IQIM Postdoctoral and Graduate Student Seminar

Abstract: Neutral atoms offer great opportunities to study fundamental science and have become a key resource for quantum technologies. In this talk, I will first discuss several architectural aspects of fault-tolerant neutral-atom quantum computers, from the realization of universal gate sets in transversal operations to executing algorithms with constant physical entropy. One limitation is atom loss occuring during entanglement gate operations and qubit readout, which can be solved by continuously loading new atoms into the quantum computer. In this context, we recently demonstrated an experimental architecture for high-rate, continuous reloading and operation of a large-scale atom array system while realizing coherent storage and manipulation of quantum information. Since atom loss rates depend on the number of applied operations, the scale of future quantum computers will depend on the reloading rate. Demonstrating a rate of 300,000 atoms in tweezers per second, we create over 30,000 initialized qubits per second, which we leverage to assemble and maintain an array of over 3,000 atoms for more than two hours. At the end of the talk, I will sligthly switch the direction and discuss several aspects of long-lange interacting Rydberg atoms. First I will discuss how these interactions can be used to engineer many-body systems, where I will focus on the recent realization of a doped t-J model. Finally, I will discuss molecular states occuring at shorter distances, which provide a great testbed for our calculations of Rydberg interactions and furthermore enable studying signatures of molecular quantum states at exceptional levels of control.

Following the talk, lunch will be provided on the lawn outside East Bridge.