2016/08/15 by Daeho Yang, Junki Kim, Moonjoo Lee +2 · 1 citation
Computer Science · Physics and Astronomy · #Atomic physics #Coherent states #Dipole #Field (mathematics) #Laser #Mechanical and Optical Resonators #Optical cavity #Phase (matter) #Phase space #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum decoherence #Quantum mechanics #Quantum optics #Quantum optics and atomic interactions #Vacuum state #quant-ph
paper · pdf · doi:10.1103/physreva.94.023826
published as Phys. Rev. A 94, 023826 (2016) · 9 pages, 7 figures
openalex publication_date 2016/08/15 · arxiv created 2016/08/29 · arxiv updated 2016/08/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We propose a method for generating an optical Schr"odinger-cat-like state in a cavity in a substantial decoherence regime. Even when the cavity decay rate is considerably large, a cat-like state can be generated in a laser-like setting if the gain for the field is larger than the loss. Under the condition that opposite-phase atomic dipoles repeatedly traverse the cavity, the cavity field converges to a squeezed vacuum state in a steady state. A Schr"odinger-cat-like state is then generated when a single photon decay occurs. The phase-space distribution of the cat state can be revealed in homodyne detection by using the decaying photon as a herald event. Quantum trajectory simulation was used to identify the conditions for the Schr"odinger-cat-like state formation as well as to analyze the properties of those states. Based on these simulations, possible experiments are proposed within the reach of the current technology.