Speaker: Harry Levine, Graduate Student, Lukin Group, Harvard University
Title: Quantum simulation and quantum computation with programmable Rydberg atom arrays

Abstract: Neutral atom arrays form a powerful platform for studying and coherently controlling many-body quantum systems. These arrays can be readily scaled to hundreds of individually controlled atoms with flexible, programmable geometries. Strong atomic interactions can be introduced by coherent excitation to Rydberg states, resulting in a rich spin Hamiltonian with variable interaction range, as well as tools for quantum information processing. In this talk, I will discuss two applications of coherent control over 1D atom arrays to create and benchmark entangled states. In the first, we utilize the Rydberg Hamiltonian to globally drive a 20 atom array into a fully entangled Schrödinger cat state. In the second, we introduce a new protocol for a universal two-qubit gate on neutral atoms, and demonstrate its parallel implementation on several pairs of qubits. Finally, I will discuss our ongoing work scaling our system to 2D arrays of hundreds of qubits, including preliminary results exploring the phase diagram of 2D arrays as well as applications to graph theory optimization problems.

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