Yicheng Bao, Scarlett S. Yu, Jiaqi You, Loïc Anderegg, Eunmi Chae, Wolfgang Ketterle, Kang-Kuen Ni, John M. Doyle
{"title":"拉曼边带冷却光镊阵列中的分子至三维运动基态","authors":"Yicheng Bao, Scarlett S. Yu, Jiaqi You, Loïc Anderegg, Eunmi Chae, Wolfgang Ketterle, Kang-Kuen Ni, John M. Doyle","doi":"10.1103/physrevx.14.031002","DOIUrl":null,"url":null,"abstract":"Ultracold polar molecules are promising for quantum information processing and searches for physics beyond the standard model. Laser cooling to ultracold temperatures is an established technique for trapped diatomic and triatomic molecules. Further cooling of the molecules to near the motional ground state is crucial for reducing various dephasings in quantum and precision applications. In this work, we demonstrate Raman sideband cooling (RSC) of CaF molecules in optical tweezers to near their motional ground state, with average motional occupation quantum numbers of <math display=\"inline\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mover accent=\"true\"><mi>n</mi><mo stretchy=\"false\">¯</mo></mover><mi>x</mi></msub><mo>=</mo><mn>0.16</mn><mo stretchy=\"false\">(</mo><mn>12</mn><mo stretchy=\"false\">)</mo></math>, <math display=\"inline\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mover accent=\"true\"><mi>n</mi><mo stretchy=\"false\">¯</mo></mover><mi>y</mi></msub><mo>=</mo><mn>0.17</mn><mo stretchy=\"false\">(</mo><mn>17</mn><mo stretchy=\"false\">)</mo></math> (radial directions), and <math display=\"inline\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mover accent=\"true\"><mi>n</mi><mo stretchy=\"false\">¯</mo></mover><mi>z</mi></msub><mo>=</mo><mn>0.22</mn><mo stretchy=\"false\">(</mo><mn>16</mn><mo stretchy=\"false\">)</mo></math> (axial direction), and a 3-D motional-ground-state probability of <math display=\"inline\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mn>54</mn><mo>±</mo><mn>18</mn><mo>%</mo></math> of the molecules that survive the RSC. This process paves the way to increase molecular coherence times in optical tweezers for robust quantum computation and simulation applications.","PeriodicalId":20161,"journal":{"name":"Physical Review X","volume":null,"pages":null},"PeriodicalIF":11.6000,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Raman Sideband Cooling of Molecules in an Optical Tweezer Array to the 3D Motional Ground State\",\"authors\":\"Yicheng Bao, Scarlett S. Yu, Jiaqi You, Loïc Anderegg, Eunmi Chae, Wolfgang Ketterle, Kang-Kuen Ni, John M. Doyle\",\"doi\":\"10.1103/physrevx.14.031002\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Ultracold polar molecules are promising for quantum information processing and searches for physics beyond the standard model. Laser cooling to ultracold temperatures is an established technique for trapped diatomic and triatomic molecules. Further cooling of the molecules to near the motional ground state is crucial for reducing various dephasings in quantum and precision applications. In this work, we demonstrate Raman sideband cooling (RSC) of CaF molecules in optical tweezers to near their motional ground state, with average motional occupation quantum numbers of <math display=\\\"inline\\\" xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><msub><mover accent=\\\"true\\\"><mi>n</mi><mo stretchy=\\\"false\\\">¯</mo></mover><mi>x</mi></msub><mo>=</mo><mn>0.16</mn><mo stretchy=\\\"false\\\">(</mo><mn>12</mn><mo stretchy=\\\"false\\\">)</mo></math>, <math display=\\\"inline\\\" xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><msub><mover accent=\\\"true\\\"><mi>n</mi><mo stretchy=\\\"false\\\">¯</mo></mover><mi>y</mi></msub><mo>=</mo><mn>0.17</mn><mo stretchy=\\\"false\\\">(</mo><mn>17</mn><mo stretchy=\\\"false\\\">)</mo></math> (radial directions), and <math display=\\\"inline\\\" xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><msub><mover accent=\\\"true\\\"><mi>n</mi><mo stretchy=\\\"false\\\">¯</mo></mover><mi>z</mi></msub><mo>=</mo><mn>0.22</mn><mo stretchy=\\\"false\\\">(</mo><mn>16</mn><mo stretchy=\\\"false\\\">)</mo></math> (axial direction), and a 3-D motional-ground-state probability of <math display=\\\"inline\\\" xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mn>54</mn><mo>±</mo><mn>18</mn><mo>%</mo></math> of the molecules that survive the RSC. This process paves the way to increase molecular coherence times in optical tweezers for robust quantum computation and simulation applications.\",\"PeriodicalId\":20161,\"journal\":{\"name\":\"Physical Review X\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":11.6000,\"publicationDate\":\"2024-07-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Physical Review X\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1103/physrevx.14.031002\",\"RegionNum\":1,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"PHYSICS, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical Review X","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1103/physrevx.14.031002","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
Raman Sideband Cooling of Molecules in an Optical Tweezer Array to the 3D Motional Ground State
Ultracold polar molecules are promising for quantum information processing and searches for physics beyond the standard model. Laser cooling to ultracold temperatures is an established technique for trapped diatomic and triatomic molecules. Further cooling of the molecules to near the motional ground state is crucial for reducing various dephasings in quantum and precision applications. In this work, we demonstrate Raman sideband cooling (RSC) of CaF molecules in optical tweezers to near their motional ground state, with average motional occupation quantum numbers of , (radial directions), and (axial direction), and a 3-D motional-ground-state probability of of the molecules that survive the RSC. This process paves the way to increase molecular coherence times in optical tweezers for robust quantum computation and simulation applications.
期刊介绍:
Physical Review X (PRX) stands as an exclusively online, fully open-access journal, emphasizing innovation, quality, and enduring impact in the scientific content it disseminates. Devoted to showcasing a curated selection of papers from pure, applied, and interdisciplinary physics, PRX aims to feature work with the potential to shape current and future research while leaving a lasting and profound impact in their respective fields. Encompassing the entire spectrum of physics subject areas, PRX places a special focus on groundbreaking interdisciplinary research with broad-reaching influence.