The concept of "quantum hair" refers to the idea that black holes may possess additional quantum properties beyond their mass, charge, and angular momentum. These additional properties, if they exist, would allow black holes to carry unique information and potentially resolve the long-standing information paradox associated with them.
Hawking radiation, on the other hand, is a theoretical prediction made by physicist Stephen Hawking. According to his work, black holes can emit particles over time due to quantum effects near the event horizon. This radiation is thought to be thermal and does not carry any information about the black hole's specific quantum state or the matter that fell into it.
While the concept of quantum hair and Hawking radiation both relate to quantum effects near black holes, they are distinct ideas. Quantum hair refers to potential additional quantum properties of black holes, while Hawking radiation is a prediction about the emission of particles from black holes.
It's important to note that the nature of black holes and the behavior of quantum systems near them are active areas of research, and our understanding is still evolving. there is no definitive consensus on whether black holes possess quantum hair or the exact mechanism behind the information loss or preservation in black holes. Further theoretical and experimental investigations are required to deepen our understanding in this fascinating field.