentially enabling the development of ultra-efficient quantum engines and nanobots.,

via Interesting Engineering|

#carnot-principle #efficiency #nanotechnology