Project description DEENESFRITPL A scalable continuous-variable measurement-based approach to quantum computation Measurement-based quantum computation was introduced a little more than two decades ago. It relies on the processing of quantum information via iterations of simple measurements on multiple qubits prepared in a highly entangled state, a so-called cluster state. Despite significant progress over the last decade, considerable conceptual and technical challenges remain a barrier to up-scaled versions which can outperform classical computers. The ERC-funded ClusterQ project will build on its demonstrated extremely large 2D cluster states to deliver scalable 3D cluster states. These will be explored and tested to develop a continuous variable measurement-based approach, a novel strategy for fault-tolerant measurement-based quantum computation using surface codes in 3D cluster states. Show the project objective Hide the project objective Objective Measurement-based quantum computation is a highly promising approach to quantum computing as it simply performs quantum processing directly through the measurements of a multi-partite entangled cluster state and thereby circumvents the complex unitary dynamics of conventional gate-based quantum computers. However, despite significant progress over the last decade in devising new strategies for measurement-based quantum computing, significant conceptual and technical challenges still remain for realizing up-scaled versions that reach the quantum advantage regime where it outperforms classical computation. In ClusterQ we aim to overcome these challenges using continuous variable three-dimensional entangled cluster states. Based on our recent work on generating and exploiting extremely large two-dimensional clusters states we aim to make conceptual breakthroughs along three different directions. First, we deterministically generate highly scalable three-dimensional cluster states of different topological structures, and explore their many-body behaviour and usefulness for quantum computing. Next, we use the three-dimensional cluster states combined with hybrid detection technologies to demonstrate new quantum boson sampling algorithms – a near-term quantum computing algorithm allowing for a demonstration of quantum computational supremacy – and finally, we explore, theoretically and experimentally, a novel strategy for fault-tolerant measurement-based quantum computation using surface-codes in 3D cluster states. ClusterQ aims to position the continuous variable measurement-based approach to quantum information processing in the field of front-running candidates for NISQ (noisy, intermediate-scale quantum) computing and, in the longer term, fault-tolerant quantum computing. Fields of science engineering and technologyelectrical engineering, electronic engineering, information engineeringelectronic engineeringcomputer hardwarequantum computersnatural sciencesphysical sciencesquantum physicsquantum opticsnatural sciencescomputer and information sciencesdata sciencedata processing Keywords Continuous variable optical quantum information Cluster states and Multi-partite entangled states Measurement-based quantum computing Programme(s) HORIZON.1.1 - European Research Council (ERC) Main Programme Topic(s) ERC-2021-ADG - ERC ADVANCED GRANTS Call for proposal ERC-2021-ADG See other projects for this call Funding Scheme ERC - Support for frontier research (ERC) Coordinator DANMARKS TEKNISKE UNIVERSITET Net EU contribution € 2 792 416,00 Address Anker engelunds vej 101 2800 Kongens lyngby Denmark See on map Region Danmark Hovedstaden Københavns omegn Activity type Higher or Secondary Education Establishments Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Other funding € 0,00
