arXiv - PHYS - Atomic Physics最新文献_第10页

Polarizabilities as Probes for P, T, and PT Violation 作为 P、T 和 PT Violation 探针的极化率

arXiv - PHYS - Atomic Physics Pub Date : 2024-07-19 DOI: arxiv-2407.14694

Sebastian Lahs, Daniel Comparat

引用次数: 0

Angular momentum dependence in multiphoton ionization and attosecond time delays 多光子电离中的角动量依赖性和阿秒级时间延迟

arXiv - PHYS - Atomic Physics Pub Date : 2024-07-19 DOI: arxiv-2407.14160

Jakub Benda, Zdeněk Mašín, Sreelakshmi Palakkal, Franck Lépine, Saikat Nandi, Vincent Loriot

{"title":"Angular momentum dependence in multiphoton ionization and attosecond time delays","authors":"Jakub Benda, Zdeněk Mašín, Sreelakshmi Palakkal, Franck Lépine, Saikat Nandi, Vincent Loriot","doi":"arxiv-2407.14160","DOIUrl":"https://doi.org/arxiv-2407.14160","url":null,"abstract":"Attosecond ionization time-delays at photoelectron energies above typically\u000010 eV are usually interpreted using the so called asymptotic approximation as a\u0000sum of the atomic or molecular delays with a universal laser-induced\u0000contribution. Here, we employ a two-harmonic RABITT (Reconstruction of\u0000Attosecond Beating by Interference of Two-photon Transitions) configuration to\u0000isolate the multiphoton pathways and measure the ionization time delays as a\u0000function of the dressing field intensity. We show that the validity of the\u0000asymptotic theory can be extended to the threshold or to higher-order\u0000contributions by rigorously treating the angular-momentum dependence of the\u0000continuum-continuum transitions into universal and easily computable\u0000partial-wave-specific correction factors. Our asymptotic treatment is also\u0000valid for higher-order interfering amplitudes while significantly simplifying\u0000their evaluation and providing a transparent physical interpretation. The\u0000validity of the method for atomic and molecular targets in the vicinity of\u0000resonances, ionization thresholds, and for both the emission-integrated and\u0000angularly resolved signal is confirmed by comparison to ab initio calculations\u0000over a wide energy range.","PeriodicalId":501039,"journal":{"name":"arXiv - PHYS - Atomic Physics","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141745468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measurement of Casimir-Polder interaction for slow atoms through a material grating 测量慢速原子通过材料光栅时的卡西米尔-波德尔相互作用

arXiv - PHYS - Atomic Physics Pub Date : 2024-07-19 DOI: arxiv-2407.14077

Julien LecoffreLPL, Ayoub HadiLPL, Matthieu BruneauLPL, Charles GarcionLPL, Nathalie FabreLPL, Eric CharronISM, Naceur GaaloulLPL, Gabriel DutierLPL, Quentin BoutonLPL

引用次数: 0

Generalised hydrogen interactions with $texttt{CINCO}$: a window to new physics 与 $texttt{CINCO}$的广义氢相互作用：通向新物理学的窗口

arXiv - PHYS - Atomic Physics Pub Date : 2024-07-17 DOI: arxiv-2407.12913

Martin Bauer, Javier Perez-Soler, Jack D. Shergold

引用次数: 0

Beyond Energy: Teleporting Current, Charge, and More 超越能量：瞬移电流、电荷等

arXiv - PHYS - Atomic Physics Pub Date : 2024-07-17 DOI: arxiv-2407.12359

Kazuki Ikeda

引用次数: 0

Emergence of second-order coherence in superfluorescence 超荧光中二阶相干的出现

arXiv - PHYS - Atomic Physics Pub Date : 2024-07-17 DOI: arxiv-2407.12549

Constanze Bach, Felix Tebbenjohanns, Christian Liedl, Philipp Schneeweiss, Arno Rauschenbeutel

{"title":"Emergence of second-order coherence in superfluorescence","authors":"Constanze Bach, Felix Tebbenjohanns, Christian Liedl, Philipp Schneeweiss, Arno Rauschenbeutel","doi":"arxiv-2407.12549","DOIUrl":"https://doi.org/arxiv-2407.12549","url":null,"abstract":"We experimentally investigate the second-order quantum coherence function of\u0000a superradiant burst in a cascaded quantum system. We chirally (i.e.\u0000direction-dependently) couple roughly 900 cesium atoms to the forward\u0000propagating mode of an optical nanofiber. We then prepare the ensemble in the\u0000maximally inverted state, where the subsequent collective emission of a burst\u0000is known as superfluorescence. Here, we observe that second-order coherence\u0000emerges in the course of the decay. This is a clear feature of the underlying\u0000collective dynamics that is also at the origin of the superradiant burst\u0000itself. We furthermore study the dynamics of the second-order coherence\u0000function of the emission in dependence on the initial average dipole moment of\u0000the ensemble. In addition, by correlating the detection of early and late\u0000photon emission events, we obtain evidence for fundamental shot-to-shot\u0000fluctuations in the delay of the start of the burst emission. Our findings\u0000reveal that, despite the fundamentally different coupling Hamiltonian,\u0000superradiance in cascaded and symmetrically coupled systems feature a\u0000strikingly large number of similarities.","PeriodicalId":501039,"journal":{"name":"arXiv - PHYS - Atomic Physics","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141745467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Feynman Diagrams for Matter Wave Interferometry 物质波干涉测量的费曼图

arXiv - PHYS - Atomic Physics Pub Date : 2024-07-16 DOI: arxiv-2407.11446

Jonah Glick, Tim Kovachy

{"title":"Feynman Diagrams for Matter Wave Interferometry","authors":"Jonah Glick, Tim Kovachy","doi":"arxiv-2407.11446","DOIUrl":"https://doi.org/arxiv-2407.11446","url":null,"abstract":"We introduce a new theoretical framework based on Feynman diagrams to compute\u0000phase shifts in matter wave interferometry. The method allows for analytic\u0000computation of higher order quantum corrections, beyond the traditional\u0000semi-classical approximation. These additional terms depend on the finite size\u0000of the initial matter wavefunction and/or have higher order dependence on\u0000$hbar$. We apply the method to compute the response of matter wave\u0000interferometers to power law potentials and potentials with an arbitrary\u0000spatial dependence. The analytic expressions are validated by comparing to\u0000numerical simulations, and estimates are provided for the scale of the quantum\u0000corrections to the phase shift response to the gravitational field of the\u0000earth, anharmonic trapping potentials, and gravitational fields from local\u0000proof masses. We find that for certain experimentally feasible parameters,\u0000these corrections are large enough to be measured, and could lead to systematic\u0000errors if not accounted for. We anticipate these corrections will be especially\u0000important for trapped matter wave interferometers and for free-space matter\u0000wave interferometers in the presence of proof masses. These interferometers are\u0000becoming increasingly sensitive tools for mobile inertial sensing, gravity\u0000surveying, tests of gravity and its interplay with quantum mechanics, and\u0000searches for dark energy.","PeriodicalId":501039,"journal":{"name":"arXiv - PHYS - Atomic Physics","volume":"74 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141721040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-reservoir enhanced loading of tweezer atom arrays 增强镊子原子阵列的多储层加载能力

arXiv - PHYS - Atomic Physics Pub Date : 2024-07-16 DOI: arxiv-2407.11665

Xu Yan, Chengdong He, Kai Wen, Zejian Ren, Preston Tsz Fung Wong, Elnur Hajiyev, Gyu-Boong Jo

引用次数: 0

Controllable interatomic interaction mediated by diffractive coupling in a cavity 以空腔中的衍射耦合为媒介的可控原子间相互作用

arXiv - PHYS - Atomic Physics Pub Date : 2024-07-15 DOI: arxiv-2407.10690

Ivor Krešić

{"title":"Controllable interatomic interaction mediated by diffractive coupling in a cavity","authors":"Ivor Krešić","doi":"arxiv-2407.10690","DOIUrl":"https://doi.org/arxiv-2407.10690","url":null,"abstract":"Photon-mediated interaction can be used for simulating complex many-body\u0000phenomena with ultracold atoms coupled to electromagnetic modes of an optical\u0000resonator. We theoretically study a method of producing controllable\u0000interatomic interaction mediated by forward-diffracted photons circulating\u0000inside a ring cavity. One example of such a system is the three-mode cavity,\u0000where an on-axis mode can coexist with two diffracted sidebands. We demonstrate\u0000how the self-organized stripe states of a Bose-Einstein condensate (BEC)\u0000occurring in this cavity geometry can exhibit supersolid properties, due to\u0000spontaneous breaking of the Hamiltonian's continuous translational symmetry. A\u0000numerical study of the collective excitation spectrum of these states\u0000demonstrates the existence of massles and finite-gap excitations, which are\u0000identified as phase (Goldstone) and amplitude (Higgs) atomic density modes. We\u0000further demonstrate how judicious Fourier filtering of intracavity light can be\u0000used to engineer the effective atom-atom interaction profile for many cavity\u0000modes. The numerical results in this configuration show the existence of\u0000droplet array and single droplet BEC states for commensurate and incommensurate\u0000cavity modes, respectively. Diffractive coupling in a cavity is thereby\u0000introduced as a novel route towards tailoring the photon-mediated interaction\u0000of ultracold atoms. Spatial features of the self-organized optical potentials\u0000can here be tuned to scales several times larger than the pump laser\u0000wavelength, such that the corresponding atomic density distributions could be\u0000imaged and manipulated using low numerical aperture optics. These calculations\u0000and insights pave the way towards quantum simulation of exotic nonequilibrium\u0000many-body physics with condensates in a cavity.","PeriodicalId":501039,"journal":{"name":"arXiv - PHYS - Atomic Physics","volume":"78 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141720978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scalable Networking of Neutral-Atom Qubits: Nanofiber-Based Approach for Multiprocessor Fault-Tolerant Quantum Computer 中性原子量子位的可扩展网络：基于纳米纤维的多处理器容错量子计算机方法

arXiv - PHYS - Atomic Physics Pub Date : 2024-07-15 DOI: arxiv-2407.11111

Shinichi Sunami, Shiro Tamiya, Ryotaro Inoue, Hayata Yamasaki, Akihisa Goban

{"title":"Scalable Networking of Neutral-Atom Qubits: Nanofiber-Based Approach for Multiprocessor Fault-Tolerant Quantum Computer","authors":"Shinichi Sunami, Shiro Tamiya, Ryotaro Inoue, Hayata Yamasaki, Akihisa Goban","doi":"arxiv-2407.11111","DOIUrl":"https://doi.org/arxiv-2407.11111","url":null,"abstract":"Neutral atoms are among the leading platforms toward realizing fault-tolerant\u0000quantum computation (FTQC). However, scaling up a single neutral-atom device\u0000beyond $sim 10^4$ atoms to meet the demands of FTQC for practical applications\u0000remains a challenge. To overcome this challenge, we clarify the criteria and\u0000technological requirements for further scaling based on multiple neutral atom\u0000quantum processing units (QPUs) connected through photonic networking links.\u0000Our quantitative analysis shows that nanofiber optical cavities have the\u0000potential as an efficient atom-photon interface to enable fast entanglement\u0000generation between atoms in distinct neutral-atom modules, allowing multiple\u0000neutral-atom QPUs to operate cooperatively without sacrificing computational\u0000speed. Using state-of-the-art millimeter-scale nanofiber cavities with the\u0000finesse of thousands, over a hundred atoms can be coupled to the cavity mode\u0000with an optical tweezer array, with expected single-atom cooperativity\u0000exceeding 100 for telecom-band transition of ytterbium atoms. This enables\u0000efficient time-multiplexed entanglement generation with a predicted Bell pair\u0000generation rate of 100 kHz while maintaining a small footprint for channel\u0000multiplexing. These proposals and results indicate a promising pathway for\u0000building large-scale multiprocessor fault-tolerant quantum computers using\u0000neutral atoms, nanofiber optical cavities, and fiber-optic networks.","PeriodicalId":501039,"journal":{"name":"arXiv - PHYS - Atomic Physics","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141720976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0