Hybrid Schrödinger-Feynman Simulator#
Hybrid Schrödinger-Feynman approaches strive to use all the available memory and processing units in order to efficiently simulate quantum circuits which would (1) run into memory bottlenecks using Schrödinger-style simulation, or (2) take exceedingly long using Feynman-style path summation—eventually trading-off the respective memory and runtime requirements.
Usage in Python#
Available backends in the provider
hybrid_qasm_simulatorto simulate and sample from the resulting state
hybrid_statevector_simulatorto simulate and explicitly return the state vector (which will require an exponential amount of memory in the number of qubits)
Usage as Standalone Executable#
Please see Circuit Simulator on how to build the
ddsim_simple (the name stuck due to historical reasons ;) ) CMake target.
Launching the standalone executable with
-h parameter shows the available options (truncated to highlight the hybrid settings):
$ ./ddsim_simple --help MQT DDSIM by https://www.cda.cit.tum.de/ -- Allowed options: -h [ --help ] produce help message --seed arg (=0) seed for random number generator (default zero is possibly directly used as seed!) --shots arg (=0) number of measurements (if the algorithm does not contain non-unitary gates, weak simulation is used) --pv display the state vector as list of pairs (real and imaginary parts) --ps print simulation stats (applied gates, sim. time, and maximal size of the DD) --pm print measurement results --pcomplex print print additional statistics on complex numbers --verbose Causes some simulators to print additional information to STDERR --simulate_file arg simulate a quantum circuit given by file (detection by the file extension) --simulate_file_hybrid arg simulate a quantum circuit given by file (detection by the file extension) using the hybrid Schrodinger-Feynman simulator --hybrid_mode arg mode used for hybrid Schrodinger-Feynman simulation (*amplitude*, dd) --nthreads arg (=2) #threads used for hybrid simulation [...]
If you are using this simulator, please cite .