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Geprint op :
10 december 2018



Title (code)

Solid state quantum information processing (QIP)

Executive organisational unit


Programme management

Prof.dr.ir. L.P. Kouwenhoven



Cost estimate

M€ 9,7

Concise programme description

To develop experimental and theoretical techniques for the controlled creation and detection of multi-particle entanglement in solid state systems with the long-term goal of building quantum information and computation systems.

Background, relevance and implementation
Now, for the first time, technology allows the engineering of complex quantum mechanical systems and the study of their fundamental behaviour. In contrast to classically coupled quantum devices, such as in transistor circuits, this new quantum engineering treats the entire complex system as a phase-coherent quantum system with non-classical multi-particle corre­lations. It is unknown how large and to what degree of complexity such a quantum system can be realised since large-scale quantum systems are extremely fragile due to decoherence.
The emerging fields of quantum information and computation provide a new and instructive way of thinking about extended quantum systems. For instance, uncorrelated particles can become entangled by the time-evolution of specific interactions. Proposed is to use this framework for designing extended quantum systems and study the behaviour of entangled multi-particle states. On a longer timescale is aimed at building coupled photonic and elec­tronic systems suitable for transporting quantum information prepared by logic operations. Quantum logic takes place in qubit circuits. World-wide various two-level systems are being considered as physical realisations of qubits for a quantum computer. These include NMR in bulk liquids, cold ions (electromagnetic traps) or cold atoms (optical lattices). Realisations in the solid state are challenging on the short term but provide the greatest technological promise on the long term, since large-scale integration is possible with existing chip technology.
This programme is mainly restricted on quantum information processing to solid state systems, for two reasons: (i) it forms the most likely realisation of hardware; (ii) the strongest activities in experimental quantum information processing within the Netherlands concern solid state systems (electrons in Delft and photons in Leiden).
A 'focus group' was found to be the appropriate programme format. A focus group will strongly accelerate the proposed research towards world-wide outstanding results. At the moment the focus group contains 4 permanent staff positions.
The challenges defined by this focus group have a pay-off time far in the future for industrial labs, but perfectly fit academic research policy. It will force students and young researchers to be creative at a deep conceptual level in order to obtain progress on a practical, and in‑house testable opto-electronic circuit.
The investment requirements for this activity are largely covered by a different proposal (e.g. clean room facilities have been proposed in NanoNed).

The first tranche of this programme had a closed character and was aimed at establishing the 'focus group'. In 2008 there has been a mid-term evaluation together with an open call for proposals for all groups which are in a position to give a relevant contribution to meet the objectives of the programme. The Delft University of Technology (TUD) and Leiden University (LEI) are committed to offer a permanent positions to respective three and one of the four FOM research scientists should they happen to remain at the TUD or LEI at the end of the programme. Aside from the FOM finances, Vidi/Vici funds will also be used for the execution of the programme. The final evaluation of this programme will consist of a self-evaluation initiated by the programme leader and is foreseen for 2014.

Please find a research highlight that was achieved in 2014 within this FOM programme here.

Please find a research highlight that was achieved in 2013 within this FOM programme here.