A thought experiment called Schrödinger's cat illustrates the measurement problem. A mechanism is arranged to kill a cat if a quantum event, such as the decay of a radioactive atom, occurs.

The lack of a precise principle to decide which evolution will arise has created a constellation of puzzles known at the "measurement problem." The best known example is "Schroedinger's cat," a thought …

Jul 25, 2016 · For this reason, the interpretational issues have come to be referred to as the measurement problem. In the first decades of discussion of the foundations of quantum mechanics, it …

May 22, 2023 · At the heart of this bizarreness is what’s called the measurement problem. Standard quantum mechanics accounts for what happens when you measure a quantum system: essentially, …

Aug 14, 2025 · The measurement problem remains as perplexing today as it was a century ago when quantum mechanics first emerged. We’ve built entire industries on quantum technology—computers, …

This formulation corresponds to a projective measurement (also known as a projection-valued measure, or PVM), where the outcome on is associated with the projection operator |on on|.

Mar 23, 2025 · Despite significant progress in understanding quantum phenomena, the measurement problem remains one of the most profound questions in physics and philosophy, inviting further …