Honors & Awards
Mayfield Fellowship (SGF), Stanford University (May 2015)
Movius Scholarship, California Institute of Technology (September 2010)
Education & Certifications
BSc, California Institute of Technology, Physics (2014)
Current Research and Scholarly Interests
I am interested in developing tools and frameworks for engineering and understanding hybrid quantum systems. In particular, I am interested in novel on-chip platforms with applications in quantum information processing, quantum communication, and fundamental research. I work on the design, fabrication, and characterization of nanoscale devices that integrate, on a single chip, superconducting microwave circuits, nanomechanical resonators, and photonic crystals.
- Lithium niobate piezo-optomechanical crystals OPTICA 2019; 6 (7): 845–53
Resolving the energy levels of a nanomechanical oscillator.
2019; 571 (7766): 537–40
The quantum nature of an oscillating mechanical object is anything but apparent. The coherent states that describe the classical motion of a mechanical oscillator do not have a well defined energy, but are quantum superpositions of equally spaced energy eigenstates. Revealing this quantized structure is only possible with an apparatus that measures energy with a precision greater than the energy of a single phonon. One way to achieve this sensitivity is by engineering a strong but nonresonant interaction between the oscillator and an atom. In a system with sufficient quantum coherence, this interaction allows one to distinguish different energy eigenstates using resolvable differences in the atom's transition frequency. For photons, such dispersive measurements have been performed in cavity1,2 and circuit quantum electrodynamics3. Here we report an experiment in which an artificial atom senses the motional energy of a driven nanomechanical oscillator with sufficient sensitivity to resolve the quantization of its energy. To realize this, we build a hybrid platform that integrates nanomechanical piezoelectric resonators with a microwave superconducting qubit on the same chip. We excite phonons with resonant pulses and probe the resulting excitation spectrum of the qubit to observe phonon-number-dependent frequency shifts that are about five times larger than the qubit linewidth. Our result demonstrates a fully integrated platform for quantum acoustics that combines large couplings, considerable coherence times and excellent control over the mechanical mode structure. With modest experimental improvements, we expect that our approach will enable quantum nondemolition measurements of phonons4 and will lead to quantum sensors and information-processing approaches5 that use chip-scale nanomechanical devices.
View details for DOI 10.1038/s41586-019-1386-x
View details for PubMedID 31341303
- Quantum Dynamics of a Few-Photon Parametric Oscillator PHYSICAL REVIEW X 2019; 9 (2)
- Superconducting circuit quantum computing with nanomechanical resonators as storage QUANTUM SCIENCE AND TECHNOLOGY 2019; 4 (1)
High-quality Lithium Niobate Optomechanical Crystal
View details for Web of Science ID 000482226300036
Quantum Acoustics with Lithium Niobate Nanocavities
View details for Web of Science ID 000482226300008
- Coupling a Superconducting Quantum Circuit to a Phononic Crystal Defect Cavity PHYSICAL REVIEW X 2018; 8 (3)
High-Q photonic resonators and electro-optic coupling using silicon-on-lithium-niobate
Future quantum networks, in which superconducting quantum processors are connected via optical links, will require microwave-to-optical photon converters that preserve entanglement. A doubly-resonant electro-optic modulator (EOM) is a promising platform to realize this conversion. Here, we present our progress towards building such a modulator by demonstrating the optically-resonant half of the device. We demonstrate high quality (Q) factor ring, disk and photonic crystal resonators using a hybrid silicon-on-lithium-niobate material system. Optical Q factors up to 730,000 are achieved, corresponding to propagation loss of 0.8 dB/cm. We also use the electro-optic effect to modulate the resonance frequency of a photonic crystal cavity, achieving a electro-optic modulation coefficient between 1 and 2 pm/V. In addition to quantum technology, we expect that our results will be useful both in traditional silicon photonics applications and in high-sensitivity acousto-optic devices.
View details for DOI 10.1038/srep46313
View details for Web of Science ID 000399157100001
View details for PubMedID 28406177
- Engineering interactions between superconducting qubits and phononic nanostructures PHYSICAL REVIEW A 2016; 94 (6)