Title: Chunking quantum networks
Time：28th November 2018，9:00am
Location：725 Conference Room, Communication Building
As quantum technologies develop, we acquire control of an ever-growing number of quantum systems. Unfortunately, current tools to certify non-classical properties of quantum states, such as entanglement and nonlocality, are just practical for systems of a very modest size, of around 4 sites. Our approach to solve this “many-body quantum information problem” consists in devising linear witnesses which admit an exact tensor network state representation. The resulting method, connector theory, allows us to certify entanglement, Bell nonlocality and supra-quantum Bell nonlocality in networks with hundreds of sites in a matter of seconds.