The March meeting of the American Physical Society (APS) was held in Las Vegas, Nevada, U.S.A. from March 5 to 10 (March 20 to 22 for the virtual meeting), and five Quemix members attended and conducted seven presentations.
<Presentations by Quemix>.
A summary of each presentation is as follows：
(1) Summary of Presentations (2) Reactions by audience
1. Skyrmions in van der Waals centrosymmetric materials (Tran Ba Hung)
(1) Using first-principles calculations and Monte Carlo simulations, we have observed not only conventional but also antiferromagnetic skyrmion melons in van der Waals
(2) Some researchers were so interested in our methodology that they are willing to keep contacts with us for future collaborations.
2. Quantum Error Mitigation via Quantum-Noise-Effect Circuit Groups (Yusuke Hama)
(1) We presented the construction and effectiveness of a quantum error reduction method using a group of noise effect quantum circuits, a group of quantum circuits that represent quantum noise effects, the source of quantum computation errors.
(2) The presentation was overall well received by audience, without being expressed any doubts and even more received compliments from some researchers such as "Great Talk.
3. Improving the success probability of imaginary-time evolution on a quantum computer (Nishi Hirofumi)
(1) We proposed a quantum circuit that increases the probability of success by combining the quantum amplitude amplification method with the stochastic imaginary-time evolution method, which was proposed as a ground-state calculation method for quantum chemical calculations.
(2) In answer to 3 questions asked by researchers, detailed explanations were provided for each, which enabled the audience to deepen the understanding of the content of the presentation.
4. Imaginary-time evolution with a single ancilla: first-quantized eigen solver for electronic structure calculation in quantum chemistry (Yusuke Nishiya)
(1) He presented the fundamentals of a series of methods, including a method for constructing quantum circuits of stochastic imaginary-time evolution and an introduction to the First quantum eigen solver based on this method.
(2) Following to a question about the problem of exponential decay of the total success probability, the presenter provided one of the solutions to use quantum amplitude amplification, which satisfied the inquiry.
5. Geometric optimization based on first-quantized Hamiltonian using imaginary-time evolution on a quantum computer (Yuichiro Matsushita)
(1) We presented exhaustive structural optimization using stochastic imaginary-time evolution methods. In particular, the presenter introduced that by treating nuclei classically, the computation can be performed efficiently with a small number of qubits.
(2) In answer to a question about the relationship between the computation system and the number of qubits required for the computation, the presenter provided the explanation as detailed as possible.
6. Origin of spin reorientation in Nd2Fe14B permanent magnet (Yuichiro Matsushita)
(1) We reported a deadline for spin reorientation in Nd2Fe14B permanent magnets, which we attributed to the Dzyaloshinskii-Moriya interaction.
(2) The presentation led to possible future collaborations with other institutions, exchanging business cards, etc.
7. Multiscale simulations toward magnetic loss and magnetic recording (Tran Ba Hung)
(1) A new multiscale simulation scheme was proposed, and the presentation was made about details of its greatly improved accuracy with respect to magnetic losses and magnetic recording.
(2) Many researchers who visited our stand and looked at the poster were impressed by the accuracy of our methods. We exchanged contact information to pursue the possibility of future collaboration.
Throughout the entire event, we were able to hold active Q&A sessions with researchers from various countries, together with discussions on specific ideas going beyond business card exchange, which enabled to build a network with experimental researchers. As a result, we realized being at the frontline in quantum research which attracts a great deal of interest of the people.
<General impression＞
Among the many sessions set up at APS, quantum-related topics were incessantly presented by some researchers. Here are some of our general impressions on this year's conference.
⬥ The semiconductor qubit attracted a large audience for its related presentations. In our opinion, their interests are increasing both in the field of experimentation and in that of theory regarding what methods will be used to create hardware in the future.
⬥ There seemed to be a growing interest in quantum algorithms for EARLY FTQC, which is positioned between NISQ and FTQC.
⬥ We realized the necessity of significant computational resources and highly accurate simulations as for the growing interest in discovering new high-performance materials based on machine learning.
There were a great number of booths ran by several companies, and the conference was not only an exciting event for academia, but also for business.
<At the APS-March Meeting＞
