Peter Heuer - Quantum Cryptography Using Single and Entangled
... Bob in their original state, leaving no sign of her intervention. A stream of photons that are truly spatially separated is said to be antibunched. An attenuated laser beam contains bunched photons and is therefore insufficient for secure quantum communication. True single photon sources are created ...
... Bob in their original state, leaving no sign of her intervention. A stream of photons that are truly spatially separated is said to be antibunched. An attenuated laser beam contains bunched photons and is therefore insufficient for secure quantum communication. True single photon sources are created ...
Simulation of Quantum Computation with Wolfram
... Quantum computation and quantum information is a rapidly developing research area of modern science and technology. Quantum computers are to be able to perform certain computational tasks much more efficiently than classical computers. At the same time a realistic quantum computer is still not availab ...
... Quantum computation and quantum information is a rapidly developing research area of modern science and technology. Quantum computers are to be able to perform certain computational tasks much more efficiently than classical computers. At the same time a realistic quantum computer is still not availab ...
Part IV
... Probability that a given qubit has no error in time t Probability that none of n qubits has an error in time t Let t be the time taken to perform a gate operation. For an efficient algorithm we might need n2 operations. The number of required gate operations tends to grow at least logarithmically in ...
... Probability that a given qubit has no error in time t Probability that none of n qubits has an error in time t Let t be the time taken to perform a gate operation. For an efficient algorithm we might need n2 operations. The number of required gate operations tends to grow at least logarithmically in ...
pen14qip
... qubits. • The ability to initialize the state of the qubits. • Long decoherence time with respect to gate operation time • Universal set of quantum gates. • A qubit-specific measurement capability. ...
... qubits. • The ability to initialize the state of the qubits. • Long decoherence time with respect to gate operation time • Universal set of quantum gates. • A qubit-specific measurement capability. ...
Quantum Physics - Particle Physics and Particle Astrophysics
... – former described bosons (force particles, mesons) latter describes fermions (quarks, leptons, baryons) – negative sign implies that two particles cannot have exactly the same quantum numbers, as Y(a,a) must be zero – Pauli Exclusion Principle ...
... – former described bosons (force particles, mesons) latter describes fermions (quarks, leptons, baryons) – negative sign implies that two particles cannot have exactly the same quantum numbers, as Y(a,a) must be zero – Pauli Exclusion Principle ...
Quantum teleportation
Quantum teleportation is a process by which quantum information (e.g. the exact state of an atom or photon) can be transmitted (exactly, in principle) from one location to another, with the help of classical communication and previously shared quantum entanglement between the sending and receiving location. Because it depends on classical communication, which can proceed no faster than the speed of light, it cannot be used for faster-than-light transport or communication of classical bits. It also cannot be used to make copies of a system, as this violates the no-cloning theorem. While it has proven possible to teleport one or more qubits of information between two (entangled) atoms, this has not yet been achieved between molecules or anything larger.Although the name is inspired by the teleportation commonly used in fiction, there is no relationship outside the name, because quantum teleportation concerns only the transfer of information. Quantum teleportation is not a form of transportation, but of communication; it provides a way of transporting a qubit from one location to another, without having to move a physical particle along with it.The seminal paper first expounding the idea was published by C. H. Bennett, G. Brassard, C. Crépeau, R. Jozsa, A. Peres and W. K. Wootters in 1993. Since then, quantum teleportation was first realized with single photons and later demonstrated with various material systems such as atoms, ions, electrons and superconducting circuits. The record distance for quantum teleportation is 143 km (89 mi).