AVS quantum science最新文献_第9页

A dialog on the fate of information in black hole evaporation 关于黑洞蒸发中信息命运的对话

AVS quantum science Pub Date : 2022-05-17 DOI: 10.1116/5.0091962

Alejandro Perez, D. Sudarsky

引用次数: 4

TV and video game streaming with a quantum receiver: A study on a Rydberg atom-based receiver's bandwidth and reception clarity 基于量子接收器的电视和视频游戏流:基于Rydberg原子的接收器带宽和接收清晰度的研究

AVS quantum science Pub Date : 2022-05-05 DOI: 10.1116/5.0098057

N. Prajapati, A. Rotunno, S. Berweger, M. Simons, A. Artusio-Glimpse, S. Voran, C. Holloway

引用次数: 16

Mesoscopic quantum thermo-mechanics: A new frontier of experimental physics 介观量子热力学:实验物理学的新前沿

AVS quantum science Pub Date : 2022-04-20 DOI: 10.1116/5.0086059

E. Collin

{"title":"Mesoscopic quantum thermo-mechanics: A new frontier of experimental physics","authors":"E. Collin","doi":"10.1116/5.0086059","DOIUrl":"https://doi.org/10.1116/5.0086059","url":null,"abstract":"In the last decade, experimentalists have demonstrated their impressive ability to control mechanical modes within mesoscopic objects down to the quantum level: it is now possible to create mechanical Fock states, to entangle mechanical modes from distinct objects, and to store quantum information or transfer it from one quantum bit to another, among the many possibilities found in today's literature. Indeed, mechanics is quantum, very much like spins or electromagnetic degrees of freedom; and all of this is, in particular, referred to as a new engineering resource for quantum technologies. However, there is also much more beyond this utilitarian aspect: invoking the original discussions of Braginsky and Caves, where a quantum oscillator is thought of as a quantum detector for a classical field, namely, a gravitational wave, which is also a unique sensing capability for quantum fields. The subject of study is then the baths to which the mechanical mode is coupled to, let them be known or unknown in nature. This Perspective is about this new potentiality that addresses stochastic thermodynamics, potentially down to its quantum version, the search for a fundamental underlying (random) field postulated in recent theories that can be affiliated to the class of the wave-function collapse models, and more generally open questions of condensed matter like the actual nature of the elusive (and ubiquitous) two-level systems present within all mechanical objects. However, such research turns out to be much more demanding than the use of a few quantum mechanical modes: all the known baths have to be identified, experiments have to be conducted in-equilibrium, and the word “mechanics” needs to be justified by a real ability to move substantially the center-of-mass when a proper drive tone is applied to the system.","PeriodicalId":93525,"journal":{"name":"AVS quantum science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47382153","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: 3

Gravitational time dilation in extended quantum systems: The case of light clocks in Schwarzschild spacetime 扩展量子系统中的引力时间膨胀:史瓦西时空中的光钟

AVS quantum science Pub Date : 2022-04-16 DOI: 10.1116/5.0123228

Tupac Bravo, D. Rätzel, I. Fuentes

引用次数: 1

Position fixing with cold atom gravity gradiometers 用冷原子重力梯度仪定位

AVS quantum science Pub Date : 2022-04-11 DOI: 10.1116/5.0095677

Alexander M. Phillips, M. J. Wright, I. Riou, S. Maddox, S. Maskell, J. Ralph

引用次数: 5

Trapping a free-propagating single-photon into an atomic ensemble as a quantum stationary light pulse 将自由传播的单光子作为量子静止光脉冲捕获到原子系综中

AVS quantum science Pub Date : 2022-04-08 DOI: 10.1116/5.0093545

U. Kim, Y. Ihn, Chung-Hyun Lee, Yoon-Ho Kim

{"title":"Trapping a free-propagating single-photon into an atomic ensemble as a quantum stationary light pulse","authors":"U. Kim, Y. Ihn, Chung-Hyun Lee, Yoon-Ho Kim","doi":"10.1116/5.0093545","DOIUrl":"https://doi.org/10.1116/5.0093545","url":null,"abstract":"Efficient photon–photon interaction is one of the key elements for realizing quantum information processing. The interaction, however, must often be mediated through an atomic medium due to the bosonic nature of photons, and the interaction time, which is critically linked to the efficiency, depends on the properties of the atom–photon interaction. While the electromagnetically induced transparency effect does offer the possibility of photonic quantum memory, it does not enhance the interaction time as it fully maps the photonic state to an atomic state. The stationary light pulse (SLP) effect, on the contrary, traps the photonic state inside an atomic medium with zero group velocity, opening up the possibility of enhanced interaction time. In this work, we report the first experimental demonstration of trapping a free-propagating single-photon into a cold atomic ensemble via the quantum SLP (QSLP) process. We conclusively show that the quantum properties of the single-photon state are preserved well during the QSLP process. Our work paves the way for new approaches for efficient photon–photon interactions, exotic photonic states, and many-body simulations in photonic systems.","PeriodicalId":93525,"journal":{"name":"AVS quantum science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42510883","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: 3

Comparison of two multiplexed portable cold-atom vacuum standards 两种多路便携式冷原子真空标准的比较

AVS quantum science Pub Date : 2022-04-07 DOI: 10.1116/5.0095011

L. Ehinger, B. Acharya, D. Barker, J. Fedchak, J. Scherschligt, E. Tiesinga, S. Eckel

引用次数: 6

A product picture for quantum electrodynamics 量子电动力学的乘积图

AVS quantum science Pub Date : 2022-04-03 DOI: 10.1116/5.0085813

B. S. Kay

{"title":"A product picture for quantum electrodynamics","authors":"B. S. Kay","doi":"10.1116/5.0085813","DOIUrl":"https://doi.org/10.1116/5.0085813","url":null,"abstract":"We present a short account of our work to provide quantum electrodynamics (QED) with a product picture. We aim to complement the longer exposition in a recent paper in Foundations of Physics and to help to make that work more accessible. The product picture is a formulation of QED, equivalent to standard Coulomb gauge QED, in which the Hilbert space arises as (a certain physical subspace of) a product of a Hilbert space for the electromagnetic field and a Hilbert space for charged matter (i.e., the Dirac field) and the Hamiltonian arises as the sum of an electromagnetic Hamiltonian, a charged matter Hamiltonian, and an interaction term. (The Coulomb gauge formulation of QED is not a product picture because, in it, the longitudinal part of the electromagnetic field is made out of charged matter operators.) We also recall a “Contradictory Commutator Theorem” for QED, which exposes flaws in previous attempts at temporal gauge quantization of QED, and we explain how our product picture appears to offer a way to overcome those flaws. Additionally, we discuss the extent to which that theorem may be generalized to Yang–Mills fields. We also develop a product picture for nonrelativistic charged particles in interaction with the electromagnetic field and point out how this leads to a novel way of thinking about the theory of many nonrelativistic electrically charged particles with Coulomb interactions. In an afterword, we explain how the provision of a product picture for QED gives hope that one will be able likewise to have a product picture for (Yang Mills and for) quantum gravity—the latter being needed to make sense of the author's matter-gravity entanglement hypothesis. Also, we briefly discuss some similarities and differences between that hypothesis and its predictions and ideas of Roger Penrose related to a possible role of gravity in quantum state reduction and related to cosmological entropy.","PeriodicalId":93525,"journal":{"name":"AVS quantum science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49256375","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: 3

Curvature without metric: the Penrose construction for half-flat pp-waves 无度规曲率:半平pp波的彭罗斯构造

AVS quantum science Pub Date : 2022-03-20 DOI: 10.1116/5.0074308

P. Aichelburg, H. Balasin

引用次数: 1

Directional detection of dark matter using solid-state quantum sensing 利用固态量子传感的暗物质定向探测

AVS quantum science Pub Date : 2022-03-11 DOI: 10.1116/5.0117301

R. Ebadi, M. C. Marshall, D. Phillips, Johannes W. Cremer, T. Zhou, Michael Titze, P. Kehayias, M. Saleh Ziabari, N. Delegan, S. Rajendran, A. Sushkov, F. Heremans, E. Bielejec, M. Holt, R. Walsworth

{"title":"Directional detection of dark matter using solid-state quantum sensing","authors":"R. Ebadi, M. C. Marshall, D. Phillips, Johannes W. Cremer, T. Zhou, Michael Titze, P. Kehayias, M. Saleh Ziabari, N. Delegan, S. Rajendran, A. Sushkov, F. Heremans, E. Bielejec, M. Holt, R. Walsworth","doi":"10.1116/5.0117301","DOIUrl":"https://doi.org/10.1116/5.0117301","url":null,"abstract":"Next-generation dark matter (DM) detectors searching for weakly interacting massive particles (WIMPs) will be sensitive to coherent scattering from solar neutrinos, demanding an efficient background-signal discrimination tool. Directional detectors improve sensitivity to WIMP DM despite the irreducible neutrino background. Wide-bandgap semiconductors offer a path to directional detection in a high-density target material. A detector of this type operates in a hybrid mode. The WIMP or neutrino-induced nuclear recoil is detected using real-time charge, phonon, or photon collection. The directional signal, however, is imprinted as a durable sub-micron damage track in the lattice structure. This directional signal can be read out by a variety of atomic physics techniques, from point defect quantum sensing to x-ray microscopy. In this Review, we present the detector principle as well as the status of the experimental techniques required for directional readout of nuclear recoil tracks. Specifically, we focus on diamond as a target material; it is both a leading platform for emerging quantum technologies and a promising component of next-generation semiconductor electronics. Based on the development and demonstration of directional readout in diamond over the next decade, a future WIMP detector will leverage or motivate advances in multiple disciplines toward precision dark matter and neutrino physics.","PeriodicalId":93525,"journal":{"name":"AVS quantum science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42692523","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: 13