09:00 to 09:40 R Kosut (SC Solutions)Robust Quantum Control for Quantum Information Systems Co-authors: Matthew Grace (Sandia National Laboratories), Constantin Brif (Sandia National Laboratories), Hersch Rabitz (Princeton University) In a 1985 paper in Optics News entitled Quantum Mechanical Computers,'' Richard Feynman described how a computer could be built upon the mathematical principles of quantum mechanics. But he also heralded the difficulties in an actual physical implementation: This computer seems to be very delicate and these imperfections may produce considerable havoc.'' This talk will describe our on-going efforts to alleviate the potential havoc'' by appealing to robust control design, both model-based and data-based. The model-based approach relies on uncertainty modeling, i.e., values of parameters and noise sources in the model are unknown but contained in bounded sets. Sequential convex programming (SCP) is used to find controls which maximize fidelity despite the uncertainty. From an available set of input/observable pairs, the same type of model is used to estimate fidelity as well as refine knowledge about uncertain parameters, thereby leading to a more robust control providing increased performance. INI 1 09:40 to 10:20 M Sarovar (Sandia National Laboratories)Model realization and model reduction for quantum systems Co-authors: Jun Zhang (Shanghai Jiao Tong University) & Akshat Kumar (Sandia National Laboratories) I will describe the application of two classic notions from linear systems theory to the quantum domain: (i) model realization, the notion of constructing a dynamical model from input-output data only, and (ii) model reduction, the notion of developing compressed descriptions of system dynamics. First I will detail how model realization methods can be used to develop a technique for estimating parameters in quantum Hamiltonians directly from input-output data (arXiv:1401.5780). This method is particularly advantageous in scenarios with restricted system access and nontrivial prior information. In the second part of the talk I will present methods that allow for construction of reduced order models for quantum dynamics based on identifying invariant subspaces of Hamiltonians (arXiv:1406.7069). These methods reduce the burden of simulating some models of quantum many-body dynamics. INI 1 10:20 to 10:50 Morning Coffee INI 1 10:50 to 11:30 C Santori (Hewlett-Packard Laboratories)Towards large-scale nonlinear photonic circuits Co-authors: Jason S. Pelc (Hewlett-Packard Laboratories), Raymond G. Beausoleil (Hewlett-Packard Laboratories), Nikolas Tezak (Stanford University), Ryan Hamerly (Stanford University), Hideo Mabuchi (Stanford University) This talk will describe work at HP Labs to design and build photonic circuits on semiconductor platforms that use Kerr, carrier-based and thermal nonlinearities to perform all-optical logic. We have developed a semi-classical model to simulate quantum noise and spontaneous switching in circuits containing hundreds of components. With this model we can address basic questions such as the minimum switching energy needed to avoid errors, or whether the circuits have adequate digital signal restoration. Recently, we have been working to reduce the complexity and improve tolerance to fabrication variations in the circuit designs. I will also summarize our recent experimental efforts on all-optical logic devices. INI 1 11:30 to 12:30 W Bowen (University of Queensland)Nonlinear optomechanical measurement of mechanical motion Co-authors: George A. Brawley (Australian Centre for Engineered Quantum Systems, University of Queensland), Michael R. Vanner (Australian Centre for Engineered Quantum Systems, University of Queensland), Silvan Schmid (Department of Micro- and Nanotechnology, Technical University of Denmark, Kongens Lyngby, Denmark ), Anja Boisen (Department of Micro- and Nanotechnology, Technical University of Denmark, Kongens Lyngby, Denmark ) An important goal in all facets of quantum optics is to be able to perform precise measurements of non-linear observables. This allows measurement-based non-classical state preparation, which has been applied to great success in various physical systems, and also provides a route for quantum information processing with otherwise linear interactions. In cavity optomechanics much progress has been made using a linear interaction and measurement, but observation of nonlinear degrees-of-freedom, such as phonon number, remains outstanding. Here we report the observation of position-squared thermal motion of a micro-mechanical resonator by exploiting the optical non-linearity of the radiation pressure interaction. Using this measurement, we conditionally prepare classical bi-modal mechanical states of motion with feature sizes well below 100 pm. Future improvements to our approach will allow the preparation of quantum superposition states, which can be used to experimentally explor e collapse models of the wavefunction and the potential for mechanical-resonator based quantum-metrology applications. Related Links •http://www.equs.org/ - ARC Centre of Excellence for Engineered Quantum Systems •http://www.physics.uq.edu.au/QOlab/ - Queensland Quantum Optics Lab INI 1 12:30 to 13:30 Sandwich lunch at INI 13:30 to 13:35 J Leeks ([Turing Gateway to Mathematics])Welcome and Introduction INI 1 13:35 to 13:45 M Butchers (Knowledge Transfer Network)Quantum Technologies Special Interest Group and Funding Opportunities INI 1 13:45 to 14:15 I Walmsley (University of Oxford)Emerging Quantum Technologies INI 1 14:15 to 14:45 T Calarco (Universität Ulm)Quantum Technologies From Science to Innovation INI 1 14:45 to 15:15 M Sarovar (Sandia National Laboratories)Maturing Quantum Technologies: a National Lab Perspective INI 1 15:15 to 15:30 Tea and Coffee 15:30 to 16:00 J Burgoyne ([Oxford Instruments])Quantum Technology: Supplying the Picks and Shovels INI 1 16:00 to 16:30 P Kimber ([Selex ES])Some Quantum Technology Challenges for Defence INI 1 16:30 to 17:00 Questions & Open Discussion INI 1 17:00 to 18:00 Networking & Wine Reception