Physicist Jonathan Oppenheim from University College London is challenging the commonly held belief that gravity must be quantized. For almost a century, physicists have attempted to create a unified theory of gravity and quantum mechanics by quantizing gravity, but have not yet succeeded. Oppenheim believes that gravity cannot be squeezed into a quantum box and argues for the possibility of a hybrid theory that unifies classical gravity and quantum mechanics. He has made a bet with colleagues in the field, offering 5,000-to-1 odds that space-time is not quantized. Oppenheim’s research on quantum-classical hybrid theories seeks to find a deeper understanding of gravity that is neither purely quantum nor classical.
https://www.quantamagazine.org/the-physicist-who-bets-that-gravity-cant-be-quantized-20230710/