Quantum physics
Zero-Point Energy
The lowest possible energy of a quantum system, which is never zero — even empty space seethes with quantum fluctuations. This vacuum energy is a real, measured effect (the Casimir force), and its possible connection to the accelerating expansion of the Universe is one of the deepest open problems in physics.
Highlights
- ›Even empty space is never truly empty
Related physics & astronomy
Across fundamental physics
Knowledge connections
- Associated withVacuum Energy
- Associated withThe Heisenberg Uncertainty Principle
- Associated withDark Energy
- Associated withThe Cosmological Constant (Λ)
- Associated withVacuum Energy
Sources
The primary and reference sources this topic draws on.
- NASANational Aeronautics and Space Administration
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.