Exploring Quantum Simulations with Superconducting Circuits

The high level of control achievable over quantized degrees of freedom have turned superconducting circuits into one of the prime physical architectures for quantum computing and simulation. While conventional approaches mostly rely on unitary time evolution more recently open-system dynamics are considered for quantum information processing and simulations as well. In this talk, I will first give an introduction to superconducting quantum circuits. Then I will discuss a set of experiments in which we simulated the physics of interacting spins using a digital approach. In a second set of experiments we made use of an open cavity quantum electrodynamics (QED) system with tunable interactions to simulate the ground state of an interacting Bose gas confined in one dimension. These experiments rely on our ability to efficiently measure higher order photon correlations of propagating microwave fields. To facilitate these measurements we developed a quantum limited amplifier achieving phase-preserving amplification at large bandwidth and high dynamic range. Our results demonstrate an alternative path towards simulating complex quantum many-body physics based on the controlled generation and detection of nonclassical radiation in open quantum systems.

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Speaker Andreas Wallraff, ETH Zurich
Time Wednesday | August 10, 2016 | 11:00am - 12:00pm