The effect of dissipation on confinement is studied for compact QED. This model is relevant to the recently developed gauge theory of high-Tc superconductors. The global phase diagram of the gauge field is clarified in the parameter space of the coupling constant g, the strength of dissipation {γ}, and the temperature T. Confinement is drastically suppressed by dissipation, and the deconfining phase appears even in the strong-coupling and zero temperature limit when {γ} exceeds a critical value. This result supports the spin-charge separation in the resonating-valence-bond state.
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Naoto Nagaosa (1993) studied this question.
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