Abstract
Cloud computing provides a way for using remote configurable computing resources for on-demand self-services of multiple consumers [1]. We move a major step towards quantum cloud computing by proposing a novel way for various users to construct on-demand quantum gates using remote quantum resources. Moreover, it provides confidentiality of users’ private operations, i.e., the constructed gates cannon be known by other people because of quantum properties. Our proposed scheme is implemented based on quantum teleportation. Bob provides computing resources of different components such as single qubit gates which are controlled by qubits of control register. Through quantum state teleportation, Alice can configure all qubits of Bob’s control register and construct the required gate using Bob’s components. Figure 1 (left) shows a quantum circuit for remote construction of two-qubit quantum gate. Alice can construct arbitrary two-qubit gate U = α · 𝐴1⨂𝐴2 + 𝛽 · 𝐵1⨂𝐵2 by teleporting her local qubit |𝑞0⟩ with state of α|0⟩ + 𝛽|1⟩ to Bob. Particularly, arbitrary control unitary gate such as CNOT can be constructed when 𝐴1, 𝐴2, 𝐵1, 𝐵2 are carefully selected [2].
© 2015 IEEE
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