RSS icon
Twitter icon
Facebook icon
Vimeo icon
YouTube icon

Frustration induced quantum phases with Rydberg blockaded interactions

April 30, 2015 - 11:00am
Speaker: 
Guido Pupillo
Institution: 
University of Strasbourg
We discuss the emergence of novel quantum phases in simple bosonic extended Hubbard models where particles interact via soft-shoulder potentials. In one dimension, we demonstrate that the low energy phase can be a conformal cluster Luttinger liquid where the microscopic degrees of freedom correspond to mesoscopic ensembles of particles [1]. This phase has qualitatively new features with respect to the conventional Tomonaga-Luttinger liquid [2]. In two dimensions, we provide a microscopic path for the realization of an exotic superglass phase, where superfluidity coexists with structural disorder. Remarkably, such a phase occurs in the absence of any externally imposed frustration, e.g., in the lattice geometry or in the interactions [3]. Given the simplicity and generality of the models, these phases may be relevant for experiments with Rydberg-dressed atoms confined to optical lattices. 
 
[1] Cluster Luttinger Liquids of Rydberg dressed atoms in optical lattices, M. Mattioli, M. Dalmonte, W. Lechner, and G. Pupillo, Phys. Rev. Lett. 111, 165302 (2013)
 
[2] Cluster Luttinger liquids and emergent supersymmetric conformal critical points in the one-dimensional soft-shoulder Hubbard model, M. Dalmonte, W. Lechner, Z. Cai, M. Mattioli, A. M. Lauchli, and G. Pupillo, arXiv:1502.00396 
 
[1] Superglass phase of Rydberg atoms, A. Angelone, F. Mezzacapo, and G. Pupillo, arXiv:1504.00346
2115 Computer and Space Sciences
College Park, MD 20742

Subscribe to A Quantum Bit 

Quantum physics began with revolutionary discoveries in the early twentieth century and continues to be central in today’s physics research. Learn about quantum physics, bit by bit. From definitions to the latest research, this is your portal. Subscribe to receive regular emails from the quantum world. Previous Issues...

Sign Up Now

Sign up to receive A Quantum Bit in your email!

 Have an idea for A Quantum Bit? Submit your suggestions to jqi-comm@umd.edu