Research

🔬 Research Overview

My research focuses on uncovering and engineering the strange but powerful behaviors of quantum and photonic systems under non-equilibrium conditions. I explore how coherence, the defining trait of quantum systems, can survive—even thrive—in the presence of dissipation, disorder, and strong driving forces. These conditions, typically thought to destroy quantum behavior, can instead give rise to new phenomena with potential applications in quantum computing, spintronics, and ultrafast photonics.

Across different platforms—from quantum circuits and molecular magnets to chiral molecules and epsilon-near-zero (ENZ) materials—I combine rigorous theoretical modeling with advanced computational techniques like tensor networks and microscopic simulations to address questions at the frontier of quantum science.

🌟 Three Interconnected Research Directions

1. Quantum Dynamics Beyond Equilibrium: Time Crystals, Entanglement, and Noisy Quantum Circuits

In realistic quantum devices, noise and environment-induced dissipation are unavoidable. I study how these factors interact with periodic driving to create emergent phases of matter such as discrete time crystals, where systems respond at a frequency lower than the drive. Using platforms like semiconductor quantum dots and molecular magnets, I’ve proposed routes to observe time-crystalline behavior in real transport experiments and identified how many-body localization and symmetry breaking can protect quantum coherence. In parallel, I simulate monitored and noisy quantum circuits to understand entanglement transitions and investigate when classical methods can accurately emulate quantum devices, thus guiding both algorithm and hardware development.

Publications: ACS Nano 18, 41, 27988–27996 (2024), Quantum 8, 1392 (2024), Phys. Rev. B 109, 165408 (2024), Nano Letts. 22, 11, 4445–4451 (2022), Comm. Phys. 5, 155 (2022).

2. Chirality-Induced Spin Selectivity: A New Spintronic Frontier

A fascinating aspect of quantum transport is the ability of chiral molecules to filter electron spins without any magnetic field — a phenomenon called Chirality-Induced Spin Selectivity (CISS). I aim to build a microscopic, interaction-based theory of CISS that works even in electrode-free systems, such as photo-excited donor-bridge-acceptor complexes. My models aim to go beyond conventional spin-orbit coupling explanations, incorporating electron-electron and electron-phonon interactions, and show how spin selectivity can emerge from internal quantum dynamics. This line of work has far-reaching implications, not just in quantum spintronics but also in bio-inspired sensing mechanisms, like magnetoreception.

Publication: J. Chem. Phys. 159, 014106 (2023)

3. Ultrafast Photonics in Epsilon-Near-Zero Materials and Time-Varying Media

The third pillar of my research focuses on nonlinear optical phenomena in ENZ materials, which exhibit near-zero permittivity at certain wavelengths and can dramatically enhance light–matter interactions. My work develops microscopic models of few-cycle optical pulse interactions with ENZ materials, going beyond the standard adiabatic approximations. These models reveal how non-adiabatic electron dynamics, field-induced band reshaping, and transient population inversions influence second- and higher-harmonic generation (SHG, HHG). By tuning parameters like electron density, film thickness, and nanostructure geometry, I aim to guide the theoretical design of next-generation ultrafast photonic devices, including time-crystalline metamaterials and optical switches.

Publications: Phys. Rev. Applied 19, 044043 (2023), Phys. Rev. Applied 19, 014005 (2023), New J. Phys. 24 053008 (2022).

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