Chronological feed of everything captured from Jason Alicea.
This paper investigates the behavior of three-dimensional electron gases under strong magnetic fields, exploring how interactions and symmetry breaking can lead to various emergent phases. The focus is on the competition between charge density waves and superconductivity under different perturbations, ultimately revealing conditions for unconventional superconductivity and non-Fermi liquid states in these extreme environments.
This paper details interferometric sensing protocols leveraging quantum critical wavefunctions, comparing their performance against GHZ and spin-squeezed states. It introduces a symmetry-based algorithm for optimal measurement strategies in both magnetic and Rydberg atom systems. The research investigates the resilience of quantum criticality in sensing applications under various non-ideal conditions, demonstrating potential advantages over traditional methods and even some performance enhancements due to non-unitary deformations.
This work introduces a protocol for extracting defect physics from standard projective measurement snapshots already collected in quantum simulator experiments, bypassing the need to explicitly engineer defects in hardware. Using bulk snapshots alone — demonstrated on a 1D Rydberg atom realization of quantum Ising criticality — the protocol recovers both the defect entropy and the continuous line of fixed points of defect conformal field theory (dCFT). This reuse of existing datasets for multiple defect types has direct implications for experimental efficiency, and the connection to weak-measurement-altered criticality situates the protocol within an active frontier of measurement-induced phase transitions.
This paper proposes a practical experimental scheme to demonstrate measurement-altered criticality in Rydberg atom chains, specifically at Ising and tricritical Ising phase transitions. The method involves projectively measuring a periodic subset of atoms, which is shown to distinctly alter quantum critical correlations. Despite relying on post-selection, the scheme is viable due to surprisingly high probabilities (O(10%) for O(100) sites) of obtaining the dramatic measurement outcomes, and requires minimal additional experimental overhead compared to characterizing unmeasured critical states.