  A quantum version of data centers might be significant in the quantum era. In
this paper, we introduce Quantum Data Center (QDC), a quantum version of
existing classical data centers, with a specific emphasis on combining Quantum
Random Access Memory (QRAM) and quantum networks. We argue that QDC will
provide significant benefits to customers in terms of efficiency, security, and
precision, and will be helpful for quantum computing, communication, and
sensing. We investigate potential scientific and business opportunities along
this novel research direction through hardware realization and possible
specific applications. We show the possible impacts of QDCs in business and
science, especially the machine learning and big data industries.
