Quantum Entanglement

Uncover the secrets of particles intricately linked across vast distances, challenging the norms of classical physics

Ready for a cosmic rendezvous, fellow physics enthusiasts?

This newsletter includes:

1. Comprehensive details about quantum entanglement, unraveling the intriguing phenomena of particles connected across vast distances.

2. Exploration of real-world applications, demonstrating how quantum entanglement is harnessed in advanced technologies and scientific breakthroughs.

What is Quantum Entanglement?

Imagine having two identical boxes—one with a pen and the other with a pencil. When you open one box and find the pen, you can be sure that the other box contains the pencil. Conversely, if it contains the pencil, then the other box must have the pen. We can say that the pen and the pencil are entangled.

Photo by Dan Cristian Pădureț on Unsplash

As we know, electrons exhibit spin. Similar to the Schrödinger cat thought experiment we discussed in a previous post, electrons exist in a superposition of spins—both upward and downward spins. When electrons interact or share spatial proximity, their spin states can become entangled. Upon measurement (collapse of the wave function), if one electron has a positive or upward spin, the other will automatically have a downward spin. Now, when separated, if we were to measure the spin state of one electron, regardless of the distance between them, we would be able to determine the spin state of the other electron. This is known as the Quantum entanglement of electrons.

According to classical physics, information can not be transferred faster than the speed of light but with quantum entanglement information is being transferred even faster than the speed of light irrespective of the distance.

Real-world Applications:

Quantum Cryptography:

This system ensures complete security, making it impossible to be compromised without the sender's or receiver's knowledge. The encoded data in a quantum state cannot be copied or viewed without alerting the involved parties.

Entanglement Enhanced Microscope:

By employing entangled photons, this microscope significantly enhances information gathering. Each entangled photon provides extensive information about its pair, maximizing the microscope's capabilities.

Quantum Teleportation:

In this process, information is teleported, not matter. It involves the transmission of quantum states from one location to another, showcasing the unique principles of quantum mechanics.

We will discuss the uses and the future of quantum entanglement in detail in later posts

Quote of the Week: Success is not final; failure is not fatal: it is the courage to continue that counts." - Winston Churchill.

Keep dancing through the cosmos of knowledge! Until next time, stay curious.