■Preface
Academic Journals Reeling out by Annoying Numbers
Hisatomo Harima ...... 429

■The Century of Quantum Mechanics
Miracle in Physics: 100th Anniversary of Quantum Mechanics
Seiji Miyashita ...... 432

Entropies in Quantum Mechanics
Takahiro Sagawa ...... 433

Quantum Information Viewpoint in Quantum Field Theory
Tadashi Takayanagi ...... 437

Progress of Experimental Cosmology Using Superconducting Sensors
Masaya Hasegawa ...... 441

Direct Atomic-Level Measurements of Quantum Phenomena on Solid Surfaces
Hiroshi Imada ...... 445

Topological Quantum Condensed Matter Physics
Shinsei Ryu ...... 448

Electrons in Solids and Quantum Phase Transition
Kentaro Kitagawa ...... 453

■Researches
Nuculear Matter from the Viewpoint of Polarons
Hiroyuki Tajima ...... 458

Muonium-Antimuonium Transition, to Explore the Generation Structure of Leptons
Yuichi Uesaka ...... 463

■One Hundred and Fifty Years of the Physical Society of Japan......469

■JPSJ Selected Papers in the Latest Issue......470

■PTEP Selected Papers in the Latest Issue......474

■Reports on JPS Meeting......476

■Book Reviews......483

■Letters and Comments......484