RydOpt 0.1.0

Multiqubit Rydberg Gate Optimizer

RydOpt - A Multiqubit Rydberg Gate Optimizer

RydOpt is a Python package for the optimization of laser pulses implementing two- and multiqubit Rydberg gates in neutral atom quantum computing platforms. The opimization methods support GPUs and multi-core CPUs, using an efficient implementation based on JAX.

Install the software with pip (requires Python ≥ 3.10, for enabling GPU support and tips see our extended installation instructions):

pip install rydopt

Documentation and Minimal Usage Example

The package documentation can be found at https://rydopt.readthedocs.io/.

To get an idea how the software is used, we provide in the following a minimal usage example. The code optimizes a pulse to realize a CZ gate on two atoms in the perfect blockade regime.

import rydopt as ro
import numpy as np

# Want to perform a CZ gate on two atoms in the perfect blockade regime; no Rydberg state decay
gate = ro.gates.TwoQubitGate(phi=None, theta=np.pi, Vnn=float("inf"), decay=0.0)

# Pulse ansatz: constant detuning, sweep of the laser phase according to sin_crab ansatz
pulse_ansatz = ro.pulses.PulseAnsatz(detuning_ansatz=ro.pulses.const, phase_ansatz=ro.pulses.sin_crab)

# Initial pulse parameter guess
initial_params = (7.0, (0.0,), (0.0, 0.0), ())

# Optimize the pulse parameters
opt_result = ro.optimization.optimize(gate, pulse_ansatz, initial_params, tol=1e-10)
optimized_params = opt_result.params

# Plot the pulse
ro.characterization.plot_pulse(pulse_ansatz, optimized_params)

Citing RydOpt

If you find this library useful for your research, please cite:

David F. Locher, Josias Old, Katharina Brechtelsbauer, Jakob Holschbach, Hans Peter Büchler, Sebastian Weber, and Markus Müller, Multiqubit Rydberg Gates for Quantum Error Correction (publication pending)

License

The RydOpt software is licensed under the MIT License.