Experimental verification of modified theory on synthesis of optical coherence functions

Daniel F. Walls, Gerard J Milburn

Evelyn Tang, Matthew P. A. Fisher, Patrick A. Lee

We calculate the electron spectral function for a spin liquid with a spinon Fermi surface and a Dirac spin liquid. Calculations are based upon the slave-rotor mean-field theory. We consider the effect of gauge fluctuations using a simple model and find the behavior is not strongly modified. The results, distinct from conventional Mott insulator or band theory predictions, suggest that measuring the spectral function, e.g., via ARPES could help in the experimental verification and characterization of spin liquids.

Hans Dang, Sebastian Luff, Martin Fischer +4 more

The canonical commutation relation is a cornerstone of quantum theory and underlies the Heisenberg uncertainty principle. Although uncertainty relations have been extensively tested, direct verifications of the underlying commutation relation itself have remained elusive. We report an experimental demonstration of the bosonic commutation relation for optical field operators based on measurements of two distinct intensity correlation functions. From these measurements, we extract the expectation value of the field-operator commutator for both a single-photon state and coherent state. In both cases, the measured values are consistent with unity, in quantitative agreement with quantum theory.

Dimitris G. Angelakis, Ming-Xia Huo, Darrick E. Chang +2 more

One of the most well known relativistic field theory models is the Thirring model. Its realization can demonstrate the famous prediction for the renormalization of mass due to interactions. However, experimental verification of the latter requires complex accelerator experiments whereas analytical solutions of the model can be extremely cumbersome to obtain. In this work, following Feynman's original proposal, we propose an alternative quantum system as a simulator of the Thirring model dynamics. Here, the relativistic particles are mimicked, counterintuitively, by polarized photons in a quantum nonlinear medium. We show that the entire set of regimes of the Thirring model--bosonic or fermionic, and massless or massive--can be faithfully reproduced using coherent light trapping techniques. The correlation functions of the model can be extracted by simple probing of the coherence functions of the output light using standard optical techniques.

Olga Korotkova, Greg Gbur

Imrana Ashraf Zahid, Vasudevan Lakshminarayanan