When does a simulation become real?

Scott Kirkpatrick

Leon Riesebos, Kenneth R. Brown

Modern quantum computers rely heavily on real-time control systems for operation. Software for these systems is becoming increasingly more complex due to the demand for more features and more real-time devices to control. Unfortunately, testing real-time control software is often a complex process, and existing simulation software is not usable or practical for software testing. For this purpose, we implemented an interactive simulator that simulates signals at the application programming interface level. We show that our simulation infrastructure simulates kernels 6.9 times faster on average compared to execution on hardware, while the position of the timeline cursor is simulated with an average accuracy of 97.9% when choosing the appropriate configuration.

Stefan Hillmich, Robert Wille

Daniel Abellán, Antonio Valdivia, Alberto Antonio Del Barrio +2 more

Although Quantum Computing was introduced several decades ago, today is a hot-topic under research and development. Due to the technological difficulties to fabricate this type of computers, the employment of simulators become critical in order to allow researchers developing algorithms that can leverage the unique features of quantum computers, such as the case of Shor's or Grover's algorithms. Then, it is essential for these simulations to be as close as possible to the real results. In this paper we present a comparison between simulations and real executions of a 2-qubit adder. As the experiments show, the backends provided by IBM are able to obtain comparable simulated results to those obtained in real quantum computers.

WU Da-yan

Mont Carlo simulation of the renormalization of 2-dimensional square lattice Ising model is performed, using simple sampling and important sampling, respectively. For simple sampling, analytical result is got, but only small cell can be simulated; Comparatively, the much larger cell can be simulated using. And the obtained numerical solution becomes closer to the accurate result. The method of this article can highly improve the accuracy of real space renormalization.

Manfred Opper