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qutip / qutip-notebooks

A collection of IPython notebooks using QuTiP: examples, tutorials, development test, etc.
BSD 3-Clause "New" or "Revised" License
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Example error regarding piqs #151

Open Htxxxg opened 1 year ago

Htxxxg commented 1 year ago

Hey: I am trying to learn PIQS, but I encountered some unpleasant errors while running the examples. The example path is: https://nbviewer.org/github/qutip/qutip-notebooks/blob/master/examples/piqs-overview.ipynb . The location is 1. N Qubits Dynamics. When running to the In [4] code block, an error occurred: RuntimeError: Factor is exactly singular.

Htxxxg commented 1 year ago

I was able to successfully run on my personal laptop when setting the system dimension N=5, but when the dimension increases, I will report an error: singular matrix. Can a system with a larger N be calculated using a more powerful computer? `QuTiP: Quantum Toolbox in Python

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QuTiP Version: 4.7.1 Numpy Version: 1.23.5 Scipy Version: 1.10.0 Cython Version: None Matplotlib Version: 3.7.0 Python Version: 3.10.9 Number of CPUs: 8 BLAS Info: INTEL MKL OPENMP Installed: False INTEL MKL Ext: False Platform Info: Windows (AMD64) Installation path: D:\software\Anaconda\lib\site-packages\qutip

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