Quantum information: The promise

Karl Svozil

Andrei Derevianko, Eden V. Figueroa, Julián Martínez-Rincón +12 more

Quantum networks of quantum objects promise to be exponentially more powerful than the objects considered independently. To live up to this promise will require the development of error mitigation and correction strategies to preserve quantum information as it is initialized, stored, transported, utilized, and measured. The quantum information could be encoded in discrete variables such as qubits, in continuous variables, or anything in-between. Quantum computational networks promise to enable simulation of physical phenomena of interest to the HEP community. Quantum sensor networks promise new measurement capability to test for new physics and improve upon existing measurements of fundamental constants. Such networks could exist at multiple scales from the nano-scale to a global-scale quantum network.

Jeremy L. O’Brien

(100 Word Limit): Quantum information science promises profoundly disruptive information and communication technologies. Photons are ideal carriers of quantum information: Their low noise, high speed transmission, and ease of manipulation at the single photon level make them indispensable for quantum communication, which offers security based on the laws of physics, quantum metrology, which promises the ultimate precision measurements, and quantum information processing, which promises exponentially greater computational power for particular tasks. Recently integrated optical devices have been applied to these technologies. We give an overview of quantum technologies and progress towards their realisation in integrated optics. Presenter Bio (100 Word Limit): O’Brien is director of the Centre for Quantum Photonics, University of Bristol. His Ph.D. from the University of New South Wales in 2002 was for experimental work on correlated and confined electrons in organic conductors, superconductors and semiconductor nanostructures, and progress towards silicon quantum computing. At the University of Queensland (2001-2006) he worked on quantum optics and quantum information science with photons. CQP’s efforts are focused on the fundamental and applied quantum mechanics at the heart of quantum information science and technology, from prototypes for scalable quantum computing to quantum communication, and quantum metrology.

Linda Sansoni

Xian Ma

Quantum information is promising in solving certain computational problems and information \nsecurity. The power of its speed up and privacy is based on one of the most \ntested physical theory: quantum mechanics. Many of the promises of quantum information \nhas already been demonstrated in different implementations, which could also be viewed \nas witness of quantum mechanics. As we progress further in quantum information, we find \nthat some of the aspects of quantum mechanics could be tested in a novel way. Performing \nthose tests may lead to new physical theory or at least reinforce our belief of the accuracy \nof quantum mechanics. In this thesis, I report a few different approaches in testing the \nfoundation of quantum mechanics using results obtained from quantum optics. While developing \nsuch test, quantum state tomography is heavily used to characterize our system. \nI also report a simplified way of performing quantum state tomography for quantum state \nthat is close to pure state.

Maximilian Schlosshauer