495 citations · 1.4k across the 14 of their papers we have counts for
14 papers
Linking entanglement and quantum phase transitions via density functional theory
L. -A. Wu, M. S. Sarandy, D. A. Lidar +1
Density functional theory (DFT) is shown to provide a novel conceptual and computational framework for entanglement in interacting many-body quantum systems. DFT can, in particular…
Holonomic quantum computation in decoherence-free subspaces
L. -A. Wu, P. Zanardi, D. A. Lidar
We show how to realize, by means of non-abelian quantum holonomies, a set of universal quantum gates acting on decoherence-free subspaces and subsystems. In this manner we bring to…
Entanglement Observables and Witnesses for Interacting Quantum Spin Systems
L. -A. Wu, S. Bandyopadhyay, M. S. Sarandy +1
We discuss the detection of entanglement in interacting quantum spin systems. First, thermodynamic Hamiltonian-based witnesses are computed for a general class of one-dimensional s…
Quantum Phase Transitions and Bipartite Entanglement
Lian-Ao Wu, Marcelo S. Sarandy, Daniel A. Lidar
We develop a general theory of the relation between quantum phase transitions (QPTs) characterized by nonanalyticities in the energy and bipartite entanglement. We derive a functio…
Reply to: ``Comment on `Polynomial-Time Simulation of Pairing Models on a Quantum Computer'''
L. -A. Wu, M. S. Byrd, D. A. Lidar
We reply to Dukelsky, et al. regarding the article: L. A. Wu, M. S. Byrd and D. A. Lidar, Phys. Rev. Lett. 89, 057904 (2002).
Dressed Qubits
L. -A. Wu, D. A. Lidar
Inherent gate errors can arise in quantum computation when the actual system Hamiltonian or Hilbert space deviates from the desired one. Two important examples we address are spin-…