Schrödinger's Cat Paradox: What the Thought Experiment Really Says

Schrödinger's cat paradox, formulated in 1935, does not claim that reality is a product of human consciousness, but rather points to the problem of measuring a quantum system. Physics still debates whether observation collapses the wave function or whether multiple worlds exist.

## What Schrödinger's experiment says

In **1935**, Austrian physicist **Erwin Schrödinger** proposed a thought experiment. A cat is placed in a box with a mechanism that can kill it depending on the decay of a radioactive atom. According to quantum mechanics, the atom is in a superposition of states until it is measured. That would leave the cat both alive and dead at the same time. Schrödinger raised this as a critique, not as a description of reality.

Superposition is not a quirk of the cat. It is the normal behavior of particles such as the electron, which can be in two states at once until it interacts with its environment. The problem arises when moving from the microscopic world to the macroscopic one.

## Wave collapse and the role of the observer

The **Copenhagen interpretation**, dominant since the 1920s, holds that the wave function collapses when measured. Before measurement there is no defined value. This does not imply that consciousness creates reality. The collapse is produced by any physical interaction; no human looking is required.

Physicist **Richard Feynman** popularized the path integral formulation in the 1940s. In it, a particle does not trinc a single trajectory; all possible ones are summed. This gave rise to the idea that multiple alternative histories exist.

## Many worlds and shared reality

The **many-worlds interpretation**, proposed by **Hugh Everett** in **1957**, eliminates collapse. Each measurement branches the universe into branches where all possible outcomes occur. There is no single real world with the others discarded. All are equally real, but they do not communicate with one another.

This answers the question of whether each individual produces their own collapse. In the Copenhagen interpretation, any observer obtains the same result when measuring the same thing. Reality is intersubjective, not private. In many worlds, each branch has its own observer. No interpretation has been experimentally confirmed to this day.

## Why this matters beyond physics

The paradox is often used to draw conclusions about consciousness or metaphysics. That goes beyond what physics can assert. The thought experiment does not prove that reality is a byproduct of the mind. It only shows that quantum mechanics breaks with classical intuition.

Experiments with isolated particles, such as those carried out with **photons** in the 1980s by **Alain Aspect**, confirm quantum entanglement. But they do not confirm that consciousness collapses the wave. The boundary between the quantum and the classical remains an open problem.