## Introduction

Quantum computing is a technology that can change the world as we know it. It could improve everything from aeroplane navigation systems to cancer treatments. But what exactly is quantum computing? How will it work?

What are its limitations? I will answer some of these questions and provide an overview of quantum computing, so you can make sense of this exciting new technology.

## What is quantum computing?

Quantum computing is a new type of computer that uses quantum bits (or qubits). These are the building blocks of quantum computers, which can be used to store information in multiple states simultaneously.

For example, suppose you have an ordinary bit (a 0 or 1). In that case, it can only exist as either 0 or 1 at any given time–it cannot be both simultaneously. But with qubits, they can be both 0 and 1 simultaneously because they are so small that they exist in many different states at once! This means that our computers could process information faster than ever by taking advantage of this ability to process more data than we could ever hope for using traditional processors.

## What is the difference between conventional and quantum computers?

Quantum computers are based on the quantum theory of physics, which states that a particle can exist in multiple states at once–a phenomenon called superposition. In standard computing terms, this means that the qubits used in a quantum computer can be used to represent both 0s and 1s at the same time. This property allows calculations to be done much faster than traditional computers because they don’t need to perform sequential operations or wait for results from one step before proceeding with another (see example below).

In addition to being faster, some problems cannot currently be solved by conventional computers but can be solved by quantum ones. For example, Shor’s algorithm can quickly factor large numbers into their prime factors; this method is used today by banks and other institutions worldwide as part of their security protocols for online transactions involving credit cards or money transfers between accounts.

## How is quantum computing different from current “digital” computers?

Quantum computers use quantum bits or qubits. A conventional digital computer uses an electrical charge to represent information in binary code (0s and 1s). A quantum computer uses subatomic particles that can be in multiple states at once–a property called superposition–to hold a much larger number of possible values than traditional bits do. This is why quantum computers are so powerful: they can explore more potential solutions to any given problem than conventional computers can, allowing them to solve problems that would have proven impossible for us to crack using our current technology.

Theoretically, there’s no limit on how many qubits you could combine into one unit; the more qubits you add to your system, the faster it will solve problems that would take years if done by hand alone!

## Will a quantum computer be able to crack encryption methods like RSA?

Quantum computers are not a threat to RSA.

RSA is a public key encryption algorithm, which means that the key used to encrypt data is shared and, therefore, relatively easy to find. A quantum computer can only break symmetric encryption algorithms used for private-key cryptography. These are typically used in conjunction with public-key systems–you might encrypt your files with AES256 (symmetric) before sending them over email using PGP (public).

AES256 is one of many symmetric algorithms; there’s 3DES (Triple Data Encryption Standard), Blowfish, Twofish and more!

## How will the rise of quantum computing affect our daily lives?

If you think about it, the world around us is incredibly complex. It’s not just that we must consider all the individual atoms and molecules that make up our bodies, but also how they interact with other elements for us to function correctly.

A quantum computer could simulate these interactions so perfectly that it could predict what would happen if you ate a certain food or took a particular medication–something no human being could ever hope for!

They will also be able to solve problems that are too complex for today’s computers by taking advantage of another quantum phenomenon: entanglement. Entanglement allows two particles separated by large distances (even light years) from one another to act as if they’re still connected somehow; this means that if one changes its state, then so does its twin particle immediately without any delay at all!

Instead of going through every possible solution separately to find an answer, we can simultaneously look at all possible outcomes using superpositioning, which provides exponential speedups over classical computing methods.”

## What are the challenges to building a practical quantum computer?

There are several challenges to building a practical quantum computer. First, it’s difficult to fabricate the qubits and keep them stable at room temperature. Second, computers are expensive; even the most basic models cost millions.

Third, they’re delicate machines that must be protected from environmental changes and electromagnetic interference–the slightest jolt could cause a qubit to decay or shift into an incorrect state. Finally, quantum computers are still in their infancy: we need to figure out how best to use them or what kinds of problems they’ll solve best when they come online later this year or early next year.

These limitations mean that you will see few practical applications for these machines any time soon–but there’s still plenty of reason for excitement!

The possibilities offered by quantum computing are endless; scientists have already used them for everything from simulating materials science experiments on large molecules such as proteins and DNA strands all the way down through individual atoms; to developing new drugs based on molecular modelling techniques like docking analysis; designing new materials with better properties than any known today; predicting weather patterns years in advance using meteorological data collected over decades by satellites orbiting earth’s atmosphere.

## Conclusion

The rise of quantum computing is a game-changing moment in the history of technology. It will change how we live, work, and even think about ourselves as humans as machines. We are on the cusp of something unique here–but it also means that everything we know about computers needs to be rethought from scratch!