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Quantum network. Quantum networks form an important element of quantum computing and quantum communication systems. Quantum networks facilitate the transmission of information in the form of quantum bits, also called qubits, between physically separated quantum processors. A quantum processor is a machine able to perform quantum circuits on a ...
IBM Q System One. IBM Quantum System One is the first circuit -based commercial quantum computer, introduced by IBM in January 2019. [ 1][ 2][ 3] This integrated quantum computing system is housed in an airtight borosilicate glass cube that maintains a controlled physical environment. [ 2][ 4] Each face of the cube is 9 feet (2.7 m) wide and ...
The current state of quantum computing [ 1] is referred to as the noisy intermediate-scale quantum ( NISQ) era, [ 2][ 3] characterized by quantum processors containing up to 1,000 qubits which are not advanced enough yet for fault-tolerance or large enough to achieve quantum advantage. [ 4][ 5] These processors, which are sensitive to their ...
Quantum computing. Quantum System One, a quantum computer by IBM from 2019 with 20 superconducting qubits [ 1] A quantum computer is a computer that exploits quantum mechanical phenomena. On small scales, physical matter exhibits properties of both particles and waves, and quantum computing leverages this behavior using specialized hardware.
Quantum cryptography. Quantum cryptography is the science of exploiting quantum mechanical properties to perform cryptographic tasks. [ 1][ 2] The best known example of quantum cryptography is quantum key distribution, which offers an information-theoretically secure solution to the key exchange problem.
In quantum computing, a qubit (/ ˈ k juː b ɪ t /) or quantum bit is a basic unit of quantum information—the quantum version of the classic binary bit physically realized with a two-state device. A qubit is a two-state (or two-level) quantum-mechanical system , one of the simplest quantum systems displaying the peculiarity of quantum mechanics.
The major difference of quantum key distribution is the ability to detect any interception of the key, whereas with courier the key security cannot be proven or tested. QKD (quantum key distribution) systems also have the advantage of being automatic, with greater reliability and lower operating costs than a secure human courier network.
List of quantum processors. This list contains quantum processors, also known as quantum processing units (QPUs). Some devices listed below have only been announced at press conferences so far, with no actual demonstrations or scientific publications characterizing the performance. Quantum processors are difficult to compare due to the ...