Breakthrough in Ion-Trap Quantum Computing and Simulation
TapTechNews May 30th news, the research group of Lu-Ming Duan from Tsinghua University / Hefei National Laboratory has recently achieved the stable confinement of a 512-ion two-dimensional array and the coherent quantum manipulation and quantum simulation of 300-ion qubits.
This work realizes the largest scalable multi-ion quantum simulation with single-point resolution in the world, which is an important step in the large-scale research of ion-trap quantum computing and simulation. The research paper of this achievement was published online in the international academic journal Nature on May 29th.
It is introduced that the ion-trap system is considered one of the physical systems with the greatest potential to achieve large-scale quantum simulation and quantum computing. In this work, the researchers used low-temperature integrated ion-trap technology and a two-dimensional ion array scheme to expand the number of ion qubits and improve the stability of the ion array. For the first time, they achieved the stable confinement and sideband cooling of 512 ions, and for the first time, they achieved single-point resolvable quantum state measurement for 300 ions.
The researchers then used 300 ion qubits to realize the quantum simulation of a tunable-coupled long-range transverse-field Ising model. On the one hand, the researchers prepared the ground state of the frustrated Ising model through quasi-adiabatic evolution, measured the quantum bit space correlation, thereby obtaining the information of the collective vibration mode of the ions in the direction perpendicular to the plane, and compared and verified with the theoretical results. On the other hand, the researchers conducted quantum simulation of the dynamics evolution of this model and performed quantum sampling of the final state, and verified through coarse-grained analysis that it gives a nontrivial probability distribution, exceeding the direct simulation ability of classical computers.
TapTechNews attached the paper link:
https://doi.org/10.1038/s41586-024-07459-0