5 Minute Guide to Quantum Computing

5 Minute Guide To Quantum Computing

Quantum Computing doesn’t have to be complicated. Here is a simple 5-minute quantum computing guide outlining some primary areas. It won’t make you an expert, but if you have just a few minutes (five) to spare, it can give you a jump start into the exciting world of quantum computing!

Introduction to Quantum Computing

Quantum computing is a field of computer science that uses the principles of quantum mechanics to perform complex computations that would be impossible with classical computers. Quantum computing uses quantum bits or qubits, representing 0 and 1 simultaneously (in a super-position), allowing for exponential speedup over classical computing over some computational tasks (not all).

Basic Principles of Quantum Mechanics

Quantum mechanics is the branch of physics that describes the behaviour of particles at the atomic and subatomic levels. It is based on the idea that particles exist in a state of superposition until they are observed, which means that they can exist in multiple states simultaneously. This concept is what makes quantum computing possible. Entanglement is also another key property of some quantum systems.

The Role of Qubits in Quantum Computing

Qubits are the fundamental building blocks of quantum computing. They are the quantum equivalent of classical bits, but unlike classical bits, they can represent both 0 and 1 simultaneously. This property of qubits is known as superposition and allows quantum computers to perform computations much faster than classical computers.

Quantum Gates and Circuits

Quantum gates are the equivalent of classical logic gates in quantum computing. They are used to manipulate qubits and perform operations on them. Quantum circuits are made up of a series of quantum gates that are connected to perform a specific computation.

Quantum Algorithms

Quantum algorithms are algorithms that are designed to run on a quantum computer. Some of the most famous quantum algorithms include Shor’s algorithm, which can factor large numbers exponentially faster than classical algorithms, and Grover’s algorithm, which can search an unsorted database exponentially faster than classical algorithms.

The Challenges of Building a Quantum Computer

Building a quantum computer is a challenging task due to the fragility of qubits and the difficulty in maintaining their quantum state. Quantum computers also require specialized equipment and extremely low temperatures to operate, typically. But, there are also many competing technologies for qubits such as photonics which uses light.

Applications of Quantum Computing

Quantum computing can potentially revolutionize fields such as cryptography, drug discovery, and optimization problems. For example, quantum computers could be used to crack currently unbreakable encryption codes, simulate complex chemical reactions, and optimize complex logistics problems.

Current State of Quantum Computing

While significant progress has been made in the field of quantum computing, practical quantum computers with enough qubits to perform useful computations are still in development. However, many companies and research institutions are actively working on developing quantum computers, and it is expected that significant progress will continue to be made in the coming years. For example, IBM has a machine with 433 Qubits!


Quantum computing has the potential to revolutionize many fields and solve problems that are currently unsolvable with classical computing. While practical quantum computers are still in development, the progress made in the field so far is promising and suggests that we may be on the verge of a new era of computing.

Resources for Further Learning

Many resources are available for those interested in learning more about quantum computing. These include online courses, textbooks, research papers, and conferences. We cover a lot at Quantum Zeitgeist!