Magnetic Molecules as Building Blocks for Quantum Technologies

ince the initial observation of quantum effects, scientists have worked
diligently to understand and harness their potential. Thanks to many pioneers,
a level where quantum effects can be exploited is reached. Numerous cutting-
edge technologies, such as quantum sensing and quantum computing, are
proposed. A common trait in all technologies is the need to manipulate and read
out their states; therefore, the quantum characteristics of the building blocks
must adhere to strict guidelines. Magnetic Molecules (MMs) are promising
candidates. They can be obtained indistinguishably, and the control over their
structural and electronic properties, makes them appealing to act as quantum
bits or “qubits”. MMs can be connected to other units while preserving their
coherence properties, enabling the implementation of quantum gates. Further-
more, the low-lying energy levels can be exploited as qudits, which can exist in
more than 2 states simultaneously (d > 2), allowing them to hold more informa-
tion efficiently. The larger electronic/nuclear space in qudits can decrease the
number of physical units and enhance computational efficiency, reducing error
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and making them promise for complex problem-solving. In this perspective
article, the physical characteristics of MMs and key achievements that position
them as promising candidates for quantum technologies, are described.