5,585 reputation
1733
bio website sites.google.com/site/…
location Cambridge, MA
age 27
visits member for 3 years, 4 months
seen 8 hours ago

Physics Graduate student at Harvard University.


8h
comment How M theory or String theory explains fundamental forces and Quantum mechanical phenomena?
This is too broad a question. M theory explains all of those in much the same way that standard particle physics does. If you know that, then there is practically nothing else to say here.
1d
reviewed Close correlation functions
1d
reviewed Leave Open How far do the propagation paths in QED go?
1d
reviewed Close How can we construct wavefunction using given density matrix?
1d
comment Do contractions with Dirac matrices involve a metric?
You're almost correct. The partial derivative $\partial_\mu$ is also elevated to a covariant derivative acting on spinors. In particular $\nabla_\mu \psi_a = \partial_\mu \psi_a - \omega_\mu{}_a{}^b \psi_b$ where $\omega$ is the spin-connection. Also, "half a metric" is misleading. It's more like the "square root of the metric".
Aug
22
reviewed Approve Quantifying Simulaneity in the Twins Paradox
Aug
22
reviewed Leave Open How to interpret physical quantities in a superposition state?
Aug
22
reviewed Close Differences in measurement between quantum physics and classical physics?
Aug
22
reviewed Close Time is what keeps everything from appearing at once
Aug
22
reviewed Close Does acceleration of time explain gravity (rather than the other way round)?
Aug
22
reviewed Close Wavefront explain
Aug
22
reviewed Close Wick's theorem: Classical Version. Derivation question and what happens with odd moments?
Aug
22
reviewed Close Question about Sharvin resistance
Aug
22
reviewed Close Local Gauge Invariance and Masslessness
Aug
22
reviewed Close Absolute time as a common basis of quantum gravity?
Aug
22
reviewed Close Does a charged particle propagating in free space have a 'self-energy' like term due to it’s interaction with the fluctuations of the quantum vacuum?
Aug
22
reviewed Close contactless force compatibility
Aug
22
reviewed Close Is it possible to vary the value of G and the masses of celestial bodies leaving equal G*M?
Aug
22
reviewed Close Euclidean geometry in non-inertial frame
Aug
22
reviewed Close Can we say that gravity(indirectly) is responsible for motion of electrons around nucleus?