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Cai: Nano-scale quantum sensing with color centers in diamond
Dr. Jianming Cai, Universität Ulm
Color centers are atomic defects in diamond that possess electronic and nuclear spins.
The rapid progress of experiments with color centers in diamond indicates that
they are promising systems for quantum information processing, and more important for quantum
sensing (imaging) under ambient conditions.
Screening of Gravity
The Institute for Quantum Computing's (IQC) Grad Student Association is screening the 7 Academy Award winning movie Gravity on April 2nd at 7 pm. The event will be followed by a short presentation and Q&A with IQC's associate member, astronaut, and former Canadian Space Agency president Steve MacLean.
Hormozi: Topological Quantum Compiling with Fractional Quantum Hall States
Layla Hormozi, National University of Ireland
A topological quantum computer is a hypothetical device in which intrinsic fault-tolerance is embedded in the hardware of the quantum computer. It is envisioned that in these devices quantum information will be stored in certain topologically ordered states of matter and quantum computation will be carried out by braiding the world-lines of quasiparticle excitations that obey non-Abelian statistics, around one another, in specific patterns.
Pastawski: Using dissipation for quantum information processing.
Fernando Pastawski, California Institute of Technology
In this talk I will focus on dissipative dynamics as a model for quantum information processing (QIP). Arguably, some form of open system description is required in order to model large experimental systems which inevitably exchange information with their environment. Lindblad master equations allow describing the effect of the environment to first non-trivial order. Within such a model, it becomes natural to design forms of dissipation, where the environment is engineered to aid or perform a QIP task.
Fan: Quantum receivers beyond the stand quantum limit of coherent optical communications
Jingyun Fan, National Institute of Standards and Technology
Measurements based on the quantum properties of physical system have enabled many tasks which are not possible by any classical means. In this talk, I introduce two quantum receivers that discriminate nonorthogonal optical coherent states unconditionally surpassing the standard quantum limit, with mean photon numbers ranging from single photon level to many photons, thus bridging the gap between quantum information technology and state-of-the art coherent communications.
Scholz: Operationally-Motivated Uncertainty Relations for Joint Measurability and the Error-Disturbance Tradeoff
Volkher Scholz, Institute for Theoretical Physics ETH Zurich
We derive new Heisenberg-type uncertainty relations for both joint measurability and the error- disturbance tradeoff for arbitrary observables of finite-dimensional systems. The relations are formulated in terms of a directly operational quantity, namely the probability of distinguishing the actual operation of a device from its hypothetical ideal, by any possible testing procedure whatsoever.
Traub: Algorithms and Complexity for Quantum Computing
Joseph F. Traub, Columbia University
We introduce the notion of strong quantum speedup. To compute this
speedup one must know the classical computational complexity. What is it about the problems of quantum physics and quantum chemistry that enable us to get lower bounds on the classical complexity?
Kothari: Exponential improvement in precision for simulating sparse Hamiltonians
Robin Kothari
We provide a quantum algorithm for simulating the
dynamics of sparse Hamiltonians with complexity sublogarithmic in
the inverse error, an exponential improvement over previous methods.
Unlike previous approaches based on product formulas, the query
complexity is independent of the number of qubits acted on, and for
time-varying Hamiltonians, the gate complexity is logarithmic in the
norm of the derivative of the Hamiltonian. Our algorithm is based on
a significantly improved simulation of the continuous- and
Jafari-Salim: Superconducting Nanostructures for Quantum Detection of Electromagnetic Radiation
Amir Jafari-Salim, IQC
In this talk, I will give a summary of my recent research on superconducting nanostructures for quantum detection of electromagnetic radiation. In this regard, electrodynamics of topological excitations in 1D superconducting nanowires and 2D superconducting nanostrips is investigated. Topological excitations in superconducting nanowires and nanostrips lead to crucial deviation from the bulk properties.