Bohmian mechanics is not relativistic and has not been coherently formulated for spin-1/2 or spin 1 fields.
The Copenhagen interpretation is the best (most accurate) interpretation of quantum mechanics, so long as it is understood as a purely “epistemic” interpretation. That is: unlike pre-quantum theories, quantum mechanics does not provide a complete ontology of the world. There are physical properties (the observables) that can take various values, and the theory gives conditional probabilities for these possibilities, but no picture of what happens in between.
Consistent histories, applied to cosmology, is a slight adaptation of Copenhagen, in which one can obtain a probability for an entire history of the universe (specified in terms of observables-taking-values), given a “wavefunction of the universe” and a set of “mutually decoherent histories”. However, it is still not ontologically complete, as it is still up to the user to decide when and where in each history, observables shall take values. The only constraint is mutual decoherence, i.e. not violating the uncertainty principle. One might look for a set of maximally specified decoherent histories, as a determining ontological principle, but there’s still a very large number of ways to do this.
Bohmian mechanics is not relativistic and has not been coherently formulated for spin-1/2 or spin 1 fields.
The Copenhagen interpretation is the best (most accurate) interpretation of quantum mechanics, so long as it is understood as a purely “epistemic” interpretation. That is: unlike pre-quantum theories, quantum mechanics does not provide a complete ontology of the world. There are physical properties (the observables) that can take various values, and the theory gives conditional probabilities for these possibilities, but no picture of what happens in between.
Consistent histories, applied to cosmology, is a slight adaptation of Copenhagen, in which one can obtain a probability for an entire history of the universe (specified in terms of observables-taking-values), given a “wavefunction of the universe” and a set of “mutually decoherent histories”. However, it is still not ontologically complete, as it is still up to the user to decide when and where in each history, observables shall take values. The only constraint is mutual decoherence, i.e. not violating the uncertainty principle. One might look for a set of maximally specified decoherent histories, as a determining ontological principle, but there’s still a very large number of ways to do this.