YQI Colloquium - Shruti Puri - Université de Sherbrooke - Quantum Ising machines with parametrically modulated nonlinear oscillators

Event time: 
Thursday, October 13, 2016 - 11:00am to 12:00pm
Yale Quantum Institute (YQI) See map
17 Hillhouse Avenue
New Haven 06511
(Location is wheelchair accessible)
Event description: 

Quantum annealing exploits quantum fluctuations to solve combinatorial optimization problems that can be encoded into the couplings of Ising Hamiltonians. In this talk, I will introduce a new paradigm for quantum annealing that relies on continuous variable states. In this approach, quantum information is encoded in two coherent states of the field that are stabilized by two-photon driving in a nonlinear resonator. To motivate the underlying physics, I will first present an approach to prepare high-fidelity cat states in this system. I will then outline an adiabatic annealing protocol in an all-to-all connected network of nonlinear resonators. Numerical simulations indicate substantial resilience to photon loss in this system. Finally, I will discuss realizations of these ideas in superconducting circuits.