Advances in Scalability and Fault Tolerance for Bosonic Quantum Computing

Optical quantum computing offers the tantalising promise of room-temperature quantum computation and vast scalability, while bosonic modes in circuit QED have proven to be more robust to noise than the more traditional information carriers, the transmon qubits. Advances like these suggest that bosonic modes may be the best substrate for a quantum computer. Quantum computing with bosonic systems has advanced far beyond its single-photon origins to encompass more robust and interesting states of light that serve as quantum information carriers with built-in resilience to decoherence. These so-called bosonic codes, when combined with a demonstrably scalable architecture like a continuous-variable cluster state, bring fault-tolerant quantum computing with bosonic systems within reach. The missing pieces are high enough squeezing in laboratory experiments and efficient use of the available resources. In this talk, I will give an overview of recent key advances in scalability and fault tolerance for quantum computing with bosonic modes.