Continuous-variable quantum state tomography with convex optimization

Experimental heterodyne data courtesy of Yong Lu, publication [1]. See (non-interactive) notebooks data_cvx_heterodyne_N4.html and data_cvx_heterodyne_N8.html rendered here (N4) and here (N8). Note: histograms must be properly normalized.

Experimental Wigner tomography data courtesy of Marina Kudra, publication [2]. See (non-interactive) notebook data_cvx_wigner_tomography.html rendered here. Compare with CGAN [3].

.ipynb notebooks can be run on Binder or downloaded and run locally.

• arXiv preprint link.
• Published version link.

References

[1] Propagating Wigner-Negative States Generated from the Steady-State Emission of a Superconducting Qubit. Yong Lu, Ingrid Strandberg, Fernando Quijandría, Göran Johansson, Simone Gasparinetti, Per Delsing Phys. Rev. Lett. 126, 253602 (2021) Journal, arXiv

[2] Robust preparation of Wigner-negative states with optimized SNAP-displacement sequences. Marina Kudra, Mikael Kervinen, Ingrid Strandberg, Shahnawaz Ahmed, Marco Scigliuzzo, Amr Osman, Daniel Pérez Lozano, Giulia Ferrini, Jonas Bylander, Anton Frisk Kockum, Fernando Quijandría, Per Delsing, Simone Gasparinetti arXiv:2111.07965

[3] Quantum state tomography with conditional generative adversarial networks, Shahnawaz Ahmed. GitHub repo