  The main purpose of this article is to evaluate possible applications of
quantum computers in foreign exchange reserves management. The capabilities of
quantum computers are demonstrated by means of risk measurement using the
quantum Monte Carlo method and portfolio optimization using a linear equations
system solver (the Harrow-Hassidim-Lloyd algorithm) and quadratic unconstrained
binary optimization (the quantum approximate optimization algorithm). All
demonstrations are carried out on the cloud-based IBM Quantum(TM) platform.
Despite the fact that real-world applications are impossible under the current
state of development of quantum computers, it is proven that in principle it
will be possible to apply such computers in FX reserves management in the
future. In addition, the article serves as an introduction to quantum computing
for the staff of central banks and financial market supervisory authorities.
