Abstract. Quantum beats, the fact that periodic oscillations arise from coherent superposition of frequency-distinguishable states, have enabled various quantum information technologies beyond the possibilities of classical physics. Although the conventional quantum beats are based on unitary optical elements, we present that nonunitary material provides an alternative degree-of-freedom to control the quantum interference and even enables the observation of anomalous quantum beating signals. An elaborate lossy film is used to explore its tunability over the effective photon–photon interaction in frequency modes, which may introduce sophisticated nonunitary realization into integrated optical platforms. In addition, we confirm its ability of harnessing the suppression and enhancement of single- and two-photon absorption by manipulating the symmetric property of frequency entanglement, and this would provide significant benefits in entanglement-assisted absorption spectroscopy. These results show an alternative method to investigate the quantum light–matter interaction, facilitating the use of two-photon interference for quantum light-based spectroscopy and microscopy.
Resonance fluorescence, the process in which a single two-level quantum emitter interacts with a near-resonant coherent light, is a cornerstone of quantum optics as a paradigmatic light-matter interaction. Quantum phenomena in resonance fluorescence have been accounted for in terms of one- and two-photon processes; how...
Quantum coherences are the primary signatures of nonadiabatic dynamics in biological complexes, yet their unambiguous detection remains a challenge. Conventional time-resolved spectroscopies rely on temporal beating patterns that are inherently convoluted with population-relaxation dynamics and instrumental artifacts,...
Deependra Jadoun, V. M. Freixas, Sankaran Ramesh et al.· Journal of the American Chem...· 0 citations
Continuous weak measurements of quantum systems are of great relevance in quantum foundations and applications. They can be achieved by probing the quantum system of interest by repeatedly measuring an auxiliary system weakly coupled to it. Here we study two qubits coupled in different points to a common one-dimensiona...
Debmalya Das, Giuseppe Magnifico, Maria Maffei· 0 citations
Quantum interferometry provides a pivotal method for investigating complex photon-photon interaction, enabling various quantum information technologies that beyond the possibilities of classical physics. While such an effective interaction is mostly studied in N × N unitary transformation, m × n nonunitary transformati...
The realization of high-quality and stable entangled states is crucial for the advancement of quantum information science and technology. The entangled photons generated from a warm atomic ensemble exhibit high spectral purity and indistinguishability, offering significant potential for atom–photon-based quantum networ...
Youngwoong Choi, Jinhyuk Bae, H. Moon· Quantum Science and Technolo...· 0 citations
We propose a Bell-measurement node for quantum repeaters based on a planar semiconductor microcavity operating in the strong-coupling regime. Cavity photons hybridize with quantum-well excitons to form polaritons combining properties of photons and matter quasiparticles. A control photon loaded into one polariton mode...
Jun-Hui Cao, Alexey Kavokin· 0 citations
We use cookies to run the site and, with your consent, for analytics and to show ads.
See our Cookie Policy.
