We demonstrate a successful realization of unconditional quantum teleportation in the microwave regime over the distance of 42 cm by exploiting two-mode squeezing and analog feedforward. We generate squeezed and feedforward signals in the GHz regime by using superconducting Josephson parametric amplifiers. We demonstrate a violation of the no-cloning limit for the teleported states, thus, proving the unconditional security of the protocol. Furthermore, our experiments reveal the influence of the feedforward gain and entanglement strength on the fidelity of teleported states in the presence of finite noise and losses. In the end, we discuss perspectives of microwave quantum communication in the cryogenic environment and beyond, which enables future implementations of microwave quantum local area networks and distributed quantum computing with superconducting circuits.

MCQST
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