Quantum Optics Laboratory

Abstract:

The physical implementation of Quantum Computing, which can efficiently solve certain problems considered infeasible on classical computers, is still in its infancy after the development over the last three decades. Neutral atoms in an optical lattice, with its ready scalability, is one of the promising candidates. The main challenge is to achieve high fidelities of quantum control in a large array. In this talk, I will report our new approach to single-qubit phase gates, using non-resonant microwaves to induce AC Zeeman shifts on Cs atoms in a 5x5x5 3D optical lattice. A specific sequence of non-resonant pulses and global pi-pulses on qubit transition is designed to apply controllable phase shifts on target atoms and zero net phase shifts on non-target atoms. Our roadmap toward a prototype quantum computer will also be addressed.