# Minkyu Park

## 17 Added | 3 Magazines | 11 Likes | 2 Following | @BeyondSM | Keep up with Minkyu Park on Flipboard, a place to see the stories, photos, and updates that matter to you. Flipboard creates a personalized magazine full of everything, from world news to life’s great moments. Download Flipboard for free and search for “Minkyu Park”

### The Real Reasons Quantum Entanglement Doesn't Allow Faster-Than-Light Communication

My colleague-in-blogging Ethan Siegel does a regular reader-request feature, and this week’s edition drifts into my territory, answering a question about using quantum entanglement for faster-than-light communication. As I jokingly said on Twitter, Ethan’s answer is pretty good for an astronomer, …

Quantum Mechanics

### The Question That Could Unite Quantum Theory With General Relativity:

Is Spacetime Countable?<p>Current thinking about quantum gravity assumes that spacetime exists in countable lumps, like grains of sand. That can’t be …

### What do physicists do after several post-PhD years in academia?

I am curious to hear your stories / opinions on what do physicists do after many post-PhD years in academia?<p>A small fraction may get more-or-less …

Employment

### What happens to objects pulled in by black hole?

What happens to the particles/elements/objects that sink into the gravitational pull and ultimately go to the interior part of a black hole? If, …

Physics

### What is information?

We're all familiar with basic tenets such as "information cannot be transmitted faster than light" and ideas such as information conservation in …

Quantum Mechanics

### [맥 기초] 현재 작업 중인 파일∙폴더를 다른 프로그램에서 신속 간편하게 열어보자! 프록시 아이콘을 활용하는 5가지 방법

한 가지 가정을 해보겠습니다.<p>현재 작업하고 있는 문서를 다른 프로그램에서 연결해서 열어보려고 할 때 주로 어떤 방법을 사용하십니까? 일단 문서를 저장하고 파인더에서 해당 파일을 찾은 다음 다른 프로그램에 떨궈 넣거나 불러오기 메뉴를 사용하시지 않으십니까?<p>다른 가정을 …

### Information or Matter or Energy

<b>Which one is the most fundamental of the universe? What it is made of?</b><p>Physicists are searching for unique and fundamental form. The question is , …

Quantum Mechanics

### 더 나은 읽기 환경을 위한 사파리의 읽기 도구와 CustomReader

들어가며<p>인터넷 상에서 광고를 보는 것이 너무나 당연한 세상에 살고 있습니다. 광고 수익을 통해 뉴스 사이트와 블로그는 운영에 필요한 재원을 조달할 수 있고 콘텐츠 생산에 지속적으로 매진할 수 있습니다. 또 이런 사이트들로부터 정보와 지식을 얻는 방문자도 이제 큰 …

### How to learn physics effectively and efficiently

How do you effectively study physics? How does one read a physics book instead or just staring at it for hours?<p>(Apologies in advance if the question …

Learning

### Decennial

Almost forgot again — the leap-year thing always gets me. But I’ve now officially been blogging for ten years. Over 2,000 posts, generating over …

### Eta function and the sum of positive integers

In the previous articles, I described various calculations of the sum of positive integers and discussed the context in which it is right to say that …

### Affine connection notation

Can ${g}^{\mu\sigma}{\Gamma}^{\rho}_{\sigma\nu}$ be written as ${\Gamma}^{\mu\rho}_{\nu}$? If so how come this symbol never appears in any GR …

Mathematics

### Is the Lorentz group compact (and if not, is U(1)?)

A common statement in any quantum field theory text is that only compact groups have finite-dimensional representations, and that the Lorentz group …

Mathematics

### Kähler and complex manifolds

I was wondering if anyone knows any good references concerning Kähler manifolds and complex manifolds? I am studying supergravity theories and for …

Mathematics

### How to get a $\mathcal{N}=2$ SuperYang-Mills Lagrangian from a quiver

How can one write down the $\mathcal{N}=2$ SuperYang-Mills Lagrangian given a quiver graph?<p>For concreteness consider the quiver<p>$$(2)-(4)-[6]$$<p>where …

Software Development

### Quivers in String Theory

Why do a physicist, particularly a string theorist care about Quivers ?<p>Essentially what I'm interested to know is the origin of quivers in string …

Quantum Mechanics

### Book recommendations

Every once in a while, we get a question asking for a book or other educational reference on a particular topic at a particular level. This is a …

Quantum Mechanics