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- Title
Quantum trajectories for environment in superposition of coherent states.
- Authors
Dąbrowska, Anita Magdalena
- Abstract
We derive stochastic master equations for a quantum system interacting with a Bose field prepared in a superposition of continuous-mode coherent states. To determine a conditional evolution of the quantum system, we use a collision model with an environment given as an infinite chain of not interacting between themselves qubits prepared initially in an entangled state being a discrete analogue of a superposition of coherent states of the Bose field. The elements of the environment chain interact with the quantum system in turn one by one, and they are subsequently measured. We determine a conditional evolution of the quantum system for continuous in time observations of the output field as a limit of discrete recurrence equations. We consider the stochastic master equations for a counting as well as for a diffusive stochastic process.
- Subjects
QUANTUM trajectories; MARKOV spectrum; COHERENT states; CONTINUOUS time systems; STOCHASTIC processes; QUANTUM theory
- Publication
Quantum Information Processing, 2019, Vol 18, Issue 7, pN.PAG
- ISSN
1570-0755
- Publication type
Article
- DOI
10.1007/s11128-019-2340-4