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| Main Authors: | , |
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| Format: | Preprint |
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2025
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| Online Access: | https://arxiv.org/abs/2503.08248 |
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| _version_ | 1866911674611531776 |
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| author | Gündogan, Mustafa Tasgin, Mehmet Emre |
| author_facet | Gündogan, Mustafa Tasgin, Mehmet Emre |
| contents | Room temperature microwave and low-THz links exhibit large thermal occupations, making phase sensitive signal-idler correlations difficult to recover after loss. We introduce a work-extraction-based quantum-illumination receiver in which the returned mode $\hat{a}_R$ is measured via heterodyne detection and the outcome is fed forward to a locally stored, possibly displaced idler. For a noisy two-mode-squeezed resource, the receiver is characterized by the heterodyne correlation parameter $x_{\rm h}=ηc^2/[a(b+ν_{\rm h})]$. The calibrated displaced-idler work score has Chernoff exponent $ξ_{\rm h}=x_{\rm h}/4+O(x_{\rm h}^2)$, which becomes linear in the target transmissivity $η$ in the weak-return, background-dominated regime, matching the leading-order performance of an ideal OPA receiver, but achieved here via a linear and directly measurable correlation mechanism. Unlike OPA-based schemes, the present protocol does not require zero first moments and does not rely on weak-probability nonlinear detection. In our scheme, extracted work converts hard-to-measure second order moment correlation information into an accessible first moment signal. Moreover, preparation noise $\bar{n}_p$, naturally present at room temperature in the microwave and THz regimes, can be directly harnessed when correlated prior to transmission, whereas a classical coherent signal cannot utilize such incoherent thermal photons without first converting them into usable signal energy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_08248 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum illumination with nonzero-mean signal-idler states via noise-enhanced heterodyne work extraction Gündogan, Mustafa Tasgin, Mehmet Emre Quantum Physics Room temperature microwave and low-THz links exhibit large thermal occupations, making phase sensitive signal-idler correlations difficult to recover after loss. We introduce a work-extraction-based quantum-illumination receiver in which the returned mode $\hat{a}_R$ is measured via heterodyne detection and the outcome is fed forward to a locally stored, possibly displaced idler. For a noisy two-mode-squeezed resource, the receiver is characterized by the heterodyne correlation parameter $x_{\rm h}=ηc^2/[a(b+ν_{\rm h})]$. The calibrated displaced-idler work score has Chernoff exponent $ξ_{\rm h}=x_{\rm h}/4+O(x_{\rm h}^2)$, which becomes linear in the target transmissivity $η$ in the weak-return, background-dominated regime, matching the leading-order performance of an ideal OPA receiver, but achieved here via a linear and directly measurable correlation mechanism. Unlike OPA-based schemes, the present protocol does not require zero first moments and does not rely on weak-probability nonlinear detection. In our scheme, extracted work converts hard-to-measure second order moment correlation information into an accessible first moment signal. Moreover, preparation noise $\bar{n}_p$, naturally present at room temperature in the microwave and THz regimes, can be directly harnessed when correlated prior to transmission, whereas a classical coherent signal cannot utilize such incoherent thermal photons without first converting them into usable signal energy. |
| title | Quantum illumination with nonzero-mean signal-idler states via noise-enhanced heterodyne work extraction |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2503.08248 |