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Radiation Delivery, cancer, radiation therapy, electron, isocentre, planned target volume, adaptive radiotherapy, multi-leaf collimator, energy deposition, multi-beam delivery, intensity modulation, optimal radiation treatment, matrix inversion, inverse planning optimization, symmetries, fast inverse dose optimization

Quantum cryptography, quantum physics, cryptography, one-time pad, RSA, encryption, public key, decryption, private key, quantum computer, qubit, quantum key, distribution, QKD, Moore\'s Law, probability, quantum theory, complex number, beam splitter, superposition, electron orbital, Turing, quantum parallelism, EPR, Bell, information security

teaching relativity, Galilean relativity, Einstein\'s postulates, Lorentz-Einstein transformations, time, length, Galilean transformation equations, spatial separating, temporal separation, laws of mechanics, Maxwell\'s equations, Michelson-Morley

Institute of Science, A levels, boring, difficult, support for schools, girls in physics, advancing physics, physics education, celestia, videshell, quantum atomica, walter fend, physics lab, phet, modellus, clea, lancaster particle physics, many paths, seismology, stellarium, Alice law, warp, wintreb, datapoint, tinycad, falstad applets, spektrus, emanim

This talk is concerned with the noise-insensitive transmission of quantum information. For this purpose, the sender incorporates redundancy by mapping a given initial quantum state to a messenger state on a larger-dimensional Hilbert space. This encoding scheme allows the receiver to recover part of the initial information if the messenger system is corrupted by interaction with its environment. Our noise model for the transmission leaves a part of the quantum information unchanged, that is, we assume the presence of a noiseless subsystem or of a decoherence-free subspace. We address the case when the noiseless component cannot contain all the quantum information to be transmitted, and investigate how to best spread the information in a quantum state across the noise-susceptible components. (Joint work with David Kribs and Vern Paulsen.)