RT Journal Article T1 1/f noise in the two-body random ensemble A1 Relaño Pérez, Armando A1 Molina, R. A. A1 Retamosa Granado, Joaquín AB We show that the spectral fluctuations of the two-body random ensemble exhibit 1/f noise. This result supports a recent conjecture stating that chaotic quantum systems are characterized by 1/f noise in their energy level fluctuations. After suitable individual averaging, we also study the distribution of the exponent alpha in the 1/f(alpha) noise for the individual members of the ensemble. Almost all the exponents lie inside a narrow interval around alpha=1, suggesting that also individual members exhibit 1/f noise, provided they are individually unfolded. PB American Physical Society SN 1539-3755 YR 2004 FD 2004-07 LK https://hdl.handle.net/20.500.14352/51290 UL https://hdl.handle.net/20.500.14352/51290 LA eng NO ©2004 The American Physical Society DS Docta Complutense RD 14 jun 2025