Our PINE system is the first quantum computer that fits inside two standardized 19-inch racks. Building on top of the ion-trap quantum computing platform pioneered in Innsbruck, Austria, tens of ion-qubits can be worked with. Here we provide a teaser on the characterisation of operating a stand and 20 qubit quantum register. The characterisation shows out-of-the box performance compatible with fault-tolerant quantum computing.
In our ion-trap quantum computer, we move a laser beam onto the position of an ion or multiple ions. Discrete laser pulses onto the ions change the encoded quantum information. Ideally the laser light would hit only the targeted ion(s) and nothing else. Here we characterize the undesired coupling of the laser lightfield via the coupling strength of non-targeted ions relative to the addressed ion-qubit in a 20-qubit register. Typical numbers are usually in the range of 1-3%. Here, we show average coupling to next-neighbor qubits of about 0.6%. In terms of error rates, this is in the 1e-5 range and compatible with fault-tolerant requirements. Adding additional error mitigation routines allow to suppress this value to the 1e-7 level. Such levels are better than what is currently considered to be necessary for fault-tolerant quantum computing.
These low values show that end-users can execute quantum algorithms on our device without considering error mitigation routines. Seeing that we support a wide range of quantum software development kits such as Qiskit, Cirq, PennyLane, Pytket, … existing code can be readily tested on our devices and without requiring detailed knowledge of the underlying hardware.
To date, our solutions have been used to demonstrate a universal gate-set for logical qubits.
Should you have some particular use-case in mind, please let us know.