Institut quantique

Oct 11, 2024 | link.aps.org | Lu Chen |Institut quantique |Département de Physique |Université de Sherbrooke

Popular Summary The conventional thermal Hall effect—the thermal analog of the electrical Hall effect—is a powerful technique to probe neutral excitations in various quantum materials. Typically, the effect describes the emergence of a heat current perpendicular to a thermal gradient after the introduction of an orthogonal magnetic field.

Jul 2, 2024 | link.aps.org | Institut quantique |Département de Physique |Université de Sherbrooke

Universal quantum computers require a large network of qubits robust against errors. Recent theoretical and experimental studies on donor nuclear spins in silicon, engineered on semiconductor platforms compatible with industrial fabrication, show their coherent behavior and potential for scalability. Here we present a hardware-efficient quantum protocol that corrects phase flips of a nuclear spin using explicit experimentally feasible operations.

Apr 15, 2024 | link.aps.org | Département de Physique |Institut quantique |Université de Sherbrooke |Stony Brook

Abstract In cosmology, the axion is a hypothetical particle that is currently considered as candidate for dark matter. In condensed matter, a counterpart of the axion (the “axion quasiparticle”) has been predicted to emerge in magnetoelectric insulators with fluctuating magnetic order and in charge-ordered Weyl semimetals. To date, both the cosmological and condensed-matter axions remain experimentally elusive or unconfirmed.

Apr 2, 2024 | usherbrooke.ca | Institut quantique

Le 28 mars, M. Éric Lamouroux, consul général de France à Québec, a nommé le professeur Louis Taillefer au grade de Chevalier de l’Ordre des Palmes Académiques. Cette distinction est destinée à honorer les mérites des individus qui ont rendu des services importants à l'éducation. Louis Taillefer est professeur au Département de physique de la Faculté des sciences de l’Université de Sherbrooke depuis 2002.

Feb 6, 2024 | link.aps.org | Mathieu Belanger |Département de Physique |Institut quantique |Université de Sherbrooke

We study a one-band Hubbard model of twisted bilayer cuprates with a twist angle of 53.13∘. By introducing an interlayer bias, we simulate heterobilayers of different dopings. Using the variational cluster approximation, we probe the effect of this bias on the time-reversal symmetry-breaking (TRSB) phase. Doping differences between layers affect the region where TRSB occurs; we construct a phase diagram mapping out the TRSB phase in the n1−n2 plane, with nℓ being the electron density on layer ℓ.