What phenomenon occurs at absolute zero that affects all particles?

At absolute zero, which is 0 Kelvin or -273.15 degrees Celsius, all classical motion of particles theoretically comes to a halt. However, particles still retain a form of energy known as zero point energy. This phenomenon arises because quantum mechanics dictates that particles cannot be at rest; they possess a fundamental level of energy even at absolute zero due to the principles of quantum uncertainty.

Zero point energy is a minimal energy state that is a consequence of the Heisenberg Uncertainty Principle, signifying that particles have inherent fluctuations and cannot occupy a state of absolute stillness. This means that even at the lowest possible temperature, particles still exhibit a degree of motion. This concept is crucial in understanding quantum mechanics and the behavior of matter at extremely low temperatures. In contrast, the other options do not accurately describe the behavior of particles at absolute zero.