Thank you for viewing!! What is a Quantum Computer? George Johnson / Atsushi Mizutani Optical Quantum Computer Akira Furusawa Due to long-term storage on the bookshelf, the sides and cover have discolored, faded, and have minor scratches due to aging. In addition, there are no writings, noticeable stains, or tears. ↓↓↓↓↓↓ Considering the above points, we would appreciate it if those who understand that this is a used item due to home storage and amateur inspection would purchase it.