Quantum Computing, Features and Demerits

by | 10 Apr, 2023 | Technology

What is Quantum Computing?

The application of quantum theory to computer technology is known as quantum computing. Quantum theory explains the scales of energy and matter at the atomic and subatomic levels.

Electrons and photons are examples of subatomic particles used in quantum computing. These particles can exist in both a state of 1 and a state of 0 simultaneously thanks to quantum bits, or qubits.

It is theoretically possible for linked qubits to “use the interference between their wave-like quantum states to accomplish calculations that would otherwise take millions of years.”

The power of quantum computing allows it to sort through enormous amounts of potential options and identify potential answers to difficult issues. Quantum computers employ qubits to store data instead of the 0s or 1s that are used to store information in classical computers. Qubits store data in a quantum state that interacts with 0 and 1 in several dimensions.

Key Takeaways

  • With the help of quantum physics occurrences, new computing paradigms are developed.
  • Particles are essential to quantum computation.
  • A qubit can exist in more than one dimension, in contrast to a typical computer bit, which can only be either 0 or 1.
  • In direct proportion to the number of qubits, quantum computers gain power.
  • Power can only grow linearly in traditional computers as more bits are added.


Let’s talk about some features of “Quantum Computing”

  1. The impressive thing about a qubit, in IBM’s opinion, is not what it is but what it is capable of doing. In a state of superposition, a qubit places the quantum information it holds. “Groups of qubits in superposition can construct complex, multidimensional computational environments,” states this statement, referring to a combination of all viable qubit configurations. In these environments, complicated issues can be modeled in novel ways.
  2. Quantum computing power depends on entanglement. It is possible to entangle pairs of qubits. The two qubits are then said to be in a single state as a result of this. Changes to one qubit in such a condition have predictable effects on the other qubit.
  3. When qubits’ quantum behavior degrades, this is known as decoherence. Vibrations or temperature fluctuations have the ability to abruptly disrupt the quantum state. This may result in quantum states losing their superposition and introducing mistakes into the computation. Qubits must be shielded from this interference using techniques like vacuum chambers, supercooled refrigerators, and insulation.

Demerits of Quantum Computing

Quantum computing offers enormous potential for development and problem-solving in many industries. However, currently, it has its limitations.

  • The tiniest disruption in the qubit environment can result in decay, also known as decoherence. Computations either fail or have mistakes as a result of this. As mentioned before, during the computation phase, a quantum computer must be shielded from all outside disturbances.
  • There are still some unresolved issues with error correction in computing. Calculations could become inaccurate because of this. Qubits aren’t digital bits of data, thus they can’t use the same error-correction techniques that are typically employed by older computers.
  • Data can be tampered with when retrieving calculation results. It is encouraging to see advances like a specific database search method that guarantees that the quantum state will decohere into the proper response when it is measured.

Also read: Virtual reality headset to create a 3-dimensional perspective


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