Seminar

Xiaodong Xu, The University of Washington

Electronic valleys are extrema of Bloch energy bands in momentum space. Having multiple valleys gives the electron states pseudospin degrees of freedom in addition to their real spin. In this talk, I will discuss our experimental progress on the investigation of spins and pseudospins using atomically thin semiconductors, which are either single or bilayer group VI transition metal dichalcogenides.

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.

Michael Reimer, Delft University of Technology, Netherlands

Guillermo Esteban Romero Huenchuir, University of Basque Country, Spain

In this talk, I will present my past, present, and new projects in the field of circuit quantum electrodynamics. First, I will show a proposal for microwave photodetection and how it has influenced our community to develop experiments and further theoretical developments. Second, I will show the first theoretical proposal of circuit QED with a quantum point contact as a two-level system.

Francois Le Gall, The University of Tokyo

In this talk I will describe recent progresses in the development of quantum algorithms for matrix multiplication. I will start with the case of Boolean matrices, and discuss the time complexity and query complexity of Boolean matrix multiplication in the quantum setting.

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.

Enrique Solano, Universidad del País Vasco, Bilbao, Spain

I will introduce the field of quantum simulations from a wide
scientific perspective. Then, I will discuss the relevance of quantum
simulations for reproducing different aspects of quantum physics:
nonrelativistic and relativistic quantum dynamics, physical and unphysical
quantum operations, as well as strong and ultrastrong light-matter
interactions. Finally, I will give examples in the context of trapped-ion
and circuit QED technologies.

Joseph F. Traub, Columbia University

Gerd Leuchs, Max Planck Institute for the Science of Light

Per Delsing, Chalmers University of Technology Sweden

We present a new type of mechanical quantum device, where propagating surface acoustic wave (SAW) phonons serve as carriers for quantum information. At the core of our device is a superconducting qubit, designed to couple to SAW waves in the underlying substrate through the piezoelectric effect. This type of coupling can be very strong, and in our case exceeds the coupling to any external electromagnetic mode.