Entangling gates in the 2-qubit workspace

This workspace permits you to create drop-in replacements for multi-qubit control operations which are robust to decoherence and control errors. Here you can analyze the performance of non-trivial multi-qubit entangling gates in the presence of time-dependent noise and create optimized controls which suppress dominant sources of error. Using our new tools you can even visualize the dynamic evolution of an entangled state.

We retain a close tie to the underlying physical architecture employed in realizing a multi-qubit gate - this is because the physical interaction used to produce the effective logical transformation varies widely between different qubit technologies. We therefore provide different workflows for entangling gates in superconducting qubits and trapped ions but restrict our attention to two-qubit gates (for more complex level structures consider the forthcoming Qudit workspace).

Key features in this workspace include the ability to:

  • Determine the form of two-qubit entangling gate you wish to implement. Choose from the Molmer-Sorensen, Parametrically Driven, or Cross-Resonance gate.
  • Select error-robust controls from a library of solutions that the Q-CTRL team has developed
  • Explore the effect of controls using interactive visualizations capturing both separable and entangled states, alongside easily accessible charts
  • Calculate the noise susceptibility of your controls in the filter function formalism for dominant noise processes
  • Define or upload noise power spectra for use in analyses capturing real laboratory environments
  • Optimize controls for your noise using a machine-learning toolkit [forthcoming]
  • Perform error budgeting to identify the best controls for your system
  • Output the control waveforms in either simplified forms or detailed JSON files


Comprehensive knowledge base of quantum control theory