Seminar on current topics in quantum thermodynamics
Dr. Akira Sone
Location
Online
Seminar on current topics in quantum thermodynamics – Online Event
Date & Time
January 7, 2022, 2:30 pm – 4:00 pm
Description
Title: Toward Practical Near-term Quantum Computers
Dr. Akira Sone, Aliro Quantum Technologies
Abstract:
Recent development in quantum information has led to breakthroughs in quantum technologies, which has brought us
to a new Information Age. Noisy Intermediate-Scale Quantum (NISQ) computers with number of quantum bits (qubits)
ranging from fifty to a few hundreds and the limited size of quantum circuits are expected to be available in near future.
Particularly, variational quantum algorithms (VQAs) based on the quantum-classical optimization loop are recently
considered as a leading strategy for the realization of NISQ computers. However, there are still key open problems in the
theoretical and practical aspects of NISQ computers. These include the practical system identification, rigorous analysis
on the reliability, and the envisaged interdisciplinary applications of NISQ computers. In this colloquium, I will introduce
my past research and summarize my research plans regarding NISQ computers. First, I will discuss a practical scenario of
indirect system identification of NISQ computers through the measurement on a single quantum probe coupled to the
system [1,2]. Then, I will discuss the reliability of VQAs by showing how the measurement locality and the circuit depth
relate to the trainability of VQAs on NISQ computers [3,4]. Finally, I will introduce the application of NISQ computers for
the quantum sensing by demonstrating the preparation of the optimal quantum sensors assisted by VQAs [5,6,7]. These
research on quantum sensing and NISQ computers can open an exciting future research direction to realize precision
sensing by utilizing the near-term quantum computers, which can be applied in broader fields such as chemistry,
material science and biology.
References
[1] Akira Sone and Paola Cappellaro, Phys. Rev. A 95, 022335 (2017)
[2] Akira Sone and Paola Cappellaro, Phys. Rev. A 96, 062334 (2017)
[3] M. Cerezo, Akira Sone, Tyler Volkoff, Lukasz Cincio and Patrick J. Coles, Nat. Commun. 12, 1791 (2021)
[4] Samson Wang, Enrico Fontana, M. Cerezo, Kunal Sharma, Akira Sone, Lukasz Cincio and Patrick J. Coles,
Nat. Commun. 12, 6961 (2021)
[5] M. Cerezo, Akira Sone, Jacob L. Beckey, and Patrick J. Coles, Quantum Sci. Technol. 6, 035008 (2021)
[6] Akira Sone, M. Cerezo, Jacob L. Beckey, and Patrick J. Coles, Phys. Rev. A 104, 062602 (2021)
[7] Jacob L. Beckey, M. Cerezo, Akira Sone, Patrick J. Coles, arXiv: 2010.10488 (2020)