■Preface
Assumption of Editor-in-Chief of JPSJ
Seiji Miyashita......125

■Topics
What the Quantum Computational Supremacy Experiment on a Quantum Computer Demonstrated
Keisuke Fujii......128

■Reviews
Magnetism-Driven Negative Thermal Expansion of Inverse-Perovskite Type Antiferromagnets
Masahito Mochizuki......130

Ultrafast and High-Intensity Science Opened by Chirped Pulse Amplification and Optical Phase Control
Yoshiaki Kato and Yoshitaka Mori......139

■Researches
Electronic Properties, Optical Absorption Coefficient, and Defect Properties of Thin-Film Solar Cell Material BaSi₂
Motoharu Imai and Naoto Umezawa......148

Shift Current: Quantum Mechanical Picture of the Bulk Photovoltaic Effect
Naoki Ogawa, Masato Sotome, Masao Nakamura, and Takahiro Morimoto......154

■JPSJ Selected Papers in the Latest Issue......160

■La Toccata......164

■Physics Community News......168

■Reports on JPS Meeting......171

■Book Reviews......177