The quantum arrow of time can be reversed, physicists show
Yahoo • • science
Key Points:
- New theoretical research demonstrates a method to reverse the arrow of time in quantum systems by using a control sequence called a Hamiltonian to flip-flop events as if time were flowing backward.
- The study, led by physicist Luis Pedro García-Pintos and published in Physical Review X, uses computer simulations to show how knowledge of a quantum system's initial and measured states allows for time reversal by instantaneously reverting the system.
- This approach mimics Maxwell’s demon by selectively controlling quantum states, potentially enabling the recovery of energy from quantum measurements and powering other processes.
- Reversing time on a quantum level could help address quantum decoherence, a key challenge in quantum computing, by restoring quantum behavior lost to environmental interactions, thereby improving quantum technology development.
- While currently theoretical, these findings could be experimentally tested and pave the way for advancements in quantum information preservation and energy efficiency.
