Berlin 2024 – scientific programme
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QI: Fachverband Quanteninformation
QI 12: Poster I
QI 12.8: Poster
Tuesday, March 19, 2024, 11:00–14:30, Poster B
Noise-protected quantum state transfer between distant nodes in a quantum network — •Syeda Aliya Batool1,2,3 and Peter Rabl1,2,3 — 1Technical University of Munich, TUM School of Natural Sciences, Physics Department, 85748 Garching, Germany — 2Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — 3Munich Center for Quantum Science and Technology (MCQST), 80799 Munich, Germany
We propose and analyze the implementation of a noise-resilient qubit-photon interface for advancing long-distance quantum communication. The considered network consists of two unidirectionally coupled quantum nodes, where each node comprises of qubit coupled to an optical cavity. The transmission protocol is implemented by generating time-symmetric pulses on both nodes under ideal conditions. In this way, the state of the qubit coupled to the input node is mapped onto the time-symmetric photon wave packet that propagates through the channel and can then be absorbed by the qubit coupled to the output node. To address the detrimental effect of low-frequency noise on this protocol, we employ a continuous dynamical decoupling process by strongly driving the qubit with an external dressing field. This technique implements a continuous spins-echo effect, while still permitting a faithful mapping of the qubit state onto a propagating photonic qubit. This research contributes valuable insights into the development of noise-protected qubit-photon interfaces. The results provide the path for robust quantum communication protocols, establishing a foundation for secure quantum information transfer across extended distances.
Keywords: noise-resilient; quantum communication; continuous dynamical decoupling; time-symmetric; qubit-photon