Related papers: QuGrav: Bringing gravitational waves to light with Qumodes

QuGrav: Bringing gravitational waves to light with Qumodes

URL: http://arxiv.org/abs/2506.09459v1
Date: Wed, 11 Jun 2025 07:06:08 GMT
Title: QuGrav: Bringing gravitational waves to light with Qumodes
Authors: Dmitri E. Kharzeev, Azadeh Maleknejad, Saba Shalamberidze,
Abstract summary: We propose using qumodes, quantum bosonic modes, for detecting high-frequency gravitational waves via the inverse Gertsenshtein effect.<n>For an occupation number $n$ of the photon field in a qumode, the conversion probability is enhanced by a factor of $n+1$ due to Bose-Einstein statistics.<n>Our results indicate that, at microwave frequencies and with existing technology, the proposed setup can attain sensitivities within 1.7 orders of magnitude of the cosmological bound.
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License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: We propose using qumodes, quantum bosonic modes, for detecting high-frequency gravitational waves via the inverse Gertsenshtein effect, where a gravitational wave resonantly converts into a single photon in a magnetized cavity. For an occupation number $n$ of the photon field in a qumode, the conversion probability is enhanced by a factor of $n+1$ due to Bose-Einstein statistics. Unlocking this increased sensitivity entails the ability to continuously prepare the qumode and perform non-demolition measurement on the qumode-qubit system within the qumode coherence time. Our results indicate that, at microwave frequencies and with existing technology, the proposed setup can attain sensitivities within 1.7 orders of magnitude of the cosmological bound. With anticipated near-future improvements, it has the potential to surpass this limit and pave the way for the first exploration of high-frequency cosmological gravitational wave backgrounds. At optical frequencies, it can enhance the sensitivity of current detectors by one order of magnitude. That further enhances their potential in reaching the single-graviton level.

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