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NnktYoshioka merged 2 commits into from
Aug 13, 2025
Merged

Calculate the default working precision from the given error tolerance #6

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1f54457
Calculate the default working precision from the given error tolerance
jlapeyre Aug 7, 2025
d562df9
Update __main__.py
NnktYoshioka Aug 13, 2025
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7 changes: 4 additions & 3 deletions README.md
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Expand Up @@ -40,7 +40,8 @@ python -m pygridsynth <theta> <epsilon> [options]

### Options

- `--dps`: Sets the calculation precision (default: `128`).
- `--dps`: Sets the working precision of the calculation. If `--dps` is not given, then the working precision will
be calculated from `epsilon`.
- `--dtimeout`, `-dt`: Sets the timeout for solving diophantine equations in milliseconds (default: `200`).
- `--ftimeout`, `-ft`: Sets the timeout for factorization in milliseconds (default: `50`).
- `--verbose`, `-v`: Enables detailed output.
Expand All @@ -50,7 +51,7 @@ python -m pygridsynth <theta> <epsilon> [options]
### Example Execution

```bash
python -m pygridsynth 0.5 1e-50 --dps 256 --verbose --time
python -m pygridsynth 0.5 1e-50 --verbose --time
```

This command will:
Expand Down Expand Up @@ -89,4 +90,4 @@ This project is licensed under the GNU General Public License v3 or later.
- Neil J. Ross and Peter Selinger. Optimal ancilla-free Clifford+T approximation of z-rotations, 2016.
- Peter Selinger. Efficient Clifford+T approximation of single-qubit operators, 2014.
- Peter Selinger and Neil J. Ross. Exact and approximate synthesis of quantum circuits. https://www.mathstat.dal.ca/~selinger/newsynth/, 2018.
- Vadym Kliuchnikov, Dmitri Maslov, and Michele Mosca. Fast and efficient exact synthesis of single qubit unitaries generated by Clifford and T gates, 2013.
- Vadym Kliuchnikov, Dmitri Maslov, and Michele Mosca. Fast and efficient exact synthesis of single qubit unitaries generated by Clifford and T gates, 2013.
11 changes: 8 additions & 3 deletions pygridsynth/__main__.py
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Expand Up @@ -9,18 +9,23 @@ def main():

parser.add_argument('theta', type=str)
parser.add_argument('epsilon', type=str)
parser.add_argument('--dps', type=int, default=128)
parser.add_argument('--dps', type=int, default=None)
parser.add_argument('--dtimeout', '-dt', type=int, default=200)
parser.add_argument('--ftimeout', '-ft', type=int, default=50)
parser.add_argument('--verbose', '-v', action='store_true')
parser.add_argument('--time', '-t', action='store_true')
parser.add_argument('--showgraph', '-g', action='store_true')

args = parser.parse_args()
epsilon1 = mpmath.mpmathify(args.epsilon)
dps_of_result = -mpmath.log10(epsilon1)
# Use the same heuristic as Haskell gridsynth for setting dps
if args.dps is None:
args.dps = 15 + 2.5 * dps_of_result
mpmath.mp.dps = args.dps
epsilon = mpmath.mpmathify(f"{args.epsilon}")
mpmath.mp.pretty = True
theta = mpmath.mpmathify(args.theta)
epsilon = mpmath.mpmathify(args.epsilon)
theta = mpmath.mpmathify(f"{args.theta}")

gates = gridsynth_gates(theta=theta, epsilon=epsilon,
verbose=args.verbose, measure_time=args.time,
Expand Down