Ahmed Khalifa

Condensed Matter Physicist

About Me

Ahmed Khalifa

I am a physicist working on strongly correlated quantum systems, with a focus on two-dimensional materials such as graphene and moiré heterostructures, as well as programmable quantum simulators like Rydberg atom arrays. My research combines analytical theory and large-scale numerical methods to explore emergent quantum phases, their excitations, and their dynamics. I am broadly interested in understanding how collective behavior arises from simple microscopic interactions, with implications for quantum information science and novel quantum materials. I received my PhD from Univeristy of Kentucky in 2023 and am currently a postdoctoral scholar at Carnegie Mellon Univeristy.

Publications

Strong Correlation Driven Quadrupolar to Dipolar Exciton Transitions in a Trilayer Moiré Superlattice

Yuze Meng, Lei Ma, Li Yan, Ahmed Khalifa, Dongxue Chen, Shuai Zhang , Rounak Banerjee , Takashi Taniguchi , Kenji Watanabe , Seth Ariel Tongay , Benjamin Hunt , Shi-Zeng Lin, Wang Yao , Yong-Tao Cui, Shubhayu Chatterjee , Su-Fei Shi
Nature Photonics, Pages 1-6 (2025)
[PDF]

Field-Induced Magnon Decays in Dipolar Quantum Magnets

Andrew D. Kim, Ahmed Khalifa, Shubhayu Chatterjee
Phys. Rev. Lett. 135, 046703 (2025)
[PDF]

Spin-orbital magnetism in moiré Wigner molecules

Ahmed Khalifa, Rokas Veitas, Francisco Machado, Shubhayu Chatterjee
arXiv:2507.06307 (2025)
[PDF]

Dirac spin liquid in quantum dipole arrays

Marcus Bintz, Vincent S. Liu, Johannes Hauschild, Ahmed Khalifa, Shubhayu Chatterjee, Michael P. Zaletel, Norman Y. Yao
arXiv:2406.00098 (2024)
[PDF]

Lattice model for the quantum anomalous Hall effect in moiré graphene

Ahmed Khalifa, Ganpathy Murthy, and Ribhu K. Kaul
Phys. Rev. B 107, 235137 (2023)
[PDF]

Absence of edge states in the valley Chern insulator in moiré graphene

Ahmed Khalifa, Ganpathy Murthy, and Ribhu K. Kaul
Phys. Rev. B 107, 085138 (2023)
[PDF]

Weyl Semimetal Path to Valley Filtering in Graphene

Ahmed Khalifa, Ribhu K. Kaul, Efrat Shimshoni, H. A. Fertig, and Ganpathy Murthy
Phys. Rev. Lett. 127, 126801 (2021)
[PDF]

Contact

Email: ahmedk at andrew dot cmu dot edu

Google Scholar: Ahmed Khalifa