Search for Gravity-Like Forces at Sub-100 microns Scale
Search for Gravity-Like Forces at Sub-100 microns Scale
批准号:
0554170
负责人:
Aharon Kapitulnik
金额:
$65.04万
依托单位:
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
2006
资助国家:
美国
项目状态:
已结题
起止时间:
2006-04-01 至 2010-03-31
中文摘要
该奖项支持一项实验项目,该项目旨在探测超出基本粒子相互作用标准模型的物理理论所预测的距离为25微米的牛顿引力偏差。一个低温探测器已经建成,用来测量这些距离下的微小力。力传感器是一个微机械硅悬臂。一个金色的测试块被粘在悬臂的末端。金条和硅条的交替模式在测试质量以下振荡;测试质量与运动驱动质量的变化引力场之间的耦合激发了悬臂梁的共振。用光纤干涉仪测量悬臂梁的运动,并由此推导出质量之间的力。由于驱动质量的几何特性,随着驱动质量纵向平衡位置的变化,任何引力都会表现出明显的周期性。将测量到的力与有限元分析预测的力进行比较,得出了新的类引力的界限,这可能标志着新的物理学。虽然标准模型成功地统一了电磁、强相互作用和弱相互作用,但它忽略了引力。这给基础物理学带来了一个巨大的谜团:为什么即使是最微弱的亚原子力,即弱力,也比引力强得多?试图回答这个问题的现代理论预测,牛顿定律将在更长的尺度上修正,达到1毫米。本实验中使用的技术是微型制造设备的前沿技术。
英文摘要
This award supports an experimental program to probe deviations from Newtonian gravity at distances on the order of 25 microns as predicted by theories of physics beyond the Standard Model of fundamental particle interactions. A low temperature probe has been built to measure tiny forces expected at these distances. The force sensor is a micromachined silicon cantilever. A gold test mass is glued to the end of the cantilever. An alternating pattern of gold and silicon bars is oscillated below the test mass; the coupling between the test mass and the varying gravitational field of the moving drive mass excites the cantilever on resonance. A fiber interferometer measures the cantilever motion and from this measurement, the force between the masses is deduced. Due to the geometry of the drive mass, as the longitudinal equilibrium position of the drive mass is varied, any gravitational force will show a distinct periodicity. Comparison of the measured force to predictions from finite element analysis yields bounds on new gravity-like forces which could signal new physics.While the Standard Model successfully unifies the electromagnetic, the strong and the weak interactions, it ignores gravity. This poses a great mystery in fundamental physics: why is even this most feeble subatomic force, i.e. the weak force, so much stronger than gravity? Modern theories that attempt to answer this question predict modifications to Newton's law at much longer length scales, up to 1 millimeter. The technology used in this experiment is at the cutting edge of micro-fabricated devices.
期刊论文(0)
专著(0)
科研奖励(0)
会议论文
Superconductor-(Metal)-Insulator Transitions: Understanding the Emergence of Metallic States, A Continuation Proposal
-
批准号:2307132
-
项目类别:Continuing Grant
-
资助金额:$72.76万
-
财政年份:2023
-
负责人:Aharon Kapitulnik
-
依托单位:
Collaborative Research: Axion Resonant InterAction Detection Experiment (ARIADNE) - a Renewal Proposal
-
批准号:2110944
-
项目类别:Continuing Grant
-
资助金额:$37.8万
-
财政年份:2021
-
负责人:Aharon Kapitulnik
-
依托单位:
Superconductor-(Metal)-Insulator Transitions: Understanding the Emergence of Anomalous Metallic States
-
批准号:1808385
-
项目类别:Continuing Grant
-
资助金额:$64.85万
-
财政年份:2018
-
负责人:Aharon Kapitulnik
-
依托单位:
Collaborative Research: Axion Resonant InterAction DetectioN Experiment (ARIADNE) - a Continuation Proposal
-
批准号:1806395
-
项目类别:Continuing Grant
-
资助金额:$48.0万
-
财政年份:2018
-
负责人:Aharon Kapitulnik
-
依托单位:
Collaborative Research: Axion Resonant InterAction DetectioN Experiment (ARIADNE)
-
批准号:1510484
-
项目类别:Standard Grant
-
资助金额:$12.0万
-
财政年份:2016
-
负责人:Aharon Kapitulnik
-
依托单位:
Search for Deviations from Newtonian Gravity at Micron Scale (A Continuation Proposal)
-
批准号:1205236
-
项目类别:Continuing Grant
-
资助金额:$66.0万
-
财政年份:2012
-
负责人:Aharon Kapitulnik
-
依托单位:
Exploring Quantum Effects in Two-Dimensional Multilayered Superconductors
-
批准号:1104547
-
项目类别:Standard Grant
-
资助金额:$5.0万
-
财政年份:2011
-
负责人:Aharon Kapitulnik
-
依托单位:
Search for Deviations from Newtonian Gravity at Micron Scale (a continuation proposal)
-
批准号:0854678
-
项目类别:Continuing Grant
-
资助金额:$76.41万
-
财政年份:2009
-
负责人:Aharon Kapitulnik
-
依托单位:
Superconductivity and Proximity Effect in Two-Dimensional Films and Multilayers
-
批准号:0803958
-
项目类别:Continuing Grant
-
资助金额:$44.0万
-
财政年份:2008
-
负责人:Aharon Kapitulnik
-
依托单位:
Superconductors, Insulators, Metals and Quantum Phase Transitions in Two-Dimensional Films
-
批准号:0406339
-
项目类别:Continuing Grant
-
资助金额:$42.5万
-
财政年份:2004
-
负责人:Aharon Kapitulnik
-
依托单位:
Measurements of Gravity-Like Forces at Small Distances
-
批准号:0244932
-
项目类别:Continuing Grant
-
资助金额:$50.16万
-
财政年份:2003
-
负责人:Aharon Kapitulnik
-
依托单位:
Quantum Phase Transitions and Effects of Dissipation in Low-Dimensional Superconductors
-
批准号:0119027
-
项目类别:Continuing Grant
-
资助金额:$39.0万
-
财政年份:2001
-
负责人:Aharon Kapitulnik
-
依托单位:
Studies of Two-Dimensional Superconductors and Multilayers in Magnetic Fields
-
批准号:9800663
-
项目类别:Continuing Grant
-
资助金额:$38.37万
-
财政年份:1998
-
负责人:Aharon Kapitulnik
-
依托单位:
Acquisition of a Dilution Refrigerator System for Materials Research at the "KGB" Group at Stanford University
-
批准号:9625789
-
项目类别:Standard Grant
-
资助金额:$16.37万
-
财政年份:1996
-
负责人:Aharon Kapitulnik
-
依托单位:
Studies of Two-Dimensional Superconductors and Multilayers in Magnetic Fields
-
批准号:9508419
-
项目类别:Continuing Grant
-
资助金额:$23.05万
-
财政年份:1995
-
负责人:Aharon Kapitulnik
-
依托单位:
Materials Research Science and Engineering Center
-
批准号:9400372
-
项目类别:Cooperative Agreement
-
资助金额:$1168.0万
-
财政年份:1994
-
负责人:Aharon Kapitulnik
-
依托单位:
Presidential Young Investigator Award
-
批准号:8657658
-
项目类别:Continuing Grant
-
资助金额:$28.45万
-
财政年份:1987
-
负责人:Aharon Kapitulnik
-
依托单位:
Superconductivity in Strongly Disordered Systems (Materials Research)
-
批准号:8519753
-
项目类别:Continuing Grant
-
资助金额:$19.82万
-
财政年份:1986
-
负责人:Aharon Kapitulnik
-
依托单位:
国内基金
海外基金
2019年度国际理论物理中心-ICTP School on Geometry and Gravity (smr 3311)
-
批准号:11981240404
-
项目类别:国际(地区)合作与交流项目
-
资助金额:1.5万元
-
批准年份:2019
-
负责人:季丹丹
-
依托单位: