Measuring magic on a quantum processor

Efficient quantum walk on a quantum processor.

The random walk formalism is used across a wide range of applications, from modelling share prices to predicting population genetics. Likewise, quantum walks have shown much potential as a framework for developing new quantum algorithms. Here we present explicit efficient quantum circuits for implementing continuous-time quantum walks on the circulant class of graphs. These circuits allow us to...

A variational eigenvalue solver on a photonic quantum processor

Quantum computers promise to efficiently solve important problems that are intractable on a conventional computer. For quantum systems, where the physical dimension grows exponentially, finding the eigenvalues of certain operators is one such intractable problem and remains a fundamental challenge. The quantum phase estimation algorithm efficiently finds the eigenvalue of a given eigenvector bu...

Quantum Magic in Artificial Crystals

they also facilitate completely new approaches, for instance in data processing. To better understand them, the team working with Immanuel Bloch, Director at the Max Planck Institute of Quantum Optics in Garching, is using atoms in optical lattices to simulate quantum matter. In doing so, they have repeatedly observed a behavior of matter that contradicts our everyday experience. Quantum Magic ...

Quantum Computing without Magic: Devices

Demonstration of Topological Data Analysis on a Quantum Processor

He-Liang Huang,1, 2, 3, 4 Xi-Lin Wang,1, 2, 3 Peter P. Rohde,5 Yi-Han Luo,1, 2, 3 You-Wei Zhao,1, 2, 3 Chang Liu,1, 2, 3 Li Li,1, 2, 3 Nai-Le Liu,1, 2, 3 Chao-Yang Lu,1, 2, 3 and Jian-Wei Pan1, 2, 3 Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China CAS Centre for Excellence an...