AQUTE Work-Packages

SP1: Entangling gates and quantum processors

WP1.1: Trapped ions for quantum processors
Leader: R. Blatt
WP1.1 objectives are the application of multi-qubit gate operations and the implementation strategies for creating and characterizing entangled states such that we will deliver a scalable ion trap (micro-chip) quantum processor.

WP1.2: Cavity QED for entanglement operations
Leader: D. Meschede
WP1.2 is focused on the generation of non-local cat states in the photon fields of two distant cavities, shining new light on the decoherence processes in macroscopic quantum entanglement and on small atomic qubit registers being entangled by a controlled cavity interaction.

WP1.3: Scalable neutral atom quantum processing
Leader: Ph. Grangier
WP1.3 will deliver quantum gate operations either in optical tweezers or in micro traps. New candidates for qubit carriers, neutral Ytterbium atoms, will be explored to demonstrate extremely long-lived entangled quantum registers.

WP1.4: Few-body quantum control
Leader: K. Mølmer
WP1.4 will investigate scalability towards more than 10 qubits and multiple quantum gate operations. Robust and fast gate operations will be delivered using optimal control theory. The focus is on 3-10 particles entanglement. The state of the art will be significantly improved, in both the number of entangled particles and the fidelity and speed of gate operations.



SP2: Hybrid quantum systems and interconnects

WP2.1: Interconnects between ions and/or atoms
Leader: G. Morigi 
WP2.1 will establish quantum networks, and a specific aim will be to demonstrate entanglement between two nodes and test the robustness of the protocols and the scalability of the networks.

WP2.2: Flying qubits and cavity QED
Leader: G. Rempe
WP2.2 will work on quantum links between two remote and independent cavity QED systems and will include integrated chip based, thus scalable micro-arrays. The expected outcome will be a light atom interface, delivering entanglement and teleportation.

WP2.3: AMO connecting with solid state systems
Leader: T. Hänsch
WP2.3 will explore mechanisms for a controlled coupling of atomic systems to well-isolated solid-state systems. The resulting hybrid quantum systems may allow for quantum information processing or quantum metrology. Here we break scientifically new ground as these hybrid systems have never been explored with such breadth before. Among the expected highlights are techniques for the preparation of non-classical states of nano-mechanical resonators by coupling to atoms.



SP3: Quantum simulators

WP3.1: Optical lattice quantum simulations
Leader: I. Bloch
In WP3.1 classically hard to solve Hamiltonians are identified and experimentally simulated using bosons and fermions in optical lattice experiments. On the theoretical side, we will deliver novel numerical methods to address strongly correlated many-body systems. Fully new is the research on Bose and Fermi gases in frustrating non-Abelian fields, Bose and Fermi polarized and spinor gases in disordered lattices.

WP3.2: Dipolar systems interactions and entanglement
Leader: J-I. Cirac
WP3.2 takes advantage from long range interactions of atoms in Rydberg states to deliver large-scale entanglement in optical lattices. These states are ideally suited for quantum simulation, investigating a rich extended Hubbard toolbox, including models for exotic superfluid pairing, topological order, or frustrated spin systems. This WP complements ideally the objectives in WP3.1, where next-neighbour interactions are dominant.

WP3.3: Alkaline earths
Leader: M. Inguscio
The use of Alkaline earths in WP3.3 delivers a new class of quantum simulators which allows implementing many-body models in which the Hamiltonian parameters can be tailored independently for atoms in different spin states. The experimental efforts are stimulated by recent progress in the development of cold atoms experiments, converting this technology into a versatile quantum simulator.

WP3.4: Quantum state and reservoir engineering
Leader: P. Zoller
Quantum state and reservoir engineering has received very recently increasing interest, for instance for the idea of using dissipation, which typically is destroying entanglement, to perform quantum simulations, even to create quantum states, or to drive quantum phase transitions. This research is complemented with quantum optimal control to drive a many-qubit system as a whole, either for its preparation as a quantum register or for entanglement production. With our work-packages on quantum simulation, we will deliver a unique instrument to answer many open questions in strongly correlated many-body systems. The expected outcome will have significant impact on fields also outside quantum information.



SP4: Quantum Technologies

WP4.1: Chip clocks and entangled ion frequency measurements
Leader: J. Reichel
In WP4.1 we will investigate chip clocks and entangled ion frequency measurements in a concentrated approach of experimental groups which will demonstrate the use of entanglement for improving a measurement of time, obviously among the most important and high-impact applications. We expect spin squeezing of atomic ensembles in micro-chip devices, possibly replacing commonly used Rubidium clocks in future with orders-of-magnitude improved performance.

WP4.2: Quantum-enhanced measurements and sensors
Leader: J. Schmiedmayer
In WP4.2 we address the current limits of interferometry, as we can enhance the sensitivity by a full exploitation of entanglement. A BEC-based spatial atom interferometer will be operated in the Heisenberg limit, employing the technology of atom chips which allows scalability and miniaturization. Quantum limited measurements will also be essential to analyze the complex many body quantum states created in quantum information processing or quantum simulations.

WP4.3: Novel experimental techniques for quantum devices
Leader: S. Haroche
WP4.3 develops new techniques for the manipulation and detection of single atoms or ions, including deterministic sources, which are key enabling technologies. This SP will deliver short term applications, leading to significant advances in the field of quantum devices.



SP5: Management and communication

WP5.1: Financial, contractual and project management
Leader: F. Schmidt-Kaler
This WP (together with WP0.2) aims to act as a “support centre” for the whole project, liaising with the Commission (especially with respect to the managing of financial and legal aspects of the contract), maintaining the Consortium Agreement and IPR related matters, by providing administrative, financial and legal support services to the Consortium, coordinating the technical works of the partners (in order to reach the project objectives within the agreed budget and time scales), and assisting the Coordinators in the reporting to the Commission.

WP5.2: Internal and external communication
Leader: T. Calarco
WP0.2 complements WP0.1 in the task of creating the project “support centre” through ensuring an efficient flow of information between all the project participants (Coordinator, governing and operational bodies, partners), assisting the project operational bodies in implementing decisions from the General Assembly, keeping records of all documents produced by partners for internal and external communication and dissemination, and ensuring the realizations of joint collaborative tasks such as clustering, inter-project collaborations, initiative-level promotion activities and contribution to FET-wide events and publications.