What this work contributes
Separates reciprocal and nonreciprocal contributions to nanoparticle heat transfer and force. It finds passivity-based limits relevant to proposed heat engines, while identifying regimes of potentially substantial forces relative to nanoparticle weight.
Where the evidence stops
A force larger than a nanoparticle's weight does not establish vehicle-scale lift, favorable system mass, or net thrust of an isolated system. The abstract reports theoretical results, not a constructed transport device.
Keep the conditions with the result
- Measured / modeled quantity
- Calculated heat transfer and propulsion forces involving nanoparticles
- Reported scale
- Model-dependent force can exceed the particle's gravitational force; no experimentally measured thrust reported
- Conditions
- Specified nonreciprocal responses, particle/environment geometry and thermal conditions; passivity constrains heat-engine efficiency.
- Evidence context
- Theory — Henkes et al., 2025
- Design use
- Reproduce one fully specified numerical case before extrapolation. A particle-weight comparison does not establish whole-system lift, practical power or vehicle-scale thrust.
Original source
Laila Henkes, Kiryl Asheichyk, Matthias Krüger. Propulsion force and heat transfer for nonreciprocal nanoparticles. Physical Review B 111, 035441 (2025).
DOI: 10.1103/PhysRevB.111.035441
How we use it
This record belongs to Driven & thermal fields. Its evidence label describes the cited work, not the maturity of a Metric Flight device. Follow the original methods, corrections and conditions before transferring a result to a different geometry or scale.
Editorial note reviewed 19 October 2026. AI assisted research discovery and synthesis. Citation metadata and claims were checked against primary publication or institutional records; full-text access varies. Read the source for the complete method.