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Browsing Duke Faculty Scholarship by Duke-affiliated Author "Baranger, Harold U."

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Bound on quantum computation time: Quantum error correction in a critical environment

Baranger, Harold (AMER PHYSICAL SOC, 2010)

We obtain an upper bound on the time available for quantum computation for a given quantum computer and decohering environment with quantum error correction implemented. First, we derive an explicit quantum evolution ...
Conductance of quantum impurity models from quantum Monte Carlo

Liu, Dong E.; Chandrasekharan, Shailesh; Baranger, Harold (AMER PHYSICAL SOC, 2010)

The conductance of two Anderson impurity models, one with twofold and another with fourfold degeneracy, representing two types of quantum dots, is calculated using a world-line quantum Monte Carlo (QMC) method. Extrapolation ...
Two-stage Kondo effect and Kondo-box level spectroscopy in a carbon nanotube

Bomze, Dr Yuriy; Borzenets, I.; Mebrahtu, H.; Makarovski, A.; Baranger, Harold; Finkelstein, Gleb (AMER PHYSICAL SOC, 2010)

The concept of the "Kondo box" describes a single spin, antiferromagnetically coupled to a quantum dot with a finite level spacing. Here, a Kondo box is formed in a carbon nanotube interacting with a localized electron. ...
Waveguide QED: Many-body bound-state effects in coherent and Fock-state scattering from a two-level system

Zheng, Huaixiu; Gauthier, Daniel J.; Baranger, Harold U. (Physical Review A, 2010-12-14)

Strong coupling between a two-level system (TLS) and bosonic modes produces dramatic quantum optics effects. We consider a one-dimensional continuum of bosons coupled to a single localized TLS, a system which may be realized ...