Probing vacuum field fluctuations and source radiation separately in space and time

Lindel, Frieder; Herter, Alexa Marina; Faist, Jérôme; Buhmann, Stefan Yoshi

doi:10.1103/physrevresearch.5.043207

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2024

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Cited by 3 publications

References 56 publications

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Entanglement harvesting from electromagnetic quantum fields

Lindel,

Herter,

Gebhart

et al. 2024

Phys. Rev. A

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Entanglement harvesting from electromagnetic quantum fields

Lindel,

Herter,

Gebhart

et al. 2024

Phys. Rev. A

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Optical Time-Domain Quantum State Tomography on a Subcycle Scale

Hubenschmid,

Guedes,

Burkard

2024

Phys. Rev. X

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Following recent progress in the experimental application of electro-optic sampling to the detection of the quantum fluctuations of the electromagnetic-field ground state and ultrabroadband squeezed states on a subcycle scale, we propose an approach to elevate broadband electro-optic sampling from a spectroscopic method to a full quantum tomography scheme, able to reconstruct a free-space quantum state directly in the time domain. By combining two recently developed methods to theoretically describe quantum electro-optic sampling, we analytically relate the photon-count probability distribution of the electro-optic signal to a transformed phase-space quasiprobability distribution of the sampled quantum state as a function of the time delay between the sampled midinfrared pulsed state and an ultrabroadband near-infrared probe pulse. We catalog and analyze sources of noise and show that in quantum electro-optic sampling with an ultrabroadband probe pulse one can expect to observe thermalization due to entanglement breaking. Mitigation of the thermalization noise enables a tomographic reconstruction of broadband quantum states while granting access to its dynamics on a subcycle scale. Published by the American Physical Society 2024

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