A quantum phase transition is a type of phase transition that occurs at zero temperature in a quantum system, where the behavior of the system changes abruptly as a result of changes in a quantum parameter, such as the strength of an applied magnetic field. Unlike classical phase transitions, which occur due to changes in temperature or pressure, quantum phase transitions are governed by the principles of quantum mechanics, such as entanglement and superposition. Quantum phase transitions have important applications in condensed matter physics and quantum computing.\n
What is a quantum phase transition?