Xuedong Hu, PhD

305 Fronczak Hall
(716) 645-5444
xhu@buffalo.edu

• BS, Beijing University – 1989
• PhD, University of Michigan – 1996

Condensed Matter Theory

Solid state theory, with special focus on quantum coherence, dynamics, and information processing in semiconductor and superconductor nanostructures

I have worked in the interdisciplinary area of condensed matter physics and quantum optics since my PhD years.  My PhD project of studying quantum fluctuations and squeezed states of phonons in solids is one of the first in the world to explore the degree of quantum coherent control we can achieve over solid state objects.  My study of coherent control of phonon emission in quantum wells through microwave driving was another attempt at manipulating a solid state device so that it does what we would like it to do.  Since my postdoc years at the University of Maryland, my research interest has focused on quantum information processing in semiconductor nanostructures.  I have worked on quantum entanglement of electron spins and decoherence of electron and nuclear spin states.  Current research projects in my group include studying spin transfer between quantum dots, building an effective mass theory for donors in Silicon, characterizing multi-electron states in a Silicon quantum dot, coupling of dot-donor complexes in SiMOSFET, and more recently, studying electron trapping and manipulation with surface acoustic waves.             

• "Doppler effect induced spin relaxation boom", X. Zhao, P. Huang, and X. Hu, Scientific Reports 6, 23169 (2016).
• "Spin Relaxation due to Charge Noise and Spin-Valley Mixing in a Si Quantum Dot", P. Huang and X. Hu, Physical Review B 90, 235315 (2014).
• "Resonant Adiabatic Passage with Three Qubits", S. Oh, Y.P. Shim, J.J Fei, M. Friesen, and X. Hu, Physical Review A  87, 022332 (2013).
• "Spin relaxation of P-dimer electrons in Silicon", M. Borhani and X. Hu, Phys. Rev. B 82, 241302 (RC) (2010).
• "Charge fluctuation induced dephasing of exchange coupled spin qubits", X. Hu and S. Das Sarma, Phys. Rev. Lett. 96, 100501 (2006). 
• "Exchange in silicon based quantum computer architecture", B. Koiller, X. Hu and S. Das Sarma, Phys. Rev. Lett. 88, 027903 (2002).