# Scientists spot 1st gamma-ray eclipses from strange 'spider' star systems

26-08-2023

10:23 AM

1 min read

### Overview:

#### An international team of scientists recently made a breakthrough in retaining the quantum coherence of quantum dot spin qubits.

**About Quantum Coherence:**

- It deals with the
**idea that all objects have wave-like properties.** - It states that,
**if an object's wave-like nature is split in two, then the two waves may coherently interfere with each other**in such a way as**to form a single state**that is a**superposition of the two states.** - This concept of superposition is
**famously represented by Schrödinger's cat**, which is both dead and alive at the same time when in its coherent state inside a closed box. - It lies at the
**heart of quantum computing**, in which a qubit is in a superposition of the "0" and "1" states.

**What is Quantum Entanglement?**

- It means that
**aspects of one particle of an entangled pair depend on aspects of the other particle,**no matter how far apart they are or what lies between them. - Like coherence, quantum entanglement also plays an essential role in quantum technologies.

**What is the principle of Superposition of Waves?**

- It states that
**when two or more waves overlap**in space, the**resultant disturbance****is**equal to the**algebraic sum**of the individual disturbances.

**What is a Qubit?**

- A qubit (or quantum bit) is the
**quantum mechanical analogue of a classical bit.** - A classical binary bit can only represent a single binary value, such as 0 or 1.
- A
**qubit, however, can represent a 0, a 1, or any proportion of 0 and 1 in superposition**of both states. - In
**quantum computing**the information is**encoded in qubits.**

### Q1) What is Quantum computing?

Quantum computing is a process that uses the laws of quantum mechanics to solve problems too large or complex for traditional computers. Quantum computers rely on qubits to run and solve multidimensional quantum algorithms.

**Source: **__Researchers find new way to improve storage time of quantum information__