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What is Quantum Physics?


You may be familiar with the concept of "Schrödinger's cat😻." Schrödinger, a physicist, proposed a theoretical experiment in which a cat is placed in a chamber with a small amount of radioactive substance. The substance may or may not decay, triggering a poison that would kill the cat. Until the chamber is opened, the cat exists in a state of uncertainty, being both dead and alive simultaneously.

How does Quantum Physics differ from Classical Physics?

 

This thought experiment is often used to explain the fundamental principles of quantum physics, which describes the behaviour of matter at the atomic and subatomic levels. Quantum physics differs from classical physics, which describes the world at the macroscopic level, in more ways than just scale. Quantum physics often challenges our intuitive understanding of how the world works.


SUPERPOSITION IN QUANTUM PHYSICS:

In classical physics, an object is assumed to be in a single definite state at any given time (e.g., a coin can only land on either heads or tails). However, in quantum physics, particles can exist in multiple states simultaneously, a phenomenon known as "superposition." The analogy of Schrödinger's cat is used to illustrate this concept, although there are differing interpretations among theorists. One common interpretation is that superposition is expressed as a set of probabilities that collapse into a single value upon observation, which is why the cat is considered both dead and alive until observed.


ENTANGLEMENT IN QUANTUM PHYSICS:

Another intriguing aspect of quantum physics is "entanglement." In classical physics, two objects separated in space are expected to have independent states or properties. In contrast, quantum physics allows for particles to be "entangled" in a way that their states cannot be described independently of each other. Actions performed on one entangled particle can instantaneously affect the state of the other, regardless of the distance between them. Schrödinger's cat analogy is sometimes used to illustrate this phenomenon, with some theorists interpreting the fate of the cat as entangled with the observer's state, i.e., whether or not someone is observing.

Please note that Schrödinger's cat is purely a theoretical concept and not something that is actually carried out in real life. It serves as a thought experiment to explore the peculiarities of quantum physics.


Read More:

1.) What is Quantum Entanglement

2.) Quantum Computing- Interesting facts

3.) Types of Quantum Computers


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