演講主題：Quantum Technologies with Infinite-Dimensional Quantum Systems
Advents in fabricating high quality-factor photonic and phononic cavities have led to increasing interests in quantum computation with bosonic systems. In contrast to traditional methods of encoding quantum information in multi-qubit systems, efforts in bosonic quantum computation exploit the infinite-dimensional Hilbert space of a quantum harmonic oscillator to process and transmit quantum information in a hardware-efficient way. For bosonic quantum computation, I will present a scheme to engineer a target Hamiltonian for photonic cavities using ancilla qubits. The engineered Hamiltonian admits various applications including canceling unwanted cavity self-Kerr interactions, creating higher-order nonlinearities for quantum simulations, and designing single- and two-cavity gates resilient to noise.
For bosonic quantum communication, I will discuss high-performance quantum transducers that can faithfully convert quantum information between disparate physical carriers. By using the continuous-time quantum capacities of bosonic pure-loss channels as benchmarks, we investigate the optimal designs of generic quantum transduction schemes and show that the highest quantum communication rate is achieved by transducers with a maximally flat conversion frequency response, analogous to Butterworth electric filters.