Speaker
Description
Loss-tolerant quantum codes (LTCs) are particular error-correcting codes, essential for safeguarding quantum information against physical qubit losses, with significant applications in quantum communication, as well as in quantum computation, where photons can connect various modules of a computer, facilitate remote computation, or even act as the fundamental units of all-photonic processors.
In this work, we enhance the feasibility and performance of loss correction in two main directions: optimizing the code generation protocol and refining the specific details of the code.
Specifically, we develop novel protocols for the generation of photonic LTCs. These protocols move an important step forward with respect to the existing literature by allowing for a hierarchical generation of the LTCs - a feature that, although recognized to be highly desirable, had remained elusive in previous proposals; in line with expectations, our numerical analyses show that our hierarchically generated LTCs feature remarkably improved loss-tolerance properties. In addition, our scheme is deterministic and only requires one single quantum emitter; this provides important simplifications to the system layout, and is grounded on recent experimental achievements.
Furthermore, we address the design of the LTCs themselves. Unlike current approaches, we demonstrate that introducing asymmetries in the LTCs can systematically enhance success rates while simultaneously reducing the required photon number.
Together, these results go in the direction of improving the performance (i.e., the loss-tolerance), by simplifying the physical resources
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