Hybrid Circuit Quantum Electrodynamics Landau-Zener Interferometry Nanowire Synthesis Nitrogen Vacancy Centers in Diamond Single Charge Coherence Spin-Momentum Locking in Topological Insulators Spin-Orbit Qubits Ultra-Coherent Spin Qubits
Our research focuses on quantum control of nanometer scale systems. Semiconductor quantum dots are used to isolate single electron spins, which exhibit long quantum coherence times. These systems allow quantum mechanics to be harnessed in a solid state environment for the implementation of quantum gates. We use nanofabrication to create artificially structured systems with experimentally tunable Hamiltonians that can be controlled on sub-nanosecond timescales. Recent research examines strong light-matter interactions in the circuit quantum electrodynamics architecture, with a goal of generating long-range many body entanglement. Silicon and diamond are ideal host materials for spin coherence, leading to spin coherence times that now approach 10 seconds. A major effort in the group consists of developing a scalable quantum computing architecture in isotopically purified silicon. Research advances are enabled by a tight feedback loop that links nanoscale materials synthesis and advanced transport measurements.

 Recent Publications

Phonon-assisted gain in a semiconductor double quantum dot maser

M. J. Gullans, Y.-Y. Liu, J. Stehlik, J. R. Petta, J. M. Taylor
Phys. Rev. Lett. 114, 196802 (2015)

Semiconductor double quantum dot micromaser

Y.-Y. Liu, J. Stehlik, C. Eichler, M. J. Gullans, J. M. Taylor, and J. R. Petta
Science 347, 285 (2015)

Large anomalous Hall effect in ferromagnetic insulator-topological insulator heterostructures

L. D. Alegria, H. Ji, N. Yao, J. J. Clarke, R. J. Cava, and J. R. Petta
Appl. Phys. Lett. 105, 053512 (2014)

Highly tunable formation of nitrogen-vacancy centers via ion implantation

S. Sangtawesin, T. O. Brundage, Z. J. Atkins, J. R. Petta
Appl. Phys. Lett. 105, 063107 (2014)

Photon emission from a cavity-coupled double quantum dot

Y.-Y. Liu, K. D. Petersson, J. Stehlik, J. Taylor, J. R. Petta
Phys. Rev. Lett. 113, 036801 (2014)

Fast room-temperature phase gate on a single nuclear spin in diamond

S. Sangtawesin, T. O. Brundage, J. R. Petta
Phys. Rev. Lett. 113, 020506 (2014)

Extreme harmonic generation in an electrically driven spin qubit

J. Stehlik, M. D. Schroer, M. Z. Maialle, M. H. Degani, J. R. Petta
Phys. Rev. Lett. 112, 227601 (2014)