Probing Many-Body Correlations in Superconducting Circuits

The quest to build quantum computers using superconducting circuits has led to tremendous advances in fabrication capabilities. These circuits are increasingly being used for other applications, notably the realization of engineered quantum many-body systems. In so-called analog quantum simulations, a many-body Hamiltonian is realized through specific couplings in the circuit. A challenge in this approach is identifying the states being realized in these open quantum systems. In this talk, I will describe superconducting circuit designs capable of accessing many-body correlation functions. For example, in one particular design, many-body anomalous correlation functions can be obtained from the spectral analysis of current in the read-out circuit. Such measurements can pinpoint photon pair correlations.