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hep-ph2025
Redshifting the Cosmological Constant in Unimodular Gravity via Nonlinear Quantum Mechanics
David E. Kaplan, Surjeet Rajendran
The cosmological constant problem represents a profound conflict between quantum field theory and general relativity. Unimodular gravity offers a compelling starting point by de-gr…
hep-ph2025
A Solution to the Hierarchy Problem with Non-Linear Quantum Mechanics
David E. Kaplan, Surjeet Rajendran
We argue that the hierarchy problem of the standard model of particle physics can be solved by adding a state-dependent term to the Higgs sector. We present an example of a scalar…
hep-ph2025
What can solve the Strong CP problem?
David E. Kaplan, Tom Melia, Surjeet Rajendran
Three possible strategies have been advocated to solve the strong CP problem. The first is the axion, a dynamical mechanism that relaxes any initial value of the CP violating angle…