Tiny Quantum Engines Reveal Hidden Energy in 'Waste Heat'

Topic: Physics

Scientists at the University of Basel have developed a new way to describe how tiny quantum machines use energy. They found that some of the energy leaving these machines can still be used for useful work, not just as waste heat.

Imagine a machine made from only an atom and light particles. This is what scientists call a quantum engine. These engines take in energy, transform it, and release it. But how do we understand this process? Two branches of physics, thermodynamics and quantum physics, were developed for different purposes. Thermodynamics explains how large machines convert and transfer energy, while quantum physics focuses on atoms and subatomic particles.

Researchers at the University of Basel in Switzerland have introduced a new theoretical framework that makes these two fields work consistently together. They used a tiny system built from an atom and light particles to test their approach. The atom was placed in a cavity between two mirrors, where it could absorb and emit light particles. A laser supplied additional photons to the cavity.

The researchers found that some of the energy carried by the escaping light can still be used for useful work on another quantum system. They also discovered that their new approach correctly describes how quantum effects reduce fluctuations in the emitted light particles.

Why It Matters

This discovery could lead to more efficient use of energy in quantum technologies, which are crucial for India's growing tech industry. It also shows how scientists can find useful resources in what was previously considered waste heat.

Key Facts

• Researchers at the University of Basel developed a new theoretical framework that combines thermodynamics and quantum physics.
• The framework uses a tiny system built from an atom and light particles to test its approach.
• Some of the energy carried by escaping light can still be used for useful work on another quantum system.
• The researchers' new approach correctly describes how quantum effects reduce fluctuations in emitted light particles.
• This discovery could lead to more efficient use of energy in quantum technologies.

Key Terms

Thermodynamics

The study of how energy is converted and transferred between systems.

Quantum Physics

The study of the behavior of atoms and subatomic particles.

Implications

This discovery could lead to more efficient use of energy in quantum technologies, which are crucial for India's growing tech industry. It also shows how scientists can find useful resources in what was previously considered waste heat.