Pub Date : 2024-06-11DOI: 10.1103/physreva.109.063316
Wei-Tao Wu, Zhiwei Duan, Sheng-Jun Yang
{"title":"Observation of collapse and revival of atomic four-wave mixing in Bose gases","authors":"Wei-Tao Wu, Zhiwei Duan, Sheng-Jun Yang","doi":"10.1103/physreva.109.063316","DOIUrl":"https://doi.org/10.1103/physreva.109.063316","url":null,"abstract":"","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141356514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-11DOI: 10.1103/physreva.109.063113
Rostislav Arkhipov, Mikhail Arkhipov, Anton Pakhomov, O. Diachkova, N. Rosanov
{"title":"Generation and control of population difference gratings in a three-level hydrogen atomic medium using half-cycle attosecond pulses nonoverlapping in the medium","authors":"Rostislav Arkhipov, Mikhail Arkhipov, Anton Pakhomov, O. Diachkova, N. Rosanov","doi":"10.1103/physreva.109.063113","DOIUrl":"https://doi.org/10.1103/physreva.109.063113","url":null,"abstract":"","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141357495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-11DOI: 10.1103/physreva.109.062605
S. Ataman, Karunesh K. Mishra
{"title":"Quantum Fisher information maximization in an unbalanced lossy interferometer","authors":"S. Ataman, Karunesh K. Mishra","doi":"10.1103/physreva.109.062605","DOIUrl":"https://doi.org/10.1103/physreva.109.062605","url":null,"abstract":"","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141359295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-10DOI: 10.1103/physreva.109.062805
K. H. Spicer, C. Plowman, N. W. Antonio, M. S. Schöffler, M. Schulz, A. S. Kadyrov
{"title":"Ruling out a saddle-point mechanism of ionization in intermediate-energy ion-atom collisions","authors":"K. H. Spicer, C. Plowman, N. W. Antonio, M. S. Schöffler, M. Schulz, A. S. Kadyrov","doi":"10.1103/physreva.109.062805","DOIUrl":"https://doi.org/10.1103/physreva.109.062805","url":null,"abstract":"","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141365939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-10DOI: 10.1103/physreva.109.063510
Luis Cortes-Herrera, Xiaotong He, Jaime Cardenas, G. P. Agrawal
{"title":"Proposal and efficiency analysis of cascaded adiabatic frequency conversion in coupled microrings","authors":"Luis Cortes-Herrera, Xiaotong He, Jaime Cardenas, G. P. Agrawal","doi":"10.1103/physreva.109.063510","DOIUrl":"https://doi.org/10.1103/physreva.109.063510","url":null,"abstract":"","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141363841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-10DOI: 10.1103/physreva.109.062804
F. Grussie, Lukas Berger, Manfred Grieser, Á. Kálosi, D. Müll, Oldřich Novotný, Aigars Znotins, Fabrice Dayou, Xavier Urbain, Holger Kreckel
Ion-neutral reactions are driving the formation of small molecules in the gas phase of interstellar clouds, where hydrogen molecules and their ions are by far the most important collision partners for any species in the astrochemical network. Here we present absolute rate coefficient measurements for the reactions HD++C→CH+/CD++D/H and H3++C→CH+/CH2++H2/H obtained using a recently commissioned ion-neutral collision setup at the Cryogenic Storage Ring. Our measurements with vibrationally cold ions result in significantly higher rate coefficients when compared with previous studies using internally excited ions, bringing them in better agreement with classical capture theories. Moreover, we have performed detailed quasiclassical trajectory (QCT) calculations for the HD++C reaction, using new potential energy surfaces. Our experimental results and the QCT calculations show very good agreement for the absolute cross section of the reactions, as well as for the isotope effect. These results have great potential relevance for the chemistry of the interstellar medium and the onset of organic chemistry in space. Published by the American Physical Society 2024
{"title":"Absolute rate coefficient measurements of the reactions of vibrationally cold \u0000<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:msup><mml:mrow><mml:mi>HD</mml:mi></mml:mrow><mml:mo>+</mml:mo></mml:msup></mml:math>\u0000 and \u0000<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:msubs","authors":"F. Grussie, Lukas Berger, Manfred Grieser, Á. Kálosi, D. Müll, Oldřich Novotný, Aigars Znotins, Fabrice Dayou, Xavier Urbain, Holger Kreckel","doi":"10.1103/physreva.109.062804","DOIUrl":"https://doi.org/10.1103/physreva.109.062804","url":null,"abstract":"Ion-neutral reactions are driving the formation of small molecules in the gas phase of interstellar clouds, where hydrogen molecules and their ions are by far the most important collision partners for any species in the astrochemical network. Here we present absolute rate coefficient measurements for the reactions HD++C→CH+/CD++D/H and H3++C→CH+/CH2++H2/H obtained using a recently commissioned ion-neutral collision setup at the Cryogenic Storage Ring. Our measurements with vibrationally cold ions result in significantly higher rate coefficients when compared with previous studies using internally excited ions, bringing them in better agreement with classical capture theories. Moreover, we have performed detailed quasiclassical trajectory (QCT) calculations for the HD++C reaction, using new potential energy surfaces. Our experimental results and the QCT calculations show very good agreement for the absolute cross section of the reactions, as well as for the isotope effect. These results have great potential relevance for the chemistry of the interstellar medium and the onset of organic chemistry in space.\u0000 \u0000 \u0000 \u0000 \u0000 Published by the American Physical Society\u0000 2024\u0000 \u0000 \u0000","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141363948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-10DOI: 10.1103/PhysRevA.109.L061502
B. Midya
We investigate the exact solvability and point-gap topological phase transitions in non-Hermitian lattice models. These models incorporate site-dependent nonreciprocal hoppings $J e^{pm g_n}$, facilitated by a spatially fluctuating imaginary gauge field $ig_n hat~x$ that disrupts translational symmetry. By employing suitable imaginary gauge transformations, it is revealed that a lattice characterized by any given $g_n$ is spectrally equivalent to a lattice devoid of fields, under open boundary conditions. Furthermore, a system with closed boundaries can be simplified to a spectrally equivalent lattice featuring a uniform mean field $ibar{g}hat~x$. This framework offers a comprehensive method for analytically predicting spectral topological invariance and associated boundary localization phenomena for bond-disordered nonperiodic lattices. These predictions are made by analyzing gauge-transformed isospectral periodic lattices. Notably, for a lattice with quasiperiodic $g_n= ln |lambda cos 2pi alpha n|$ and an irrational $alpha$, a previously unknown topological phase transition is unveiled. It is observed that the topological spectral index $W$ assumes values of $-N$ or $+N$, leading to all $N$ open-boundary eigenstates localizing either at the right or left edge, solely dependent on the strength of the gauge field, where $lambda<2$ or $lambda>2$. A phase transition is identified at the critical point $lambdaapprox2$, at which all eigenstates undergo delocalization. The theory has been shown to be relevant for long-range hopping models and for higher dimensions.
{"title":"Topological phase transition in fluctuating imaginary gauge fields","authors":"B. Midya","doi":"10.1103/PhysRevA.109.L061502","DOIUrl":"https://doi.org/10.1103/PhysRevA.109.L061502","url":null,"abstract":"We investigate the exact solvability and point-gap topological phase transitions in non-Hermitian lattice models. These models incorporate site-dependent nonreciprocal hoppings $J e^{pm g_n}$, facilitated by a spatially fluctuating imaginary gauge field $ig_n hat~x$ that disrupts translational symmetry. By employing suitable imaginary gauge transformations, it is revealed that a lattice characterized by any given $g_n$ is spectrally equivalent to a lattice devoid of fields, under open boundary conditions. Furthermore, a system with closed boundaries can be simplified to a spectrally equivalent lattice featuring a uniform mean field $ibar{g}hat~x$. This framework offers a comprehensive method for analytically predicting spectral topological invariance and associated boundary localization phenomena for bond-disordered nonperiodic lattices. These predictions are made by analyzing gauge-transformed isospectral periodic lattices. Notably, for a lattice with quasiperiodic $g_n= ln |lambda cos 2pi alpha n|$ and an irrational $alpha$, a previously unknown topological phase transition is unveiled. It is observed that the topological spectral index $W$ assumes values of $-N$ or $+N$, leading to all $N$ open-boundary eigenstates localizing either at the right or left edge, solely dependent on the strength of the gauge field, where $lambda<2$ or $lambda>2$. A phase transition is identified at the critical point $lambdaapprox2$, at which all eigenstates undergo delocalization. The theory has been shown to be relevant for long-range hopping models and for higher dimensions.","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141361495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-10DOI: 10.1103/physreva.109.063108
Chintan Shah, S. Kühn, Sonja Bernitt, René Steinbrügge, Moto Togawa, Lukas Berger, Jen Buck, Moritz Hoesch, J. Seltmann, Mikhail G. Kozlov, S. Porsev, Ming Feng Gu, F. S. Porter, Thomas Pfeifer, M. A. Leutenegger, Charles Cheung, M. S. Safronova, José R. Crespo López-Urrutia
We used the monochromatic soft-x-ray beamline P04 at the synchrotron-radiation facility PETRA III to resonantly excite the strongest 2p−3d transitions in neonlike Ni ions, [2p6]J=0→[(2p5)1/23d3/2]J=1 and [2p6]J=0→[(2p5)3/23d5/2]J=1, respectively dubbed 3C and 3D, achieving a resolving power of 15 000 and signal-to-background ratio of 30. We obtain their natural linewidths, with an accuracy of better than 10%, as well as the oscillator-strength ratio f(3C)/f(3D)=2.51(11) from analysis of the resonant fluorescence spectra. These results agree with those of previous experiments, earlier predictions, and our own advanced calculations.Published by the American Physical Society
我们利用同步辐射设施 PETRA III 的单色软 X 射线光束线 P04 共振激发了氖型镍离子中最强的 2p-3d 转变：[2p6]J=0→[(2p5)1/23d3/2]J=1 和 [2p6]J=0→[(2p5)3/23d5/2]J=1 （分别称为 3C 和 3D ），分辨力达到 15 000，信噪比为 30。通过分析共振荧光光谱，我们得到了它们的自然线宽（精确度优于 10%）以及振荡器强度比 f(3C)/f(3D)=2.51(11)。这些结果与之前的实验、早期预测以及我们自己的高级计算结果一致。 美国物理学会出版 2024
{"title":"Natural-linewidth measurements of the \u0000<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:mn>3</mml:mn><mml:mi>C</mml:mi></mml:math>\u0000 and \u0000<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:mn>3</mml:mn><mml:mi>D</mml:mi></mml:math>\u0000 soft-x-ray transitions in Ni xix","authors":"Chintan Shah, S. Kühn, Sonja Bernitt, René Steinbrügge, Moto Togawa, Lukas Berger, Jen Buck, Moritz Hoesch, J. Seltmann, Mikhail G. Kozlov, S. Porsev, Ming Feng Gu, F. S. Porter, Thomas Pfeifer, M. A. Leutenegger, Charles Cheung, M. S. Safronova, José R. Crespo López-Urrutia","doi":"10.1103/physreva.109.063108","DOIUrl":"https://doi.org/10.1103/physreva.109.063108","url":null,"abstract":"<jats:p>We used the monochromatic soft-x-ray beamline P04 at the synchrotron-radiation facility PETRA III to resonantly excite the strongest <a:math xmlns:a=\"http://www.w3.org/1998/Math/MathML\"><a:mrow><a:mn>2</a:mn><a:mi>p</a:mi><a:mtext>−</a:mtext><a:mn>3</a:mn><a:mi>d</a:mi></a:mrow></a:math> transitions in neonlike <b:math xmlns:b=\"http://www.w3.org/1998/Math/MathML\"><b:mi>Ni</b:mi><b:mspace width=\"0.28em\"/></b:math> ions, <d:math xmlns:d=\"http://www.w3.org/1998/Math/MathML\"><d:mrow><d:msub><d:mrow><d:mo>[</d:mo><d:mn>2</d:mn><d:msup><d:mi>p</d:mi><d:mn>6</d:mn></d:msup><d:mo>]</d:mo></d:mrow><d:mrow><d:mi>J</d:mi><d:mo>=</d:mo><d:mn>0</d:mn></d:mrow></d:msub><d:mo>→</d:mo><d:msub><d:mrow><d:mo>[</d:mo><d:msub><d:mrow><d:mo>(</d:mo><d:mn>2</d:mn><d:msup><d:mi>p</d:mi><d:mn>5</d:mn></d:msup><d:mo>)</d:mo></d:mrow><d:mrow><d:mn>1</d:mn><d:mo>/</d:mo><d:mn>2</d:mn></d:mrow></d:msub><d:mspace width=\"0.16em\"/><d:mn>3</d:mn><d:msub><d:mi>d</d:mi><d:mrow><d:mn>3</d:mn><d:mo>/</d:mo><d:mn>2</d:mn></d:mrow></d:msub><d:mo>]</d:mo></d:mrow><d:mrow><d:mi>J</d:mi><d:mo>=</d:mo><d:mn>1</d:mn></d:mrow></d:msub></d:mrow></d:math> and <f:math xmlns:f=\"http://www.w3.org/1998/Math/MathML\"><f:mrow><f:msub><f:mrow><f:mo>[</f:mo><f:mn>2</f:mn><f:msup><f:mi>p</f:mi><f:mn>6</f:mn></f:msup><f:mo>]</f:mo></f:mrow><f:mrow><f:mi>J</f:mi><f:mo>=</f:mo><f:mn>0</f:mn></f:mrow></f:msub><f:mo>→</f:mo><f:msub><f:mrow><f:mo>[</f:mo><f:msub><f:mrow><f:mo>(</f:mo><f:mn>2</f:mn><f:msup><f:mi>p</f:mi><f:mn>5</f:mn></f:msup><f:mo>)</f:mo></f:mrow><f:mrow><f:mn>3</f:mn><f:mo>/</f:mo><f:mn>2</f:mn></f:mrow></f:msub><f:mspace width=\"0.16em\"/><f:mn>3</f:mn><f:msub><f:mi>d</f:mi><f:mrow><f:mn>5</f:mn><f:mo>/</f:mo><f:mn>2</f:mn></f:mrow></f:msub><f:mo>]</f:mo></f:mrow><f:mrow><f:mi>J</f:mi><f:mo>=</f:mo><f:mn>1</f:mn></f:mrow></f:msub></f:mrow></f:math>, respectively dubbed <h:math xmlns:h=\"http://www.w3.org/1998/Math/MathML\"><h:mrow><h:mn>3</h:mn><h:mi>C</h:mi></h:mrow></h:math> and <i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\"><i:mrow><i:mn>3</i:mn><i:mi>D</i:mi></i:mrow></i:math>, achieving a resolving power of 15 000 and signal-to-background ratio of 30. We obtain their natural linewidths, with an accuracy of better than 10%, as well as the oscillator-strength ratio <j:math xmlns:j=\"http://www.w3.org/1998/Math/MathML\"><j:mrow><j:mi>f</j:mi><j:mo>(</j:mo><j:mn>3</j:mn><j:mi>C</j:mi><j:mo>)</j:mo><j:mo>/</j:mo><j:mi>f</j:mi><j:mo>(</j:mo><j:mn>3</j:mn><j:mi>D</j:mi><j:mo>)</j:mo><j:mo>=</j:mo><j:mn>2.51</j:mn><j:mo>(</j:mo><j:mn>11</j:mn><j:mo>)</j:mo></j:mrow></j:math> from analysis of the resonant fluorescence spectra. These results agree with those of previous experiments, earlier predictions, and our own advanced calculations.</jats:p>\u0000 <jats:sec>\u0000 <jats:title/>\u0000 <jats:supplementary-material>\u0000 <jats:permissions>\u0000 <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement>\u0000 ","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141365917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Probing field-driven electron dynamics of gapped graphene by intensity-dependent valley polarization","authors":"Miao Yu, Hongchuan Du, Jia Tan, Kunlong Liu, Peixiang Lu, Yueming Zhou","doi":"10.1103/physreva.109.063106","DOIUrl":"https://doi.org/10.1103/physreva.109.063106","url":null,"abstract":"","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141375623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-07DOI: 10.1103/physreva.109.063314
Rukuan Wu
{"title":"Beliaev damping of gapped excitations in a two-component Bose-Einstein condensate","authors":"Rukuan Wu","doi":"10.1103/physreva.109.063314","DOIUrl":"https://doi.org/10.1103/physreva.109.063314","url":null,"abstract":"","PeriodicalId":48702,"journal":{"name":"Physical Review a","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141371267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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