The Cosmological Constant Is Physics’ Most Embarrassing Problem

The Cosmological Constant Is Physics’ Most Embarrassing Problem

The enormous discrepancy between the predicted amount of vacuum energy and the measured amount is often called the cosmological constant problem. One of the most prominent—and, by some, most hated—solutions to the cosmological constant problem is called the anthropic principle. Because string theory requires a multiverse, string theorists tend to regard the cosmological constant problem as essentially solved by this reasoning. “We had a model 10 years ago called the Fab Four that was aimed at solving the cosmological constant problem,” Padilla says. Perhaps these efforts to understand the cosmological constant problem will reveal deeper truths about quantum physics and general relativity.

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