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most citedBright Coherent Ultrahigh Harmonics in the keV X-Ray Regime from Mid-Infrared Femtosecond Lasers

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quant-ph2026

Vibrationally Induced Resonances in Lasing

Kai Müller, Kimmo Luoma, Christian Schäfer

Optical circuits and light sources, such as lasers, undergo continuous miniaturization. In its extreme, nanolasers might be comprised of only a few molecules confined in plasmonic…

quant-ph2026

High-dimensional quantum communication with scalable photonic entanglement in time and frequency

Kai-Chi Chang, Murat Can Sarihan, Nicky Kai Hong Li +13

High-dimensional photonic entanglement holds significant promise for advancing quantum communication, computation, and metrology. For example, large-alphabet quantum communication…

quant-ph2026

Generation of squeezed optical states via stored classical pulses in a Bose gas

Sevilay Sevinçli, Dennis Rätzel, Markus Krutzik +2

We propose and analyze a scheme to generate squeezed light by storing a classical probe pulse in a Bose--Einstein condensate (BEC) and exploiting the nonlinear evolution caused by…

quant-ph2025

Detecting quantum many-body states with imperfect measuring devices

K. Uriostegui, C. Pineda, C. Chryssomalakos +2

We study a coarse-graining map arising from incomplete and imperfect addressing of particles in a multipartite quantum system. In its simplest form, corresponding to a two-qubit st…

quant-ph2025

Passive quantum state transfer in a dispersion-engineered waveguide

Zeyu Kuang, Oliver Diekmann, Lorenz Fischer +2

High-fidelity state transfer is fundamentally limited by time-reversal symmetry: one qubit emits a photon with a certain temporal pulse shape, whereas a second qubit requires the t…

quant-ph2025

Certified Private Relational Time from Entanglement

Karl Svozil

We introduce an ``entangled clock'' in which time is defined operationally by discrete measurement registrations on a singlet state. Locally, each party's tick rate is fixed by the…