Graphene-based single-photon detector for quantum information science and astrophysics скачать в хорошем качестве

Graphene-based single-photon detector for quantum information science and astrophysics

Kin Chung Fong - Raytheon BBN Technologies Graphene-based single-photon detector for quantum information science and astrophysics High sensitivity photon detectors are essential in qubit measurement and remote entanglement, as well as dark matter detection and observing the cosmic infrared background in astrophysics. However, sensing in microwave and far-infrared spectrum is challenging because of the low photon energy. In this talk, we will present how to leverage the giant thermal response of graphene electrons for photon detection. Interestingly, when our graphene bolometer achieves a record-high sensitivity of 10-19 W/Hz1/2, this sensitivity is limited, no longer by extrinsic factors but, by the statistical thermal fluctuation intrinsic to the graphene electrons as a canonical ensemble at 0.2 K [1]. Using the graphene-based Josephson junction, we demonstrate the single-photon detection in the infrared regime by observing the photon shot noise [2]. As an outlook, we will discuss how the unique properties of two-dimensional materials will open new opportunities in quantum information science. [1] Nature 586, 42 (2020) [2] arXiv:2011.02624.