Quantum computing

Concepts

• 
  Hilbert spaceKeystone

  Connects 23 concepts

  The mathematical concept of a Hilbert space generalizes the notion of Euclidean space.

  Source
• 
  Quantum entanglementKeystone

  Connects 22 concepts

  Quantum entanglement is the phenomenon in which the quantum state of each particle in a group cannot be described independently of the state of the others, even when the particles are separated by a large distance.

  Source
• 
  Quantum circuitKeystone

  Connects 15 concepts

  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.

  Source
• 
  Poincaré sphere

  The term Poincaré sphere refers to several distinct concepts across physics and mathematics. In optics, it is a graphical representation used to map and visualize the polarization states of light. In quantum mechanics, the related Bloch sphere provides a geometric representation of the state space of a two-level quantum system. In topology, the Poincaré homology sphere is a specific three-dimensional manifold that serves as a significant example of a homology sphere, demonstrating properties that distinguish it from the standard three-sphere.

  Source
• 
  Orthonormal basis

  In mathematics, particularly linear algebra, an orthonormal basis for an inner product space with finite dimension is a basis for whose vectors are orthonormal, that is, they are all unit vectors and orthogonal to each other.

  Source
• 
  Von Neumann entropy

  In physics, the von Neumann entropy, named after John von Neumann, is a measure of the statistical uncertainty within a description of a quantum system.

  Source
• 
  No-communication theorem

  In physics, the no-communication theorem is a no-go theorem in quantum information theory.

  Source
• 
  William Wootters

  William "Bill" Kent Wootters is an American theoretical physicist, and one of the founders of the field of quantum information theory.

  Source
• 
  Quantum teleportation

  Quantum teleportation is a technique for transferring quantum information from a sender at one location to a receiver some distance away.

  Source
• 
  Hidden-variable theory

  In physics, a hidden-variable theory is a deterministic model which seeks to explain the probabilistic nature of quantum mechanics by introducing additional, possibly inaccessible, variables.

  Source
• 
  Kochen–Specker theorem

  In quantum mechanics, the Kochen–Specker (KS) theorem, also known as the Bell–KS theorem, is a "no-go" theorem proved by John S.

  Source
• 
  Quantum contextuality

  Quantum contextuality is a feature of the phenomenology of quantum mechanics whereby measurements of quantum observables cannot simply be thought of as revealing pre-existing values.

  Source