RT Journal Article T1 Cluster Monte Carlo algorithm with a conserved order parameter A1 Martín Mayor, Víctor A1 Yllanes, D. AB We propose a cluster simulation algorithm for statistical ensembles with fixed order parameter. We use the tethered ensemble, which features Helmholtz’s effective potential rather than Gibbs’s free energy and in which canonical averages are recovered with arbitrary accuracy. For the D=2,3 Ising model our method’s critical slowing down is comparable to that of canonical cluster algorithms. Yet, we can do more than merely reproduce canonical values. As an example, we obtain a competitive value for the 3D Ising anomalous dimension from the maxima of the effective potential. PB American Physical Society SN 1539-3755 YR 2009 FD 2009-07-02 LK https://hdl.handle.net/20.500.14352/42769 UL https://hdl.handle.net/20.500.14352/42769 LA eng NO © 2009 American Physical Society. We thank L. A. Fernandez for discussions. We were partly supported by MEC Spain through Contract No. FIS2006- 08533. The bulk of our computations were carried out at BIFI. NO Ministerio de Educación y Ciencia (MEC) DS Docta Complutense RD 24 abr 2025