"Macroscopic'' quantum superpositions: Atom-field entangled and steady states by two-photon processes
Abbreviated Journal Title
Phys. Rev. A
JAYNES-CUMMINGS MODEL; SCHRODINGER-CAT STATES; 2-PHOTON MICROMASER; GENERATION; COLLAPSE; REVIVAL; APPARATUS; EXAMPLE; CAVITY; VECTOR; Optics; Physics, Atomic, Molecular & Chemical
The dynamics of an exact two-photon Hamiltonian is used to study the time evolution of an initially disentangled pure state of the atom-field system as it goes through cycles of entanglement separated by instances of disentanglement. For specific initial states of the electromagnetic field, the output state is a pure quantum superposition of a squeezed vacuum state and an orthogonal, odd-photon-number state. The odd-photon-number state, which is not a squeezed state, exhibits both nonclassical sub-Poissonian and classical super-Poissonian photon statistics. In the latter case the quantum superposition resembles a macroscopic superposition state. Conditions are obtained on the atom-cavity interaction time for such states to represent the steady states in the injection in a high-Q cavity of a monoenergetic, low-density beam of three-level atoms in a coherent state.
Physical Review A
""Macroscopic'' quantum superpositions: Atom-field entangled and steady states by two-photon processes" (2002). Faculty Bibliography 2000s. 3041.