arXiv:2611.09653v1 Announce Type: cross Abstract: This paper proposes a phase-balanced differential Rydberg atomic quantum receiver (DRAQR) for weak-signal recovery, using local-oscillator phase control to reinforce differential signal responses and a shared squeezed-reservoir model to correlate inter-cell quantum projection noise (QPN) and photon shot noise (PSN). An analytical model incorporating QPN, PSN, intrinsic thermal noise (ITN), and inter-cell correlations quantifies signal-to-noise ratio (SNR) gain, outage-constrained minimum detectable power, and bit-error rate (BER) for square $M$-QAM. For the evaluated settings, SNR gain reaches approximately $10$~dB as PSN correlation approaches unity, with BER decreasing as correlation increases. Under Rician fading, at a $0$-dB threshold SNR and maximum outage probability of $0.1$, the minimum detectable power decreases from $-146.95$~dBm at $K=1.155$ to $-159.98$~dBm at $K=2.4$. Analytical results are validated against Monte-Carlo simulations over $150{,}000$ data runs per point for receiver-performance plots.