Theory of entanglement and measurement in high-order harmonic generation

Stammer, Philipp

doi:10.1103/PhysRevA.106.L050402

Theory of entanglement and measurement in high-order harmonic generation

Philipp Stammer
(
- ICFO, Barcelona
)

Mar 8, 2022

9 pages

Published in:

Phys.Rev.A 106 (2022) 5, L050402

Published: Nov 30, 2022

e-Print:

2203.04354 [quant-ph]

DOI:

10.1103/PhysRevA.106.L050402 (publication)

View in:

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Abstract: (APS)

Quantum information science and intense laser-matter interaction are two apparently unrelated fields. Here, we introduce the notion of quantum information theory to intense laser-driven processes by providing the quantum mechanical description of measurement protocols for high-order harmonic generation in atoms. This allows one to conceive new protocols for quantum state engineering of light. We explicitly evaluate conditioning experiments on individual optical field modes and provide the corresponding quantum operation for coherent states. The associated positive-operator-valued measures are obtained and give rise to the quantum theory of measurement for the generation of high-dimensional entangled states and coherent-state superposition with controllable nonclassical features on the attosecond timescale. This establishes the use of intense laser-driven processes as an alternative platform for quantum information processing.

Note:

9 pages

entanglement
measurement theory
information theory: quantum
optics: quantum
matter: interaction
coherent state

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