Networks powered by quantum entanglement: from the first loophole-free Bell test to a quantum Internet

30 01/2017

Monday, 30 Jan. 2017, 17:30 - 18:30

Presenter: Ronald Hanson; QuTech and Kavli Institute of Nanoscience, Delft University of Technology
Host: CoQuS
Where: Lise Meitner Hörsaal, Strudlhofgasse 4, 1st floor, Vienna

Entanglement – the property that particles can share a single quantum state - is arguably the most counterintuitive yet potentially most powerful element of quantum physics. Future quantum networks may harness the unique features of entanglement in a range of exciting applications, such as quantum computation and simulation, secure communication, enhanced metrology for astronomy and time-keeping as well as fundamental tests of nature. To fulfil these promises, a strong worldwide effort is ongoing to gain precise control over multi-particle nodes and to wire them up using quantum-photonic channels. Diamond spins associated with NV centers are promising building blocks for such a network as they combine a coherent electron-optical interface [1] (similar to that of trapped atomic qubits) with a local register of robust and well-controlled nuclear spin qubits [2]. Here I will introduce the field of quantum networks and present an overview of the latest progress, including the first loophole-free violation of Bell’s inequalities [3,4] and the first primitive network experiments on a pair on spatially separated two-qubit nodes.

 

Monday, 30 January 2017, 16:30h get-together with coffee and snacks!

The seminar talk will be preceded by a CoQuS Student talk at 17:00h by

Philippe Allard Guerin, University of Vienna

Exponential communication complexity advantage from quantum superposition of causal orders

 

Hosted by: Philip Walther