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The 'Kick' of Vacuum Fluctuations.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The 'Kick' of Vacuum Fluctuations./
作者:	Huang, Haiyun.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	188 p.
附註:	Source: Dissertations Abstracts International, Volume: 83-04, Section: B.
Contained By:	Dissertations Abstracts International83-04B.
標題:	Theoretical physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28716606
ISBN:	9798460478231

The 'Kick' of Vacuum Fluctuations.
Huang, Haiyun.

The 'Kick' of Vacuum Fluctuations. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 188 p.

Source: Dissertations Abstracts International, Volume: 83-04, Section: B.

Thesis (Ph.D.)--Tufts University, 2021.

This item must not be sold to any third party vendors.

The expectation value of a quantum operator at a specific space-time point is not well defined because of high frequency contributions. We need to smear it over a temporal or space-time region before we can read out its behavior in the vacuum. We interpret this behavior as quantum fluctuations, which are characterized by their magnitudes and durations.In this thesis, we first review linear operators averaged over time, whose behavior can be described by Gaussian distributions, with the characteristic magnitude inversely proportional to the square of the duration. This property is applied to the construction of a heuristic picture for a quantum tunneling process enhanced by electric field fluctuation.Quadratic operators averaged over time are then studied. The asymptotic behavior of the probability distribution indicates that there might exist very large fluctuations which were underestimated. We explore the possibility of increasing quantum tunneling rate when radiation pressure fluctuations are considered. Particularly, a nuclear fusion case is studied to discuss a possibly observable effect.At last, we examine both linear and quadratic operators averaged within space-time regions. It turns out that the functional forms for their probability distributions are basically the same. The main difference is the additional spatial averaging tends to decrease the probability for the large fluctuations. When discussing their effects in the context of vacuum decay problem, the results enrich our knowledge about possible vacuum decay mechanisms.

ISBN: 9798460478231Subjects--Topical Terms:

2144760
Theoretical physics.
Subjects--Index Terms:

False vacuum decay

The 'Kick' of Vacuum Fluctuations.
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245 1 4 $a The 'Kick' of Vacuum Fluctuations.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2021
300 $a 188 p.
500 $a Source: Dissertations Abstracts International, Volume: 83-04, Section: B.
500 $a Advisor: Ford, Lawrence H.
502 $a Thesis (Ph.D.)--Tufts University, 2021.
506 $a This item must not be sold to any third party vendors.
520 $a The expectation value of a quantum operator at a specific space-time point is not well defined because of high frequency contributions. We need to smear it over a temporal or space-time region before we can read out its behavior in the vacuum. We interpret this behavior as quantum fluctuations, which are characterized by their magnitudes and durations.In this thesis, we first review linear operators averaged over time, whose behavior can be described by Gaussian distributions, with the characteristic magnitude inversely proportional to the square of the duration. This property is applied to the construction of a heuristic picture for a quantum tunneling process enhanced by electric field fluctuation.Quadratic operators averaged over time are then studied. The asymptotic behavior of the probability distribution indicates that there might exist very large fluctuations which were underestimated. We explore the possibility of increasing quantum tunneling rate when radiation pressure fluctuations are considered. Particularly, a nuclear fusion case is studied to discuss a possibly observable effect.At last, we examine both linear and quadratic operators averaged within space-time regions. It turns out that the functional forms for their probability distributions are basically the same. The main difference is the additional spatial averaging tends to decrease the probability for the large fluctuations. When discussing their effects in the context of vacuum decay problem, the results enrich our knowledge about possible vacuum decay mechanisms.
590 $a School code: 0234.
650 4 $a Theoretical physics. $3 2144760
650 4 $a Astrophysics. $3 535904
650 4 $a Quantum physics. $3 726746
653 $a False vacuum decay
653 $a Quantum fluctuation
653 $a Quantum tunneling
653 $a Space-time averaging
653 $a Stress tensor fluctuation
653 $a Vacuum fluctuation
690 $a 0753
690 $a 0599
690 $a 0596
710 2 $a Tufts University. $b Physics. $3 1023772
773 0 $t Dissertations Abstracts International $g 83-04B.
790 $a 0234
791 $a Ph.D.
792 $a 2021
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28716606