Speaker:  Erez Berg (Weizmann Institute of Science) Title:  Preparing topological ground states on quantum simulators Abstract:  We propose an efficient protocol for preparing low energy states of arbitrary fermionic Hamiltonians on a noisy bosonic quantum simulator. This procedure involves performing adiabatic cooling by coupling the target system with a simulated bath. The bath is periodically monitored in order to extract entropy from the system. By fermionizing the simulated target system and the bath together, we allow individual fermionic excitations of the system to coherently hop to the bath sites. In this way, we achieve a cooling rate linearly proportional to the density of these excitations, despite the fact that they are non-local in terms of the bosonic degrees of freedom of the hardware. In particular, we show that certain topological phases, such as the chiral (non-Abelian) phase of the Kitaev honeycomb model can be prepared efficiently using our protocol. We find that our protocol performs favorably in the presence of noise, making it suitable for execution on near-term quantum devices.
*You will need to bring your cell phone, so you can sign in using the QR code outside of ATL 2400. Â You will need to submit your first and last name, email, and affiliation on the form by 11:15am to be able to get lunch after the seminar. Â Lunch is first come, first served.*
At 4pm, there will be a tea in ATL 2117 for our speaker and students/postdocs - this is a chance to ask questions directly to our speaker. Refreshments will be served.