منابع مشابه
Quantum Mechanics with Trajectories: Quantum Trajectories and Adaptive Grids
Although the foundations of the hydrodynamical formulation of quantum mechanics were laid over 50 years ago, it has only been within the past few years that viable computational implementations have been developed. One approach to solving the hydrodynamic equations uses quantum trajectories as the computational tool. The trajectory equations of motion are described and methods for implementatio...
متن کاملIrreversibility with quantum trajectories.
Irreversibility is an important issue for many quantum processes. Loschmidt echoes, originally introduced as a way to gauge sensitivity to perturbations in quantum mechanics, have turned out to be a useful tool for its investigation. Following the philosophy supporting this idea, and using quantum trajectories as defined in the causal interpretation of quantum mechanics due to Bohm, we introduc...
متن کاملPurification of quantum trajectories
A key concept in the modern theory of open quantum systems is the notion of indirect measurement as introduced by Kraus [Kra]. An indirect measurement on a quantum system is a (direct) measurement of some quantity in its environment, made after some interaction with the system has taken place. When we make such a measurement, our description of the quantum system changes in two ways: we account...
متن کاملDecoherence and quantum trajectories
Decoherence is the process by which quantum systems interact and become correlated with their external environments; quantum trajectories are a powerful technique by which decohering systems can be resolved into stochastic evolutions, conditioned on different possible “measurements” of the environment. By calling on recently-developed tools from quantum information theory, we can analyze simpli...
متن کاملQuantum Trajectories and Quantum Measurement Theory
Beyond their use as numerical tools, quantum trajectories can be ascribed a degree of reality in terms of quantum measurement theory. In fact, they arise naturally from considering continuous observation of a damped quantum system. A particularly useful form of quantum trajectories is as linear (but non-unitary) stochastic Schrödinger equations. In the limit where a strong local oscillator is u...
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ژورنال
عنوان ژورنال: Physics Letters A
سال: 2012
ISSN: 0375-9601
DOI: 10.1016/j.physleta.2012.10.030