8 papers
Observation of universal non-Gaussian statistics of the order parameter across a continuous phase transition
Maxime Allemand, Géraud Dupuy, Géraud Dupuy +8
Second-order phase transitions are characterised by critical scaling and universality. The singular behaviour of thermodynamic quantities at the transition, in particular, is deter…
From Bose glass to many-body localization in a one-dimensional disordered Bose gas
Vincent Grison, Nicolas Dupuis
We determine the finite-temperature phase diagram of a one-dimensional disordered Bose gas using bosonization and the nonperturbative functional renormalization group (RG). We disc…
Universal Crossover in the Three-Channel Charge Kondo Model at High Transparency
Nicolas Paris, Nicolas Dupuis, Christophe Mora
Quantum impurity models provide a central framework for correlated electron physics, with quantum dots enabling controlled experimental realizations. While their weak-coupling beha…
Strong-coupling RPA theory of a Bose gas near the superfluid--Mott-insulator transition: universal thermodynamics and two-body contact
Nicolas Dupuis, Moksh Bhateja, Adam Rançon
We present a strong-coupling expansion of the Bose-Hubbard model based on a mean-field treatment of the hopping term, while onsite fluctuations are taken into account exactly. This…
Two-body contact of a Bose gas near the superfluid--Mott-insulator transition
Moksh Bhateja, Nicolas Dupuis, Adam Rançon
The two-body contact is a fundamental quantity of a dilute Bose gas that relates the thermodynamics to the short-distance two-body correlations. For a Bose gas in an optical lattic…
Resilience of the quantum critical line in the Schmid transition
Nicolas Paris, Luca Giacomelli, Romain Daviet +3
Schmid predicted that a single Josephson junction coupled to a resistive environment undergoes a quantum phase transition to an insulating phase when the shunt resistance excee…