Quantum computing for CS students: open source software
- 1. Quantum Computing for CS students: open source software Bruno FEDRICI, PhD 23/05/19 – EPITECH Lyon
- 2. Q-computer or Q-accelerator ? Heterogeneous multicore architecture: Your application has to be compiled for four different instruction sets (CPU, FPGA, GPU, QPU)
- 3. Blocks of a quantum computer As for classical computers, when we build a quantum computer, we need to integrate different kinds of technologies to be able to interact with the machine:
- 4. Main models of quantum computation Discrete variables (qbits) or continuous variables (qmodes) quantum circuit model: Adiabatic quantum computation (won't be discussed today): Problem definition Quantum algorithm Quantum circuit Quantum compiler Quantum processor Quantum simulator Full-stack Problem definition Encoding into Ising type Hamiltonian Quantum annealer Classical solver Full-stack Minor graph embedding
- 5. Quantum circuit model of computation Discrete variables (qbits) or continuous variables (qmodes) quantum circuit model: Problem definition Quantum algorithm Quantum circuit Quantum compiler Quantum processor Quantum simulator e.g. Integer factorisation Do While StopCiteria is not satisfied: Initialise X Do until Y Update Z End do End do Full-stack
- 6. Overview of quantum software projects
- 7. Projects range of applicability
- 8. IBM QX: Circuit composer (GUI) Design your quantum circuit thanks to the composer… :
- 9. IBM QX: Circuit composer (GUI) ...then run it on a quantum computer simulator or an actual QPU:
- 10. IBM QX: Circuit composer (GUI) ...then run it on a quantum computer simulator or an actual QPU: The compiler reshaped our circuit to make it compatible with actual hardware configuration as discussed in previous slides (Quantum compiler step) Don't forget ! Quantum theory is an intrinsically probabilistic theory so we need to run our experience multiple times to get statistical significance
- 11. IBM QX: Circuit composer (GUI) Finally get the result: We obtained a 2-qbit entangled state as expected when applying an Hadamard gate on a control qbit followed by a CNOT gate !
- 12. IBM QX: Processor design & performances 5-qbits processor:
- 13. IBM QX: Processor design & performances 5-qbits processor:
- 14. IBM QX: QISKit (pythonic version) Quantum teleportation protocol (see previous lesson) case study:
- 15. IBM QX: QISKit (pythonic version) Follow tutorials and implement your own code in the QISKit (Jupyter) notebook environment or on your own machine (see QISKit documentation for how to proceed) :
- 16. Further readings and resources Fingerhuth, Mark; Babej, Tomáš; Wittek, Peter (2018). Open source software in quantum computing. arXiv:1812.09167v1 LaRose, Ryan (2019). Overview and Comparison of Gate Level Quantum Software Platforms. arXiv:1807.02500v2 IBM Q Experience documentation QISKit documentation Cross, Andrew W.; Bishop, Lev S.; Smolin, John A.; Gambetta, Jay M. (2017). Open Quantum Assembly Language. arXiv:1707.03429v2 D-Wave System documentation (to discover the adiabatic approach, an approach specifically designed to tackle optimization problem thanks to the adiabatic theorem) Q-Stack (Q version of StackOverflow) is your best friend !