No, you might be correct. They might be calling it that, as in a "quantum of currency". Quantum can mean 'a unit of', but in a more fancier way in the field of technology.

For example, when observing the performance of processes in an operating system as a whole; we measure a specific task within a process in relation to a time quantum, since every processor and operating system is designed differently.

I can see this system being called the Quantum Financial System because it'll run on multiple platforms but it is guaranteed to transfer a unit of currency within a time quantum.

Or QFS does use quantum computers, which I highly doubt since quantum computers have yet to be error-free with the current CRC techniques and algorithms we have. There is no room for error in a realtime financial system. Also, there are functional quantum computers in the private and public sectors but they are not yet powerful enough to do something of that scale. Hypothetically, they should be able to in the future when systems may have many more qubits, more developed quantum logic gates, more stability, and higher error detection and correction.