What Is Quantum Computing? What Are the Principles of Quantum Computing?

What Is Quantum Computing?

The field of computer science known as “quantum computing” is founded on the ideas of quantum theory. The actions of energy and matter at the atomic and subatomic levels are explained by quantum theory.

Electrons and photons are used in quantum computing. The use of quantum bits, or qubits, makes it possible for these particles to simultaneously hold two states—a 1 and a 0.

Theoretically, a network of qubits can “exploit the interference between their wave-like quantum states to perform calculations that might otherwise take millions of years.”

Modern classical computers store data in bits encoded as a series of electrical pulses (1s and 0s). As a result, they can’t handle as much data as quantum computers can.

Quantum Computing: What You Need to Know

In the 1980s, researchers began developing quantum computers. Some computer problems were found to be more amenable to quantum algorithms than their classical analogs.

With its ability to sift through vast amounts of data, quantum computing can help us find answers to difficult issues. Quantum computers, in contrast to classical computers, use qubits to store information rather than binary digits (0s and 1s). Quantum bits store information in a multidimensional superposition of the zero and one states.

Companies of prominence are interested in this technology because of its enormous computational capacity and the scale of the predicted market for its utilization. IBM, Microsoft, Google, D-Waves Systems, Alibaba, Nokia, Intel, Airbus, HP, Toshiba, Mitsubishi, SK Telecom, NEC, Raytheon, Lockheed Martin, Rigetti, Biogen, Volkswagen, and Amgen are among the list of companies involved.

Some Applications and Advantages of Quantum Computing

Some Applications and Advantages of Quantum Computing

Security, finance, military affairs and intelligence, drug design and discovery, aircraft design, utilities (nuclear fusion), polymer design, machine learning, artificial intelligence (AI), Big Data search, and digital manufacturing are all areas where quantum computing could make significant contributions.

The usage of quantum computers has the potential to enhance the safety of exchanging sensitive data. Or, to make radars better in detecting airplanes and missiles. Quantum computing is also predicted to aid in environmental protection and water purification through the use of chemical sensors.

Some possible advantages of quantum computers are listed below.

  • Quantum computing could help banks and other financial organizations improve the quality and efficiency of the investment portfolios they create for their retail and institutional clients. Better trading simulations and enhanced fraud detection would be fruitful areas of research and development.
  • Quantum computing has the potential to aid in the discovery of novel pharmaceuticals and the design of genetically specific medicinal treatments. It could also fuel cutting-edge DNA analysis.
  • Quantum computing can aid in the development of improved data encryption and methods of using light signals to detect attackers in the system, both of which contribute to improved online security.
  • Aircraft and traffic planning systems can be made more effective and secure with the use of quantum computing.

What Are the Principles of Quantum Computing?

A quantum computer is one that operates according to quantum theory. Superposition, entanglement, and decoherence are just a few of the new words that need to be added to your vocabulary in order to completely grasp quantum principles. Let’s break down and analyze these guiding ideas.


According to the principle of superposition, it is possible to add two or more quantum states to obtain a new valid quantum state, much like the addition of waves in classical physics. On the flip side, any quantum state can also be represented as the sum of two or more additional states. Due to the inherent parallelism of quantum computers, millions of operations can be processed simultaneously by superposing qubits.


When two systems are entangled, information about one system immediately reveals information about the other system, regardless of how far apart they are. Quantum computers may infer information about one particle from data collected on a different particle.

For instance, if one qubit is spinning upward, they can guarantee that the other will be spinning downward, and vice versa. Because of quantum entanglement, quantum computers can quickly tackle difficult problems.

The collapse of the wave function into a definite value (zero or one) is what happens when a quantum state is measured. The qubit behaves like a conventional bit while in this “classical” or “known” state. Quantum bits (qubits) can be entangled if their states can be correlated with other qubits.


The loss of a qubit’s quantum state is known as decoherence. The collapse of the qubits’ quantum state can be caused by environmental variables like radiation. Designing the numerous elements that seek to delay the decoherence of the state, such as making specialized structures that shield the qubits from external fields, is a significant engineering difficulty in producing a quantum computer.

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