For 12/15:
Article Source: Time Crystal in a Quantum Computer https://www.sciencedaily.com/releases/2021/11/211130130231.htm
Article Summary: In an ongoing effort to create quantum computers, scientists observe a new, non-equilibrium phase of matter as a “time crystal”. Time crystals endlessly repeat their structure in time without any additional energy input or leakage. They are made out of particles that follow that Ising model and are given the appropriate starting energy to spin between each state endlessly. By using Google Sycamore’s quantum computer, the research team was able to simulate the same crystals they found and prove their theoretical infinite stability.
Journal Source: Time-Crystalline Eigenstate Order on a Quantum Processor https://www.nature.com/articles/s41586-021-04257-w
Journal Study:
Vedika Khemani, Shivaji Sondhi and many other researchers found how quantum systems with complex bodies could still change phase outside of equilibrium. This happens through eigenstate order. The researchers made this discovery using superconducted qubits in the Google quantum computer and analyzing data from custom Python code.
Comparisons:
- The article does not hesitate to explain what Ising models are, while the article assumes that reader is already familiar with them.
- Both the journal and the article convey how the time-crystal being in a non-equilibrium phase was novel.
- The article explained why using the quantum computer was useful and even had quotes from some Google employees that helped develop it, however, the journal’s only credits many Google employees in the journal and does not talk specifically about their computer in the paper. These credits are likely why the list of authors is very long.
