Daniel Barredo

Abstract Doping an antiferromagnetic (AFM) Mott insulator is central to our understanding of a variety of phenomena in strongly correlated electrons, including high-temperature superconductors1,2. To describe the competition between tunnelling t of hole dopants and AFM spin interactions J, theoretical and numerical studies often focus on the paradigmatic t–J model3 and the direct analogue quantum simulation of this model in the relevant regime of high-particle density has long been sought4,5.

Abstract The standard quantum limit bounds the precision of measurements that can be achieved by ensembles of uncorrelated particles. Fundamentally, this limit arises from the non-commuting nature of quantum mechanics, leading to the presence of fluctuations often referred to as quantum projection noise. Quantum metrology relies on the use of non-classical states of many-body systems to enhance the precision of measurements beyond the standard quantum limit1,2.

6. Results The COVID-19 virus pandemic transformed various aspects of society, including digital consumption habits [1,2,3]. To check to what extent those habits were transformed in Monterrey, the research took a sample of 1552 participants, of whom 46.2% were women and 53.8% were men.