10/19專題演講

演講題目：Quantum technologies with infinite-dimensional quantum systems 量子元件
主講人：Prof. Chiao-Hsuan Wang 王喬萱教授
時間：112年10月19日 下午 13:20
地點：光復校區 科學三館 次軒聽

Abstract
Advents in fabricating high-quality-factor photonic and phononic cavities have led to increasing interest
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 hardwareefficient way. I will present a scheme to engineer a target Hamiltonian for photonic cavities using ancilla
qubits. By off-resonantly driving dispersively-coupled ancilla qubits, we develop an optimized approach to
engineering an arbitrary photon-number dependent (PND) Hamiltonian for the cavities while minimizing the
operation errors. The engineered Hamiltonian admits various applications, including canceling unwanted
cavity self-Kerr interactions, creating higher-order nonlinearities for quantum simulations, and designing singleand two-cavity gates resilient to noise. Our scheme can be implemented with coupled microwave cavities and
transmon qubits in superconducting circuit systems. This work paves the way for near-term applications of
noisy intermediate-scale quantum devices and the long-term goal of fault-tolerant quantum computation