Papers

Yuwen Yin, Ruimin Chen, Shibing Ji +7 more·Jun 23, 2026

We report the enhanced sensitivity of the Rydberg microwave (MW) receiver by exploiting the Doppler effect in a vapor cell. A two-photon Rydberg ladder scheme is implemented via the co-propagation of probe and coupling lasers, which enhances the Dopp...

Hua-Li Chen, Hsien-Yi Hsieh, Chien-Ming Wu +2 more·Jun 23, 2026

We report on an experiment in which two independent squeezed vacuum states get entangled by mixing them with a balanced beam splitter. We follow standard practice and use an inseparability criterion to quantify their entanglement. However, this only ...

Afraa Mahboubi, Büşra Gökçe Zolmaz, Devrim Karayer +3 more·Jun 23, 2026

In this work, the ground-state energy of the lithium atom is systematically investigated using both time-independent perturbation theory and the variational method to provide a comprehensive pedagogical analysis of many-body atomic systems. The unper...

Chunlai Yang, Shuheng Liu, Xinyao Huang +2 more·Jun 23, 2026

Exceptional points (EPs) are non-Hermitian spectral singularities exhibiting fractional-power responses, yet their implications for multipartite entanglement of interacting quantum many-body systems remain largely unexplored. Here we develop a genera...

Sihong Shao, Yuehan Shao·Jun 23, 2026

Recent advances in dynamical low-rank approximation (DLRA) have demonstrated its effectiveness in high-dimensional simulations. However, existing DLRA algorithms still face significant challenges when handling systems that involve complex collision t...

Tao Min, Junjie Liu·Jun 23, 2026

Understanding the dynamical evolution of non-Hermitian systems under extra external dissipation is essential. Dephasing, a major realistic dissipation, is conventionally considered detrimental to information processing. However, its impact on non-Her...

Shuyi Chen, Zhengchang Hua, Nikos Tziritas +1 more·Jun 23, 2026

Terrestrial AI training faces an unsustainable energy and water crisis, positioning Orbital Data Centers (ODCs) as a "zero operational carbon" alternative. However, the sub-$10μ\text{s}$ communication latency required for synchronized scientific work...

Sungyeon Kook, Yujin Kang, Ilkwon Sohn +1 more·Jun 23, 2026

We propose a design framework for reconstructing gate-based magic state distillation protocols as compact joint-measurement architectures implementable with the surface code. The goal is to reduce the surface-code resource cost of a magic state facto...

Hamed Vakili·Jun 23, 2026

We propose gate-defined spin qubits in electrostatically confined altermagnetic quantum dots. Elliptical confinement of the $d$-wave altermagnetic structure produces a low-energy doublet with opposite spin polarization. For the range of parameters us...

Jocelyn Li, Margaret Martonosi·Jun 23, 2026

Fault-tolerant quantum computing is essential for realizing the substantial computational speedups that quantum computing can bring, but it requires real-time error decoding with high performance. Speculative window decoding improves performance by r...

Dong-Gil Im, Jungmo Lee, Kyungdeuk Park +3 more·Jun 23, 2026

Entangled photon sources with high spectral brightness are important resources for photonic quantum information processing, particularly in quantum communication and quantum networking where usable photon flux of entangled photons is often constraine...

Mamoru Endo, Kan Takase, Takefumi Nomura +12 more·Jun 22, 2026

Non-Gaussian states are essential resources for universal, fault-tolerant optical quantum computing, but their generation rate remains limited by low heralding probabilities and operation in nanosecond temporal modes. Here, we demonstrate multi-photo...

Anass Jad, Abderrahim El Allati, Mohammad B. Arjmandi·Jun 22, 2026

We analyse a two-cavity architecture, in which a lossy cavity hosting $N$ qubits is coherently coupled to an auxiliary cavity, as a resource for the storage phase of an open quantum battery at non-zero temperature. Within a local Lindblad treatment i...

Zachary E. Chin, Mario Motta, Javier Robledo Moreno +3 more·Jun 22, 2026

Computing quantum ground states is generically difficult, but additional structure can sometimes allow diagonalization to be recast as a more feasible problem. For example, when the desired ground state is sparse in a given basis, diagonalization can...

Austin R. Gamble Jarvi, Hamid R. Mohebbi, Ishit Raval +7 more·Jun 22, 2026

We present innovations that enable the use of superconducting resonators for high sensitivity, high bandwidth pulsed electron paramagnetic resonance (EPR) measurements on biologically relevant samples with enhanced stability and throughput. A custom-...

D. V. Donchenko, E. A. Anikin, O. Lakhmanskaya +1 more·Jun 22, 2026

We analyze the impact of correlated laser frequency noise on Mølmer-Sørensen gates in qubit registers based on trapped-ion chains. Using perturbation theory, we calculate gate fidelities in the presence of noise with arbitrary power spectral density ...

Carlos L. Benavides-Riveros, Prachi Sharma, Fedor Šimkovic·Jun 22, 2026

Imaginary-time evolution (ITE) underpins a broad family of algorithms for ground-state preparation in quantum simulation and quantum many-body physics. In these methods, convergence is governed by the energy variance of the instantaneous state, causi...

E. D. Chivilis, E. A. Tsygankov·Jun 22, 2026

We present the research of dynamic continuous-wave spectroscopy of the coherent population trapping resonance at the phase-jump modulation. Λ system of levels supplemented by a nonabsorbing state and bichromatic optical field, whose spectral componen...

Alauddin Ahmed·Jun 22, 2026

Dissipation is usually viewed as an obstacle to predicting quantum dynamics, yet it can also contract trajectories toward steady states and thereby suppress accumulated prediction errors, leaving it unclear whether dissipation ultimately helps or hin...

Carlos Sevilla-Gutiérrez, Purujit Singh Chauhan, Varun Raj Kaipalath +1 more·Jun 22, 2026

Single-mode-fiber-coupled spontaneous parametric down-conversion (SPDC) sources are a key resource for photonic quantum technologies, but in single-crystal geometries brightness, heralding efficiency, and spectral purity remain constrained by intrins...