The concept of twistors introduces a new kind of curved twistor, which is essential for understanding complex solutions in physics, but it also leads to inherent confusion in the theory.

Twistor theory originated from my realization that light rays can be represented by points on a five-dimensional boundary, allowing for a global description of space-time.

Twistor theory can be applied in complex space-time, particularly useful for quantum theory involving wave functions.

Twistor theory, which I started in 1963, has had many developments and has spread interest in different areas of physics.

The positive-negative frequency idea in twistor theory was something I learned from Engelbert Schuching, emphasizing the importance of splitting field amplitudes in quantum field theory.

A qubit, which represents a property of particles called "spin," can exist in a superposition of states, unlike classical objects that are either one state or another.

There's a fundamental connection between symmetry and conservation laws in physics, which holds true in both classical and quantum mechanics.

The spin of a spin-half particle can be measured, but you cannot ascertain its state without performing a measurement.

The double-slit experiment illustrates the counterintuitive nature of quantum mechanics, showing that particles like electrons can exhibit wave-like behavior and interfere with themselves.