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Quantum information science is a field that combines the principles of quantum mechanics with information theory to study the processing, analysis, and transmission of information. It covers both theoretical and experimental aspects of quantum physics, including the limits of what can be achieved with quantum information .
In the field of quantum information theory, the quantum systems studied are abstracted away from any real world counterpart. A qubit might for instance physically be a photon in a linear optical quantum computer, an ion in a trapped ion quantum computer, or it might be a large collection of atoms as in a superconducting quantum computer.
Shapiro has published numerous articles on language, law, and information science, including "The Politically Correct United States Supreme Court and the Motherfucking Texas Court of Appeals: Using Legal Databases to Trace the Origins of Words and Quotations" [2] and "Who Wrote the Serenity Prayer". [3]
Niebuhr created the first version of the Serenity Prayer. [93] It inspired Winnifred Wygal to write versions of the prayer that would become well known. Fred R. Shapiro , who had cast doubts on Niebuhr's claim of authorship, conceded in 2009 that, "The new evidence does not prove that Reinhold Niebuhr wrote [the prayer], but it does ...
Quantum information theory is a generalization of classical information theory to use quantum-mechanical particles and interference. It is used in the study of quantum computation and quantum cryptography .
In quantum information and computation, the Solovay–Kitaev theorem says that if a set of single-qubit quantum gates generates a dense subgroup of SU(2), then that set can be used to approximate any desired quantum gate with a short sequence of gates that can also be found efficiently.
Charles Henry Bennett (born 1943) [1] is a physicist, information theorist and IBM Fellow at IBM Research.Bennett's recent work at IBM has concentrated on a re-examination of the physical basis of information, applying quantum physics to the problems surrounding information exchange.
The quantum mechanical counterpart of classical probability distributions are modeled with density matrices. Consider a quantum system that can be divided into two parts, A and B, such that independent measurements can be made on either part. The state space of the entire quantum system is then the tensor product of the spaces for the two parts.