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Integrated quantum photonics, uses photonic integrated circuits to control photonic quantum states for applications in quantum technologies. [ 1 ] [ 2 ] As such, integrated quantum photonics provides a promising approach to the miniaturisation and scaling up of optical quantum circuits . [ 3 ]
Since separating optical modes is a need for quantum computing, this technology may be helpful to miniaturize quantum computers (see linear optical quantum computing). Another example of a photonic integrated chip in wide use today in fiber-optic communication systems is the externally modulated laser (EML) which combines a distributed feed ...
For example, a coherent (classical) light input produces a coherent light output; a superposition of quantum states input yields a quantum light state output. [3] Due to this reason, people usually use single photon source case to analyze the effect of linear optical elements and operators.
Quantum processors are difficult to compare due to the different architectures and approaches. Due to this, published physical qubit numbers do not reflect the performance levels of the processor. This is instead achieved through the number of logical qubits or benchmarking metrics such as quantum volume , randomized benchmarking or circuit ...
Quantum cryptography enables new ways to transmit data securely; for example, quantum key distribution uses entangled quantum states to establish secure cryptographic keys. [52] When a sender and receiver exchange quantum states, they can guarantee that an adversary does not intercept the message, as any unauthorized eavesdropper would disturb ...
Common quantum logic gates by name (including abbreviation), circuit form(s) and the corresponding unitary matrices. In quantum computing and specifically the quantum circuit model of computation, a quantum logic gate (or simply quantum gate) is a basic quantum circuit operating on a small number of qubits.
The aptly named company focuses on developing photonic integrated circuits for quantum computers. It has eight installations and is the only pure-play public company specializing in nonlinear ...
In quantum information theory, a quantum circuit is a model for quantum computation, similar to classical circuits, in which a computation is a sequence of quantum gates, measurements, initializations of qubits to known values, and possibly other actions.