On product, generic and random generic quantum satisfiability (2009)
Laumann, C. R., Läuchli, A. M., Moessner, R., Scardicchio, A., Sondhi, S. L.
We report a cluster of results on k-QSAT, the problem of quantum satisfiability for k-qubit projectors which generalizes classical satisfiability with k-bit clauses to the quantum setting. First we...
Field-controlled magnetic order in the quantum spin-ladder system (Hpip)2CuBr4 (2009)
Thielemann, Beni, Rüegg, Christian, Kiefer, Klaus, Rønnow, Henrik M., Normand, Bruce, Bouillot, P, ...
Direct Observation of Magnon Fractionalization in the Quantum Spin Ladder (2008)
Thielemann, B., Rüegg, Ch., Rønnow, H. M., Läuchli, A. M., Normand, B., ...
We measure by inelastic neutron scattering the spin excitation spectra as a function of applied magnetic field in the quantum spin-ladder material (C5H12N)2CuBr4. Discrete magnon modes at low fields...
Field-Controlled Magnetic Order in the Quantum Spin-Ladder System (Hpip)2CuBr4 (2008)
Thielemann, B., Rüegg, Ch., Kiefer, K., Rønnow, H. M., Normand, B., Bouillot, P., ...
Neutron diffraction is used to investigate the field-induced, antiferromagnetically ordered state in the two-leg spin-ladder material (Hpip)2CuBr4. This "classical" phase, a consequence of weak...