A light-induced phononic symmetry switch and giant dissipationless topological photocurrent in ZrTe5

L Luo, D Cheng, B Song, LL Wang, C Vaswani… - Nature Materials, 2021 - nature.com
Dissipationless currents from topologically protected states are promising for disorder-
tolerant electronics and quantum computation. Here, we photogenerate giant anisotropic …

Quantum coherence tomography of light-controlled superconductivity

L Luo, M Mootz, JH Kang, C Huang, K Eom, JW Lee… - Nature Physics, 2023 - nature.com
The coupling between superconductors and oscillation cycles of light pulses, ie, lightwave
engineering, is an emerging control concept for superconducting quantum electronics …

Lightwave-driven gapless superconductivity and forbidden quantum beats by terahertz symmetry breaking

X Yang, C Vaswani, C Sundahl, M Mootz, L Luo… - Nature …, 2019 - nature.com
Light-induced supercurrents chart a path forward for the electromagnetic design of emergent
materials phases and collective modes for quantum engineering applications. However …

Light-driven Raman coherence as a nonthermal route to ultrafast topology switching in a Dirac semimetal

C Vaswani, LL Wang, DH Mudiyanselage, Q Li… - Physical Review X, 2020 - APS
A grand challenge underlies the entire field of topology-enabled quantum logic and
information science: how to establish topological control principles driven by quantum …

Light quantum control of persisting Higgs modes in iron-based superconductors

C Vaswani, JH Kang, M Mootz, L Luo, X Yang… - Nature …, 2021 - nature.com
The Higgs mechanism, ie, spontaneous symmetry breaking of the quantum vacuum, is a
cross-disciplinary principle, universal for understanding dark energy, antimatter and …

Terahertz second-harmonic generation from lightwave acceleration of symmetry-breaking nonlinear supercurrents

C Vaswani, M Mootz, C Sundahl, DH Mudiyanselage… - Physical Review Letters, 2020 - APS
We report terahertz (THz) light-induced second harmonic generation, in superconductors
with inversion symmetry that forbid even-order nonlinearities. The THz second harmonic …

Terahertz-light quantum tuning of a metastable emergent phase hidden by superconductivity

X Yang, C Vaswani, C Sundahl, M Mootz, P Gagel… - Nature materials, 2018 - nature.com
Abstract 'Sudden'quantum quench and prethermalization have become a cross-cutting
theme for discovering emergent states of matter,,–. Yet this remains challenging in electron …

Ultrafast manipulation of topologically enhanced surface transport driven by mid-infrared and terahertz pulses in Bi2Se3

L Luo, X Yang, X Liu, Z Liu, C Vaswani… - Nature …, 2019 - nature.com
Topology-protected surface transport of ultimate thinness in three-dimensional topological
insulators (TIs) is breaking new ground in quantum science and technology. Yet a challenge …

Visualization and quantum control of light-accelerated condensates by terahertz multi-dimensional coherent spectroscopy

M Mootz, L Luo, J Wang, E Perakis - Communications Physics, 2022 - nature.com
Characterizing and controlling high-order correlation of quantum systems is key for
developing quantum devices and switching technologies. Although conventional static and …

Light control of surface–bulk coupling by terahertz vibrational coherence in a topological insulator

X Yang, L Luo, C Vaswani, X Zhao, Y Yao… - npj Quantum …, 2020 - nature.com
The demand for disorder-tolerant quantum logic and spin electronics can be met by
generating and controlling dissipationless spin currents protected by topology. Dirac …