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Quantum State Reduction by Matter-Phase-Related Measurements in Optical Lattices.

ABSTRACT: A many-body atomic system coupled to quantized light is subject to weak measurement. Instead of coupling light to the on-site density, we consider the quantum backaction due to the measurement of matter-phase-related variables such as global phase coherence. We show how this unconventional approach opens up new opportunities to affect system evolution. We demonstrate how this can lead to a new class of final states different from those possible with dissipative state preparation or conventional projective measurements. These states are characterised by a combination of Hamiltonian and measurement properties thus extending the measurement postulate for the case of strong competition with the system's own evolution.

SUBMITTER: Kozlowski W

PROVIDER: S-EPMC5320499 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature

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Quantum State Reduction by Matter-Phase-Related Measurements in Optical Lattices.

Kozlowski Wojciech W Caballero-Benitez Santiago F SF Mekhov Igor B IB

Scientific reports 20170222

A many-body atomic system coupled to quantized light is subject to weak measurement. Instead of coupling light to the on-site density, we consider the quantum backaction due to the measurement of matter-phase-related variables such as global phase coherence. We show how this unconventional approach opens up new opportunities to affect system evolution. We demonstrate how this can lead to a new class of final states different from those possible with dissipative state preparation or conventional ...[more]

PMID: 28225012

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