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

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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