Single and Entangled Photons
نویسنده
چکیده
Quantum computing is a sought after technology that will greatly increase the speed and security of computations and communications. The understanding of quantum computing and information technology is dependent upon the understanding of quantum interactions. The difference between current computers and quantum computers lies in the fundamental units of information utilized. The qubit, which is a unit of quantum information in quantum computing, is analogous to the bit in classical information theory. A bit can be either of two states, often denoted as 1 and 0. However, a qubit can be either of the two states or a superposition of the two states. Unlike classical bits, qubits can also become entangled. Entanglement is a quantum phenomenon in which two particles interact in such a way that when they separate they can only be represented by the same description/wave function. Another important concept in quantum based technology is the single photon source.
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