"Measuring microwave distortions and doing quantum error correction with angular ..." Jonathan Gross скачать в хорошем качестве

"Measuring microwave distortions and doing quantum error correction with angular ..." Jonathan Gross

Speaker: Jonathan Gross, Quantum-Computing Research at Google Title: Measuring microwave distortions and doing quantum error correction with angular momentum Abstract: This talk will span the extreme ends of the research I currently do: 1. low level characterization of device properties with quantum experiments, and 2. quantum error correcting codes designed around the physics of angular momentum. In the first part of the talk, I will present a technique for measuring the frequency response for microwave signals used to drive qubits, including the use of parametric oscillations to measure the phase response with previously unrealized Heisenberg precision. In the second part, I will introduce a generalization of bosonic quantum error correction codes to systems with angular momentum, showing how to use symmetries of subgroups of SU(2) to correct against small rotational errors and implement transversal logical unitaries with Hamiltonians linear in angular-momentum operators.