Utkarsh Azad working under the supervision of Prof. Harjinder Singh presented a poster on Surface Code Design for Asymmetric Error Channels at a Workshop on Quantum Information Science and Engineering (QISE-2021) organized by the 41st IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS-2021) on 18 December. The other authors of this research work are Aleksandra Lipińska, Faculty of Mathematics and Computer Science, Jagiellonian University, Kraków; Shilpa Mahato, Department of Physics, Indian Institute of Technology, Dhanbad; Rijul Sachdeva, Jülich Supercomputing Center, Forschungszentrum Jülich and RWTH Aachen University; Debasmita Bhoumik; Advanced Computing & Microelectronics Unit, Indian Statistical Institute, Kolkata; Ritajit Majumdar, Advanced Computing & Microelectronics Unit, Indian Statistical Institute, Kolkata. Research work as explained by the authors:
Surface codes are quantum error correcting codes normally defined on 2D arrays of qubits. In this paper, we introduce a surface code design based on the fact that the severity of bit-flip and phase-flip errors in the physical quantum systems is asymmetric. For our proposed surface code design for asymmetric error channels, we present pseudo-threshold and threshold values in the presence of various degrees of asymmetry of Pauli X, Y, and Z errors in a depolarization channel. We show that, compared to symmetric surface codes, our asymmetric surface codes can provide almost double the pseudo-threshold rates while requiring less than half the number of physical qubits in the presence of increasing asymmetry in the error channel. We also demonstrate that as the asymmetry of the surface code increases, the advantage in the pseudo-threshold rates begins to saturate for any degree of asymmetry in the channel.
QISE-2021 was intended to evolve into a regular yearly event providing a platform to a diverse audience for learning about the recent developments in areas related to quantum science in general and quantum computing in particular.
The first edition of QISE-2021, was to give an opportunity to provide a robust exposure to students, researchers and industry practitioners to the recent developments in quantum computation, from the point of view of computer science, physics, and engineering. Apart from this QISE-2021 also wanted to familiarize the participants, especially the students, to recent quantum computing and simulation tools, e.g., with the view to introducing them to quantum machine learning.
FSTTCS 2021 is the 41st conference on Foundations of Software Technology and Theoretical Computer Science. It was organised by IARCS, the Indian Association for Research in Computing Science, in association with ACM India. It is a forum for presenting original results in foundational aspects of Computer Science and Software Technology.
Due to the Covid situation in India and the rest of the world, and to rule out uncertainty for authors and the local organizers, FSTTCS 2021 was be held virtually.
Link to the conference: https://www.fsttcs.org.in/2021/
Link to the workshop: https://acm-goa.github.io/QISE/
Link to the poster: https://drive.google.com/file/d/1oOFy22neIIRwFVP-3mSZ9iDOV3lLpGb8/view?usp=sharing