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arXiv · 2512.17046

Attosecond Control of Squeezed Light

Russell Zimmerman·Shashank Kumar·Shiva Kant Tiwari·Md Ehsanuzzaman·Eric Liu·Francis Walz·Siddhant Pandey·George J. Economou II·Hadiseh Alaeian·Chen-Ting Liao·Valentin Walther·Niranjan Shivaram
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Abstract

Squeezed light is a key resource in quantum metrology and quantum information science. It is primarily generated through nonlinear optical interactions, where the degree of squeezing is set by the nonlinearity of the medium. Here, we modulate the third-order nonlinear response of a dielectric with strong ultrafast laser fields to control squeezed light generation on attosecond time scales. By tuning a sub-cycle phase delay between the input femtosecond pulses, we switch the generated light between amplitude-squeezed and phase-squeezed states. We measure the quantum noise using a frequency-resolved balanced homodyne detection scheme that extracts field quadratures in many frequency modes simultaneously. From these measurements we obtain the complete coherency matrix containing quadrature correlations across the frequency modes of the pulse. These results enable quantum light sources with sub-cycle control of squeezing and open a route to transduction of dynamical quantum correlations in matter to quantum correlations in electric fields.

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Russell Zimmerman, Shashank Kumar, Shiva Kant Tiwari, Md Ehsanuzzaman, Eric Liu, Francis Walz, Siddhant Pandey, George J. Economou II, Hadiseh Alaeian, Chen-Ting Liao, Valentin Walther, Niranjan Shivaram. 2025-12-18. Attosecond Control of Squeezed Light. https://arxiv.org/abs/2512.17046

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