Version 1.3 Release

This release adds the option to use quantum teleportation to complement swaps in the mapping process.

Version 1.2.1 Release

This minor release mainly fixes three issues

• The initial layout and output permutation were not tracked correctly in the heuristic mapper
• The initial_layout and layering settings of the compile function where not passed correctly to the underlying Python bindings
• Wheels were built with -march=native -mtune=native. This caused incompatibilities/invalid instructions whenever used under a different architecture. These settings are now only used when building on the host system.

It also includes major under-the-hood changes to the CMake structure of the project.

Version 1.2 Release

This release adds Python bindings to the JKQ QMAP project. Using the tool from Python is now as easy as calling

from jkq import qmap

qmap.compile(circ, arch, ...)

where circ is either a Qiskit QuantumCircuit object or the path to an input file (supporting various formats, such as .qasm, .real,...)
and arch is either one of the pre-defined architectures (see below) or the path to a file containing the number of qubits and a line-by-line enumeration of the qubit connections. (Note that circuits are still assumed to be already decomposed into 1- and 2-qubit gates.)

Architectures that are available per default (under qmap.Arch.<...>) include:

• IBM_QX4 (5 qubit, directed bow tie layout)
• IBM_QX5 (16 qubit, directed ladder layout)
• IBMQ_Yorktown (5 qubit, undirected bow tie layout)
• IBMQ_London (5 qubit, undirected T-shape layout)
• IBMQ_Bogota (5 qubit, undirected linear chain layout)

Whether the heuristic (default) or the exact mapper is used can be controlled by passing method=qmap.Method.heuristic or method=qmap.Method.exact to the compile function.

All available parameters are shown in the README.md.

Note that in order for the bindings to work the SMT Solver Z3 >= 4.8.3 has to be installed on the system and the dynamic linker has to be able to find the library.

• Under Ubuntu 20.04 and newer: sudo apt-get install z3
• Under macOS: brew install z3
• Alternatively: pip install z3-solver and then append the corresponding path to the library path (LD_LIBRARY_PATH under Linux, DYLD_LIBRARY_PATH under macOS), e.g. via

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$(python -c "import z3; print(z3.__path__[0]+'/lib')")

• Download pre-built binaries from https://github.com/Z3Prover/z3/releases and copy the files to the respective system directories
• Build Z3 from source and install it to the system