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Author(s): Mikhail Tokman, Jitendra K. Verma, Jacob Bohreer, and Alexey Belyanin We develop a general nonperturbative formalism and propose a specific scheme for maximally efficient generation of biphoton states by parametric decay of single photons. We show that the well-known critical coupling concept of integrated optics can be generalized to the nonlinear coupling of quantiz… [Phys. Rev. Lett. 131, 233802] Published Thu Dec 07, 2023

Author(s): Anahita Khodadad Kashi, Lucia Caspani, and Michael Kues The Hong-Ou-Mandel (HOM) effect is crucial for quantum information processing, and its visibility determines the system’s quantum-classical characteristics. In an experimental and theoretical study of the spectral HOM effect between a thermal field and a heralded single-photon state, we demonstrate … [Phys. Rev. Lett. 131, 233601] Published Mon Dec 04, 2023

Author(s): Hao Hong, Chen Huang, Chenjun Ma, Jiajie Qi, Xuping Shi, Can Liu, Shiwei Wu, Zhipei Sun, Enge Wang, and Kaihui Liu Optical phase matching involves establishing a proper phase relationship between the fundamental excitation and generated waves to enable efficient optical parametric processes. It is typically achieved through birefringence or periodic polarization. Here, we report that the interlayer twist angle i… [Phys. Rev. Lett...

Author(s): Karol Gietka, Christoph Hotter, and Helmut Ritsch Squeezing is essential to many quantum technologies and our understanding of quantum physics. Here, we show a novel type of steady-state squeezing that can be generated in the closed and open quantum Rabi as well as Dicke model. To this end, we eliminate the spin dynamics which effectively leads to … [Phys. Rev. Lett. 131, 223604] Published Fri Dec 01, 2023

Author(s): Kathrin Kromer, Chunhai Lyu, Menno Door, Pavel Filianin, Zoltán Harman, Jost Herkenhoff, Paul Indelicato, Christoph H. Keitel, Daniel Lange, Yuri N. Novikov, Christoph Schweiger, Sergey Eliseev, and Klaus Blaum Highly charged ions (HCIs) offer many opportunities for next-generation clock research due to the vast landscape of available electronic transitions in different charge states. The development of extreme ultraviolet frequency...

Author(s): Elena Poli, Thomas Bland, Samuel J. M. White, Manfred J. Mark, Francesca Ferlaino, Silvia Trabucco, and Massimo Mannarelli Glitches, spin-up events in neutron stars, are of prime interest, as they reveal properties of nuclear matter at subnuclear densities. We numerically investigate the glitch mechanism due to vortex unpinning using analogies between neutron stars and dipolar supersolids. We explore the vortex and crys… [Phys. Rev...

Author(s): Jose D. H. Rivero, Courtney Fleming, Bingkun Qi, Liang Feng, and Li Ge We present an approach to achieve zero modes in lattice models that do not rely on any symmetry or topology of the bulk, which are robust against disorder in the bulk of any type and strength. Such symmetry-free zero modes (SFZMs) are formed by attaching a single site or small cluster with zero mode… [Phys. Rev. Lett. 131, 223801] Published Wed Nov 29, 2023