Black Holes and Quantum Cosmology

黑洞和量子宇宙学

基本信息

  • 批准号:
    RGPIN-2019-04724
  • 负责人:
  • 金额:
    $ 3.64万
  • 依托单位:
  • 依托单位国家:
    加拿大
  • 项目类别:
    Discovery Grants Program - Individual
  • 财政年份:
    2021
  • 资助国家:
    加拿大
  • 起止时间:
    2021-01-01 至 2022-12-31
  • 项目状态:
    已结题

项目摘要

I propose to continue research in theoretical physics, primarily gravitational physics and cosmology, particularly focusing on the quantum aspects. One main focus is on quantum cosmology, applying quantum theory to the universe as a whole. One of the deepest problems in theoretical cosmology is the measure problem, how to obtain testable probabilities for observations by finite observers in a quantum model for the universe. Traditionally in quantum theory one uses what is called Born's rule, which says that probabilities are given by the squares of what in quantum theory are called amplitudes. However, I have discovered that Born's rule does not work in a universe large enough for there to be two observers so nearly identical that their observations do not distinguish them. I have proposed a new framework for converting quantum amplitudes to the probabilities of observations, but there are are unknown details. I would like to find better models for these details. A related issue in quantum cosmology is what is called the quantum state of the universe, which is a complete description of the universe in quantum theory, up to the question of how to determine observational probabilities from it. Hartle and Hawking have made the brilliant proposal of what they called the no-boundary wavefunction (NBWF). However, Susskind raised an objection to this model, which I fleshed out, that when empty space anti-gravitates, as it is observed to do in our universe (so that distant galaxies are accelerating apart), then the NBWF appears to be dominated by universes that are empty, obviously contrary to what we observe. Nevertheless, there is presently some controversy about how probabilities should be calculated in the NBWF, so I plan to examine this further to see whether it can be made consistent with observations, and, if not, what other proposals for the quantum state of the universe (and for the rules for getting the observational probabilities from the quantum state) could be consistent with observations. Another main focus of my continuing research is on black hole thermodynamics and Hawking evaporation, particularly for the information puzzle of what happens to the information that falls into a black hole. This puzzle was heightened by the argument of Almheiri, Marolf, Polchinski, and Sully, which suggests that black holes older than the so-called Page time are surrounded by what they call a `firewall,' which would immediately destroy anything falling in. I have written several papers critiquing this argument, and my graduate student Kento Osuga and I have built a toy model for getting the information out. I plan to work on improvements of this toy model. Smaller projects that I plan to pursue include better approximations for the geometry of an evaporating black hole, the time evolution and minimum temperature of a black hole of enormous electric charge, and the probabilities for the production of electron-positron pairs by colliding laser beams.
我打算继续研究理论物理,主要是引力物理和宇宙学,特别是量子方面。一个主要的焦点是量子宇宙学,将量子理论应用于整个宇宙。理论宇宙学中最深层次的问题之一是测量问题,即如何在宇宙的量子模型中获得有限观测者观测的可检验概率。传统上,在量子理论中,人们使用所谓的玻恩规则,它说概率是由量子理论中所谓的振幅的平方给出的。然而,我已经发现,玻恩定则在一个大到足以有两个观察者的宇宙中不起作用,因为两个观察者几乎完全相同,以至于他们的观察无法区分他们。我已经提出了一个新的框架,用于将量子振幅转换为观测的概率,但还有一些未知的细节。我想为这些细节找到更好的模型。量子宇宙学中的一个相关问题是所谓的宇宙量子态,这是量子理论中对宇宙的完整描述,直到如何确定观测概率的问题。哈特尔和霍金提出了他们所谓的无边界波函数(NBWF)的辉煌提议。然而,Susskind对这个模型提出了一个反对意见,我充实了这个模型,当空的空间反引力时,就像在我们的宇宙中观察到的那样(因此遥远的星系正在加速分离),那么NBWF似乎被空的宇宙所主导,显然与我们观察到的相反。尽管如此,目前关于如何在NBWF中计算概率存在一些争议,所以我计划进一步研究它,看看它是否可以与观测相一致,如果不能,还有什么关于宇宙量子态的建议(以及从量子态获得观测概率的规则)可以与观测相一致。我继续研究的另一个主要焦点是黑洞热力学和霍金蒸发,特别是对于信息之谜,即福尔斯落入黑洞的信息会发生什么。这个谜团被阿尔姆黑里、马罗夫、波尔钦斯基和萨利的论证所加深,他们认为比所谓的佩奇时间更老的黑洞被他们所谓的“防火墙”所包围,它会立即摧毁掉进去的任何东西。我写了几篇论文来批评这个论点,我的研究生大菅健人和我建立了一个玩具模型来获取信息。我打算改进这个玩具模型。我计划从事的较小的项目包括蒸发黑洞几何形状的更好近似,巨大电荷黑洞的时间演化和最低温度,以及通过碰撞激光束产生电子-正电子对的概率。

项目成果

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Page, Don其他文献

Page, Don的其他文献

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{{ truncateString('Page, Don', 18)}}的其他基金

Black Holes and Quantum Cosmology
黑洞和量子宇宙学
  • 批准号:
    RGPIN-2019-04724
  • 财政年份:
    2022
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Black Holes and Quantum Cosmology
黑洞和量子宇宙学
  • 批准号:
    RGPIN-2019-04724
  • 财政年份:
    2020
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Black Holes and Quantum Cosmology
黑洞和量子宇宙学
  • 批准号:
    RGPIN-2019-04724
  • 财政年份:
    2019
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Black Holes and Quantum Cosmology
黑洞和量子宇宙学
  • 批准号:
    RGPIN-2014-06260
  • 财政年份:
    2018
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Black Holes and Quantum Cosmology
黑洞和量子宇宙学
  • 批准号:
    RGPIN-2014-06260
  • 财政年份:
    2017
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Black Holes and Quantum Cosmology
黑洞和量子宇宙学
  • 批准号:
    RGPIN-2014-06260
  • 财政年份:
    2016
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Black Holes and Quantum Cosmology
黑洞和量子宇宙学
  • 批准号:
    RGPIN-2014-06260
  • 财政年份:
    2015
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Black Holes and Quantum Cosmology
黑洞和量子宇宙学
  • 批准号:
    RGPIN-2014-06260
  • 财政年份:
    2014
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Gravitational theory
引力理论
  • 批准号:
    109609-2009
  • 财政年份:
    2013
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Gravitational theory
引力理论
  • 批准号:
    109609-2009
  • 财政年份:
    2012
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual

相似海外基金

HUMBLE: Holography and Quantum Black Holes
谦逊:全息术和量子黑洞
  • 批准号:
    EP/Y027604/1
  • 财政年份:
    2024
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Fellowship
Quantum aspects of black holes from low-dimensional quantum gravity models
低维量子引力模型中黑洞的量子方面
  • 批准号:
    23K13105
  • 财政年份:
    2023
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Grant-in-Aid for Early-Career Scientists
Investigations of Quantum Effects Related to Black Holes and the Early Universe
与黑洞和早期宇宙相关的量子效应的研究
  • 批准号:
    2309186
  • 财政年份:
    2023
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Continuing Grant
Hints at a Quantum Spacetime: Holography vs. Entanglement Harvesting, and Holographic Black Holes Thermodynamics
量子时空的提示:全息与纠缠收获,以及全息黑洞热力学
  • 批准号:
    555706-2020
  • 财政年份:
    2022
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Vanier Canada Graduate Scholarship Tri-Council - Doctoral 3 years
Probing the quantum gravitational structure of spacetime via black holes and gravitational waves
通过黑洞和引力波探测时空的量子引力结构
  • 批准号:
    RGPIN-2021-03644
  • 财政年份:
    2022
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Quantum theory, black holes and quantum gravity
量子理论、黑洞和量子引力
  • 批准号:
    RGPIN-2018-04090
  • 财政年份:
    2022
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Black Holes and Quantum Cosmology
黑洞和量子宇宙学
  • 批准号:
    RGPIN-2019-04724
  • 财政年份:
    2022
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Black holes and cosmology in quantum gravity
量子引力中的黑洞和宇宙学
  • 批准号:
    RGPIN-2017-04317
  • 财政年份:
    2022
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Quantum theory, black holes and quantum gravity
量子理论、黑洞和量子引力
  • 批准号:
    RGPIN-2018-04090
  • 财政年份:
    2021
  • 资助金额:
    $ 3.64万
  • 项目类别:
    Discovery Grants Program - Individual
Numerics for quantum gravity effects in black holes
黑洞中量子引力效应的数值
  • 批准号:
    561804-2021
  • 财政年份:
    2021
  • 资助金额:
    $ 3.64万
  • 项目类别:
    University Undergraduate Student Research Awards
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