Verification of a resetting protocol for an uncontrolled superconducting qubit

Quantum resetting protocols allow a quantum system to be sent to a state in the past by making it interact with quantum probes when neither the free evolution of the system nor the interaction is controlled. We experimentally verify the simplest non-trivial case of a quantum resetting protocol, known as the $${{\mathcal{W}}}_{4}$$ W 4 protocol, with five superconducting qubits, testing it with different types of free evolutions and target–probe interactions. After projection, we obtained a reset state fidelity as high as 0.951, and the process fidelity was found to be 0.792. We also implemented 100 randomly chosen interactions and demonstrated an average success probability of 0.323 for $$\left|1\right\rangle$$ 1 and 0.292 for $$\left|-\right\rangle$$ − , and experimentally confirmed the nonzero probability of success for unknown interactions; the numerical simulated values are about 0.3. Our experiment shows that the simplest quantum resetting protocol can be implemented with current technologies, making such protocols a valuable tool in the eternal fight against unwanted evolution in quantum systems.

The 1982 Mexican Bank Statization and Unintended Consequences for the Emergence of Neoliberalism

The 1982 Mexican presidential decision to statize all domestic commercial banks was meant to reset state bank capital relations and salvage some form of state-led capitalism. However, bank statization had the counterintuitive and ultimately unintended consequence of enabling a more rapid transition to neoliberalism, financialization and market-led capitalism than otherwise may have been possible. The implications of this are profound as alternatives to neoliberalism that seek a return to state-led development are ultimately flawed without more collective, local, and substantively democratic calls for the control of credit and, hence, human development.Résumé. La décision présidentielle mexicaine de 1982 d'étatiser toutes les banques commerciales domestiques avait pour but la reconfiguration des relations capitalistes État-banque afin de récupérer une certaine forme de capitalisme étatique. Or, ce processus eu pour conséquences inattendues l'accélération de la transition au néolibéralisme, à la financiarisation et au capitalisme de marché. Les implications sont profondes pour les alternatives au néolibéralisme qui, cherchant un retour au capitalisme d'État, s'avèrent inefficaces sans un contrôle collectif, local et démocratique du crédit et, par ricochet, du développement humain.