Towards a scalable QRAM architecture based on coupled bosonic modes

Quantum random access memory (QRAM) allows the user to query a database (of classical or quantum data) in superposition. Access to QRAM is required for many quantum algorithms to claim a speedup over their classical counterparts. Such quantum algorithms include Grover's search, quantum chemistry algorithms and quantum machine-learning algorithms, to name a few. In this talk we present a proposal for realizing QRAM based on an architecture of coupled bosonic modes. We describe novel protocols and gate schemes required for scaled-up QRAM devices while leveraging and improving upon previously developed technologies such as the necessary controlled-SWAP (CSWAP) operation. The proposal is believed to be experimentally feasible and within the reach of near-term devices.