Strontium quantum gas group


CombiLogo UvA NWO ERC QuSoft


Quantum computing and simulation with Rydberg coupled Sr atoms in arrays of optical tweezers


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Quantum computers and simulators can solve problems that are utterly out of reach for traditional computers. We are building a quantum computer/simulator based on an array of strontium atoms held in optical tweezers. Quantum bits are encoded in the internal states of these atoms and quantum calculations are carried out by shining laser beams onto the atoms in a well-orchestrated way. Quantum computers based on neutral atoms profit from the fact that the atoms are naturally identical and that it is quite easy to scale the computer to hundreds of quantum bits. Our quantum computer is based on strontium atoms, an alkaline-earth element that is also commonly used to build some of the best clocks in the world. Exploiting clock technology from our European Quantum Flagship project iqClock and strontium technology from our European Research Council project QuantStro we intend to build a quantum computer that can demonstrate algorithms developed by QuSoft and the QSC. Currently we can trap individual strontium atoms in an array of 49 tweezers (see below) and we are extending our machine with the lasers necessary to implement one- and two-qubit gates. We recently joined forces with the neutral atom quantum computing team at the TU/e and have the ambition of providing a quantum computer connected to the quantum computing cloud platform Quantum Inspire in 2024 within QuantumDelta NL.


The Team

Alex Urech, Ivo Knottnerus, Thies Plassman, Robert Spreeuw, Jiri Minar, Florian Schreck and the TU/e neutral atom quantum computing team.


More information

Quantum simulation and computing with Rydberg qubits


Lab tour with Alex Urech



Pictures from the lab

Fluorescence from Sr in tweezers arrange as a QDNL logo Average fluorescence from individual Sr atoms in 7x7 tweezer array Fluorescence from individual atoms in 4 tweezers

(left) Fluorescence of Sr atoms trapped in optical tweezers arrange as a Quantum Delta NL logo. (middle) Average fluorescence of individual Sr atoms in a 7x7 tweezer array. (right) The result of many experimental runs, each showing the fluorescence of individual Sr atoms randomly trapped in the 7x7 array.


SrMic photo



Former team members

Sergey Pyatchenkov, Oleksiy Onishchenko and Georgios Siviloglou

Georgios Siviloglou thanks the European Comission for a Marie Curie grant (SYMULGAS, No. 661171).


last change: 08.11.2020 by FS