LogiQ

The LogiQ (Logical Qubit) setup is funded by IARPA in a collaboration with other research groups (EQUAL consortium; experiment collaborators: Innsbruck, Mainz, Sydney, theory collaborators: Swansea, Oxford), with the overall aim of realizing a protected 'logical qubit' encoded in the electronic states of approx. 10 ions. This 'logical qubit' would contain enough redundancy to stabilize the quantum information stored in it and have a longer lifetime compared to a single physical qubit.

In order to realize such a 'logical qubit' there are many technical challenges associated with handling about 10 physical qubits that have to be overcome. With our flexible cryogenic setup we are exploring solutions that enable precise handling of strings of ions:

• Individual addressing using a waveguide array.
• Individual detection using a low-latency camera and a dedicated FPGA for analysis
• Flexible trap with two X-junctions and transport capability for handling multiple strings of ions (see picture).
• Long coherence times due to self-shielding superconducting coils that maintain a stable magnetic field
• Ion loading from a 2D-MOT