Yes, even if an object is not in a coherent state, it can still undergo quantum tunneling under certain conditions. Quantum tunneling is a quantum mechanical phenomenon where a particle can pass through a potential energy barrier that would be classically insurmountable.
Coherent states are special states in quantum mechanics that exhibit unique properties, such as minimal uncertainty and specific phase relationships. While coherent states can enhance certain quantum effects, they are not a requirement for quantum tunneling to occur.
Quantum tunneling is a consequence of the wave-like nature of particles described by quantum mechanics. According to the principles of quantum mechanics, particles can exist in a superposition of states and exhibit wave-like behavior. When a particle encounters a potential energy barrier that is lower than its total energy, there is a finite probability that the particle can tunnel through the barrier and appear on the other side.
The probability of tunneling depends on various factors, including the height and width of the barrier, the mass of the particle, and the energy of the particle. As long as these conditions are met, quantum tunneling can occur regardless of whether the particle or object is in a coherent state.
It's important to note that the concept of coherence in quantum mechanics refers to the well-defined phase relationship between different quantum states. Coherence is not a prerequisite for tunneling to take place, although it can influence the probability or efficiency of tunneling in some cases.