Quantum Computing

  • Quantum computing takes advantage of the strange ability of subatomic particles to exist in more than one state at any time. Due to the way the tiniest of particles behave, operations can be done much more quickly and use less energy than classical computers.
  • In classical computing, a bit is a single piece of information that can exist in two states – 1 or 0. Quantum computing uses quantum bits, or ‘qubits’ instead. These are quantum systems with two states. However, unlike a usual bit, they can store much more information than just 1 or 0, because they can exist in any superposition of these values.


How quantum computers revolutionize computing:-

  • While today’s computers struggle or are unable to solve some problems, these same problems are expected to be solved in seconds through the power of quantum computing.
  • It’s predicted that artificial intelligence, and in particular machine learning, can benefit from advances in quantum computing technology
    • Quantum computing algorithms allow us to enhance what’s already possible with machine learning.
  • Quantum computers are better equipped to solve sequential problems efficiently. The power they give businesses and even consumers to make better decisions might just be what’s needed to convince companies to invest in the new technology when it becomes available.
  • Quantum computers will allow for quick analysis and integration of our enormous data sets which will improve and transform our machine learning and artificial intelligence capabilities.
  • Quantum computers operate on completely different principles to existing computers, which makes them really well suited to solving particular mathematical problems, like finding very large prime numbers.
    • Since prime numbers are so important in cryptography, it’s likely that quantum computers would quickly be able to crack many of the systems that keep our online information secure.
  • In quantum computing qubit is the conventional superposition state and so there is an advantage of exponential speedup which is resulted by handle number of calculations.
  • The other advantage of quantum computing is even classical algorithm calculations are also performed easily which is similar to the classical computer.



  • The main disadvantage of computing is the technology required to implement a quantum computer is not available at present. The reason for this is the consistent electron is damaged as soon as it is affected by its environment and that electron is very much essential for the functioning of quantum computers.
  • This is due to the fact that the coherent state, fundamental to a quantum computer’s operation, is destroyed as soon as it is measurably affected by its environment. Attempts at combating this problem have had little success,
  • The research for this problem is still continuing and the effort applied to identify a solution for this problem has no positive progress.


Quantum computers are machines that use the properties of quantum physics to store data and perform computations. This can be extremely advantageous for certain tasks where they could vastly outperform even our best supercomputers

Classical computers, which include smartphones and laptops, encode information in binary “bits” that can either be 0s or 1s. In a quantum computer, the basic unit of memory is a quantum bit or qubit.

Qubits are made using physical systems, such as the spin of an electron or the orientation of a photon. These systems can be in many different arrangements all at once, a property known as quantum superposition. Qubits can also be inextricably linked  together using a phenomenon called quantum entanglement. The result is that a series of qubits can represent different things simultaneously.


What is quantum supremacy?

It means only that researchers have been able to use a quantum computer to perform a single calculation that no conventional computer, even the biggest supercomputer, can perform in a reasonable amount of time.