In this lecture we will use quantum computing to understand fundamental
questions in other aspects of physics, which in turn help us understand the physical limits of quantum
information processing. I will explain Einstein's EPR paradox, including why entanglement does not enable
any influences to travel faster than the speed of light. Then I will present the classical Maxwell's Demon
thought experiment, whereby a hypothetical demon appears to be able to reverse the arrow of time. I will show
how it can be mapped onto qubits in a quantum computer, and discuss its implications for the energetics of quantum
computing and quantum thermodynamics. Finally, I will explain how quantum mechanics can help us resolve time-travel
paradoxes, and how the existence of time-loops would unlock computing power even more powerful than quantum computing.
This session will provide the audience with interdisciplinary ways to understand and explain quantum computing, that
they can tailor to the interests of their own audiences or connect with their existing educational syllabuses. It
will also demonstrate topics of frontier quantum research, and help them understand in what sense quantum computers
are more powerful than classical ones. The lecture will cover similar material (but in a more concise and simplified
form) to my videos on the EPR paradox, Maxwell's Demon and time-travel in the
Quantum Paradoxes playlist.
here.