Researchers at the Kastler Brossel Laboratory in France have successfully created a quantum debit card that can store unforgeable quantum money, a concept based on the no-cloning theorem. This theorem asserts that identical copies of quantum information cannot be made, making forgery impossible. The team integrated memory devices into their setup, allowing users to load quantum money similarly to a debit card. The quantum debit card utilizes photons exchanged with a quantum device acting as the bank. Although the current storage time for quantum memory is approximately 6 millionths of a second, researchers aim to extend this duration significantly. Enhancements in storage time could facilitate the use of quantum money in metropolitan quantum networks and improve secure long-distance quantum communication.