Unified quantum jump superoperator for optical fields from the weak- to the strong-coupling limit

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.063804· OSTI ID:21439538

Haeyrynen, Teppo; Oksanen, Jani; Tulkki, Jukka ^[1]

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1. Department of Biomedical Engineering and Computational Science, Aalto University School of Science and Technology, Post Office Box 12200, FI-00076 AALTO (Finland)

We derive a generalized quantum jump superoperator that can be used in the quantum trajectory description of single photon detectors, light-emitting diodes (LEDs), and lasers. Our model describes an optical single-mode cavity field coupled to a reservoir through a two-state quantum system and includes three physical parameters: the coupling of the field to the two-state system, the coupling of the two-state system to the reservoir, and the cavity loss rate. In this setup, the two-state system can act as a photodetector or as an energy-adding mechanism. In the first case, we assume that the reservoir acts as a damping mechanism for an ideal cavity and derive reduced field operators describing the photon detection events. Our model coincides with the commonly known quantum trajectory based photon counting models at the weak- and strong-coupling limits and is, furthermore, also applicable between their validity regimes. In the second case, we assume that the reservoir injects energy into a lossy cavity through the two-state system. Again we derive the reduced field operators describing photon creation events into the lossy cavity. We show that this setup can act as an LED or as a laser depending on the strength of the injection. We also investigate how the setup operates at the close proximity of the lasing threshold.

• OSTI ID: 21439538
• Journal Information: Physical Review. A, Vol. 81, Issue 6; Other Information: DOI: 10.1103/PhysRevA.81.063804; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
COUPLING
DAMPING
FIELD OPERATORS
LASER RADIATION
PHOTONS
QUANTUM MECHANICS
RADIATION DETECTION
TRAJECTORIES
VISIBLE RADIATION
BOSONS
DETECTION
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
MASSLESS PARTICLES
MATHEMATICAL OPERATORS
MECHANICS
QUANTUM OPERATORS
RADIATIONS