Microwave quantum teleportation over a thermal noise channel*

In the rapidly growing field of quantum networks, quantum teleportation stands out as a promising protocol to realize efficient and unconditionally secure transfer of quantum states. Quantum teleportation of propagating microwave states has been successfully demonstrated in recent experiments [1] and paves the way towards implementation of quantum microwave networks. For realistic use cases, it is of paramount importance to study resilience of microwave quantum teleportation against environmental imperfections. In this regard, we investigate the thermal noise influence in the feedforward channel on the fidelity of teleported states. Furthermore, we analyze the effect of imperfections in the entangled resource states and derive conditions for successful quantum teleportation. We experimentally verify our predictions by employing quantum microwave teleportation over a 6.5m long cryogenic link, which can be operated in a wide temperature range.