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Quantum Computing and its potential applications

This article discusses quantum computing and its potential applications. A quantum computer is a computer that uses quantum mechanics, which allows it to perform calculations much faster than a regular computer. Qubits are made up of particles like the electron, and any number of simple actions or variables can send qubits falling into decoherence, which can lead to data loss. There are many applications for quantum computing, but some of the most important ones include molecules used as chemical catalysts and solving Pells equation.

Quantum computing is based on the concept of a quantum Turing machine. This machine is used to solve quantum computers, which is discussed in detail in the literature. Quantum hypercomputation has also been discussed and it can be used to solve some NP complete problems, such as NP-complete problems, using a quantum adiabatic algorithm. A quantum mechanical automaton is a device that uses the principles of quantum theory to perform computations in time quanta. Hilbert’s tenth problem can also be solved using this technology, allowing for superposition principle to be applied in order to solve undecidable problems equivalent to those posed by David Albert’s theory of computation. Classical automata are unable to solve undecidable problems, but quantum mechanical automata are able to do so due to their ability to use the principles of quantum theory. [Sources: 5, 9]
    
Quantum computers use a new type of computing called quantum algorithms, which are able to solve problems that classical computers cannot. Quantum computers are capable of performing calculations on unmeasured quantum states, which allows them to tackle certain computational problems that classical counterparts cannot. Special algorithms and techniques have been developed to solve problems that classical computers cannot. These techniques involve plugging complex mathematics into the equations so that the computer can calculate solutions faster than a classical computer. As a result, quantum computers are able to solve many problems that take a classical computer an exponentially long time to solve. Furthermore, these computers can process exponentially more data than their classical counterparts and can thus solve more complex and difficult problems in much less time than traditional methods would allow. [Sources: 4, 6, 9]
    
Quantum computing is based on quantum superposition, which is the ability of a quantum bit (qubit) to exist in multiple states at the same time. This means that unlike classical computers that store information as either 0 or 1, qubits can exist in both 0 and 1 states simultaneously. Qubits are made using physical systems such as photons and electrons that have a spin orientation, which is the property of a system to exist in two different states. [Sources: 1, 3]
    
These qubits are sent over a quantum state, that is prone to errors or data loss. This is because the qubits can suffer from decoherence if subjected to a disturbance, including measurements, causing premature measurement and data loss. Unlike binary classical bits, qubits can also be in important superposition states which allows for simple actions such as sending a number of variables of data with one action. However, if the qubits collapses during transit this could result in data loss. To prevent this it’s important to have error correction protocols that detect and fix the errors before they cause any disruption. [Sources: 2, 10, 11]
    
This is where a quantum computer comes into play. It can break the encryption that relies on cryptographic systems, because it can process information at an unprecedented speed. It achieves this by using computer qubits which are affected by nearby electric fields, allowing them to run algorithms with the help of the uncertainty principle. Decoherence is a problem that arises when a quantum computer interacts with its environment, influencing the result in an unwanted way and thus making it difficult to record information accurately. To combat this issue, researchers have come up with something called fault-tolerant protocols which essentially shield the system from external influences and thereby reduce decoherence to manageable levels. [Sources: 0, 9, 10]
    
This fault-tolerant protocol works on the basis of quantum circuit model, to create clever superposition. Shor’s most famous algorithm is an example of this in action. Shor’s algorithm is a quantum algorithm that can factor very large numbers and count the number of times one number divides into another. It is considered to be one of the best classical algorithms for factoring and counting, as it ensures desired speed up compared to other classical algorithms for these tasks. The algorithm works by using qubits to represent numbers, and then using local transformations (involving only two qubits at a time) that take linear time in the number of qubits used (n2). This allows the problem to be solved efficiently and quickly by taking small computational steps until it reaches its target. [Sources: 5, 8, 10]
    
Quantum Computing is a field of study that focuses on using quantum algorithms to solve complex problems that were previously impossible. It uses quantum mechanics to understand quantum systems and simulate classical algorithms. These quantum algorithms are used to solve factoring-related problems and discrete logarithms, as well as other applications such as chemistry and nanotechnology. One of the best-known quantum algorithms is Grovers Algorithm, which can provide a polynomial speedup over the best known classical algorithm for some problems. Quantum computing has opened up new possibilities for solving hidden subgroup problems, leaving computational complexity theory far behind. It is an encapsulated technological advancement that has enabled many new applications in various fields such as cryptography, optimization, and machine learning. Algorithms include Shors algorithm which is used for factoring large numbers, solving discrete logarithms, and simulating classical algorithms using a quantum system. [Sources: 5, 8, 9]
    
Quantum technology has been developed to create easier quantum computers, relying on entangled qubits. Qutech is a company that has been developing these technologies and producing todays semiconductor components using existing silicon manufacturing processes. This technology toolbox is the foundation for science research in which physicists are developing sophisticated control of spin qubits for quantum computing. Additionally, computer scientists have developed robust techniques for improving the fundamental building blocks of quantum computing, such as entanglement, error correction, and state preparation. By combining these techniques with existing hardware platforms and developing sophisticated control algorithms, we can see a world where quantum computing is part of our everyday lives. By improving the underlying building blocks of quantum computing, researchers are able to develop more powerful and efficient computers that can be used in a variety of applications such as cryptography and artificial intelligence. [Sources: 1, 7, 11]
    
Quantum computers are based on the principles of quantum mechanics, which allow them to solve problems that classical computers cannot. Quantum computers can be used to simulate molecules, such as simulated lithium hydrogen, small enough molecule which is too complex for a classical computer simulation. With this ability, researchers are able to check their answers and solve undecidable problems that may not be solvable with traditional computers. Additionally, quantum computing can be used to disprove the Church-Turing thesis and provide new insights into chemical catalysts and other research areas. [Sources: 2, 7, 9]

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