2002/10/31 by Andrew Silberfarb, Ivan H. Deutsch, Ivan Deutsch · 1 citation
Computer Science · Physics and Astronomy · #Atom (system on chip) #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Faraday effect #Field (mathematics) #Laser #Magnetic field #Measure (data warehouse) #Optics #Physics #Pulse (music) #Quantum Information and Cryptography #Quantum mechanics #Quantum optics and atomic interactions #Traveling wave #quant-ph
paper · pdf · doi:10.1103/physreva.68.013817
published as Phys. Rev. A (68) 13817 (2003) · 9 pages, 2 figures, Update to clarify some points, and change small errors
openalex publication_date 2003/07/25 · arxiv created 2003/08/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider the use of a traveling-wave probe to continuously measure the quantum state of an atom in free space. Unlike the more familiar cavity QED geometry, the traveling wave is intrinsically a multimode problem. Using an appropriate modal decomposition, we determine the effective measurement strength for different atom-field interactions and different initial states of the field. These include the interaction of a coherent-state pulse with an atom, the interaction of a Fock-state pulse with an atom, and the use of Faraday rotation of a polarized laser probe to perform a quantum nondemolition measurement on an atomic spin.