QUROPE Quantum Information Processing and Communication in Europe

• Quantum Information Processing
• Silicon, III-V, Superconductor
• Charge and spin qubits
• mK measurement
• Nanofabrication
• Ultrafast optical measurement
• Quantum cryptography

• Electron spin resonance (ESR)
• electrically detected magnetic resonance (EDMR)
• spin-dependent electronic transport
• ferromagnetic semiconductors (growth and characterisation)

• Quantum information
• Test of Bell inequalities
• Magneto-optical trapping
• Laser development
• Environmental sensing

• Computing: quantum algorithms and complexity, distributed quantum computing
• Communication: quantum games, quantum communication complexity, non-locality
• Security: quantum cryptography, quantum attacks of classical protocols

The quantum physics of superconducting circuits will be applied in new ways to realize circuits where the single charge quantum plays the dual role of the flux quantum in classical Josephson junction circuits. Building on the recent advances in superconducting quantum bit circuits, we will theoretically model, design, fabricate and measure a specific set of circuits which probe the little-explored regime of equally strong Josephson and charging energies, yet well isolated from dissipation so as to achieve strong quantum behaviour of the phase or charge.

QUEVADIS aims to study quantum computation and information processing in a model where information processing is achieved by dissipation or decoherence. The starting point of the proposal is a recent result showing that if system-environment interaction is engineered in a certain very specific way, then universal quantum computation can be achieved simply by letting the system decohere.

QUANTIP aims to develop the tools, components and concepts that will enable progress towards large-scale, integrated quantum photonic circuits for the development of advanced quantum systems for the purposes of quantum communications, information processing and metrology. A range of discrete integrated quantum photonic components will be developed and then integrated to form proof-of-principle demonstrators of fully- integrated prototypes, where all major components are integrated onto a single chip.

PICC aims to identify tools for controlling ion crystal as their size is scaled up, develop strategies for implementing quantum dynamics of mesoscopic ion Coulomb crystals in a noisy environment and explore the capability of ion Coulomb crystals as quantum simulators. The targeted breakthrough is a ten fold increase in the number of entangled ions available for quantum operation operations. The long-term vision underlying this proposal is to engineer quantum correlations and entanglement in ion Coulomb crystals in order to exploit them for technological purposes of different kinds.

MOLSPINQIP intends to prove the validity of molecular spin clusters as building blocks for scalable quantum information architectures, focussing on the engineering of new molecules and on the design of suitable computational schemes.