Dynamics of magnetization at infinite temperature in a Heisenberg spin chain. (https://pubmed.ncbi.nlm.nih.gov/38574139/)

These scientists wanted to understand how tiny particles called qubits behave in a special chain. They were trying to figure out if the qubits follow a specific set of rules when they spin around. They used a chain made up of 46 superconducting qubits to do their experiment.

To study this, the scientists looked at how the magnetization, which is like a tiny magnet, moves across the chain's center. They used a special formula to measure this movement. They found that the first two parts of the formula showed that the magnetization moved in a very interesting way, kind of like how a fire spreads quickly. This was a clue that the qubits might follow certain rules called the KPZ rules.

But when they looked at the third and fourth parts of the formula, they saw that the rules they thought the qubits were following might not be completely correct. This means they need to think about other ideas to explain how the qubits behave. By studying these different parts of the formula, the scientists learned more about how qubits move and how they can be used in different ways.

So, in simple terms, these scientists were studying how tiny particles spin around in a chain to see if they follow certain rules. They found some clues that matched the rules they were looking for, but also discovered that there might be other rules at play that they need to explore further.

Rosenberg E., Andersen TI., Samajdar R., Petukhov A., Hoke JC., Abanin D., Bengtsson A., Drozdov IK., Erickson C., Klimov PV., Mi X., Morvan A., Neeley M., Neill C., Acharya R., Allen R., Anderson K., Ansmann M., Arute F., Arya K., Asfaw A., Atalaya J., Bardin JC., Bilmes A., Bortoli G., Bourassa A., Bovaird J., Brill L., Broughton M., Buckley BB., Buell DA., Burger T., Burkett B., Bushnell N., Campero J., Chang HS., Chen Z., Chiaro B., Chik D., Cogan J., Collins R., Conner P., Courtney W., Crook AL., Curtin B., Debroy DM., Barba ADT., Demura S., Di Paolo A., Dunsworth A., Earle C., Faoro L., Farhi E., Fatemi R., Ferreira VS., Burgos LF., Forati E., Fowler AG., Foxen B., Garcia G., Genois E., Giang W., Gidney C., Gilboa D., Giustina M., Gosula R., Dau AG., Gross JA., Habegger S., Hamilton MC., Hansen M., Harrigan MP., Harrington SD., Heu P., Hill G., Hoffmann MR., Hong S., Huang T., Huff A., Huggins WJ., Ioffe LB., Isakov SV., Iveland J., Jeffrey E., Jiang Z., Jones C., Juhas P., Kafri D., Khattar T., Khezri M., Kieferova M., Kim S., Kitaev A., Klots AR., Korotkov AN., Kostritsa F., Kreikebaum JM., Landhuis D., Laptev P., Lau KM., Laws L., Lee J., Lee KW., Lensky YD., Lester BJ., Lill AT., Liu W., Locharla A., Mandra S., Martin O., Martin S., McClean JR., McEwen M., Meeks S., Miao KC., Mieszala A., Montazeri S., Movassagh R., Mruczkiewicz W., Nersisyan A., Newman M., Ng JH., Nguyen A., Nguyen M., Niu MY., O'Brien TE., Omonije S., Opremcak A., Potter R., Pryadko LP., Quintana C., Rhodes DM., Rocque C., Rubin NC., Saei N., Sank D., Sankaragomathi K., Satzinger KJ., Schurkus HF., Schuster C., Shearn MJ., Shorter A., Shutty N., Shvarts V., Sivak V., Skruzny J., Smith WC., Somma RD., Sterling G., Strain D., Szalay M., Thor D., Torres A., Vidal G., Villalonga B., Heidweiller CV., White T., Woo BWK., Xing C., Yao ZJ., Yeh P., Yoo J., Young G., Zalcman A., Zhang Y., Zhu N., Zobrist N., Neven H., Babbush R., Bacon D., Boixo S., Hilton J., Lucero E., Megrant A., Kelly J., Chen Y., Smelyanskiy V., Khemani V., Gopalakrishnan S., Prosen T., Roushan P. Dynamics of magnetization at infinite temperature in a Heisenberg spin chain. Science. 2024 Apr 5;384(6691):48-53. doi: 10.1126/science.adi7877. Epub 2024 Apr 4.