التفاصيل البيبلوغرافية
| العنوان: |
Not even 6 dB: Gaussian quantum illumination in thermal background. |
| المؤلفون: |
Volkoff, T J1 (AUTHOR) volkoff@lanl.gov |
| المصدر: |
Journal of Physics A: Mathematical & Theoretical. 2/10/2024, Vol. 57 Issue 6, p1-13. 13p. |
| مصطلحات موضوعية: |
*SQUEEZED light, *COHERENT states, *LIGHTING, *TRANSMITTERS (Communication) |
| مستخلص: |
In analyses of target detection with Gaussian state transmitters in a thermal background, the thermal occupation is taken to depend on the target reflectivity in a way which simplifies the analysis of the symmetric quantum hypothesis testing problem. However, this assumption precludes comparison of target detection performance between an arbitrary transmitter and a vacuum state transmitter, i.e. 'detection without illumination', which is relevant in a bright thermal background because a target can be detected by its optical shadow or some other perturbation of the background. Using a target-agnostic thermal environment leads to the result that the oft-claimed 6 dB possible reduction in the quantum Chernoff exponent for a two-mode squeezed vacuum transmitter over a coherent state transmitter in high-occupation thermal background is an unachievable limiting value, only occurring in a limit in which the target detection problem is ill-posed. Further analyzing quantum illumination in a target-agnostic thermal environment shows that a weak single-mode squeezed transmitter performs worse than 'no illumination', which is explained by the noise-increasing property of reflected low-intensity squeezed light. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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