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Cloud-based quantum computing is the invocation of quantum emulators, simulators or processors through the cloud. Increasingly, cloud services are being looked on as the method for providing access to quantum processing. Quantum computers achieve their massive computing power by initiating quantum physics into processing power and when users are allowed access to these quantum -powered-computers through the internet it is known as quantum computing within the cloud.

IBM had connected a small quantum computer to the cloud and it allows for simple programs to be built and executed on the cloud. Many people from academic researchers and professors to schoolkids, have already built programs that run many different quantum algorithms using the program tools. Some consumers hoped to use the fast computing to model financial markets or to build more advanced AI systems. These use methods allow people outside a professional lab or institution to experience and learn more about such a phenomena technology.

Application
Cloud-based quantum computing is used in several contexts:
 * In teaching, teachers can use cloud-based quantum computing to help their students better understand quantum mechanics, as well as implement and test quantum algorithms.
 * In research, scientists can use cloud-based quantum resources to test things such as quantum information theories, perform experiments, or compare architectures.
 * In games, developers can use cloud-based quantum resources can create quantum games to introduce people to quantum concepts.

Existing platforms

 * Forest by Rigetti Computing, which consists of a toolsuite for quantum computing. It includes a programming language, development tools and example algorithms.
 * LIQUi|> by Microsoft, which is a software architecture and toolsuite for quantum computing. It includes a programming language, example optimization and scheduling algorithms, and quantum simulators.
 * Q#, a quantum programming language by Microsoft on the .NET Framework seen as a successor to LIQUi|>.
 * IBM Q Experience by IBM, providing access to quantum hardware as well as HPC simulators. These can be accessed programmatically using the Python-based Qiskit framework, or via graphical interface with the IBM Q Experience GUI . Both are based on the OpenQASM standard for representing quantum operations. There is also a tutorial and online community . Currently available simulators and quantum devices are:
 * Multiple transmon qubit processors . Those with 5 and 16 qubits are publicly accessible. Devices with 20 qubits are available through the IBM Q Network.
 * A 32 qubit cloud-based simulator. Software for locally hosted simulators are also provided as part of Qiskit.
 * Quantum in the Cloud by The University of Bristol, which consists of a quantum simulator and a four qubit optical quantum system.
 * Quantum Playground by Google, which features a simulator with a simple interface, and a scripting language and 3D quantum state visualization.
 * Quantum in the Cloud by Tsinghua University. It is a four-qubit new quantum cloud experience based on nuclear magnetic resonance-NMRCloudQ.
 * Quantum Inspire by Qutech, providing access to QX, a quantum simulator backend. Three instances of the QX simulator are available, simulating up to 26 qubits on a commodity cloud-based server and up to 37 qubits using 16 'fat' nodes on Cartesius, the Dutch national supercomputer of SurfSara. Circuit based quantum algorithms can be created through a graphical user interface or through the Python-based Quantum Inspire SDK, providing a backend for the projectQ framework, the Qiskit framework. Quantum Inspire provides a knowledge base with user guides and some example algorithms written in cQASM.