Home | Rajesh Kumar

Supersymmetry from First Principles: How Bosons and Fermions Are Related

The familiar sentence

Spherical harmonics are not merely special functions used to solve the hydrogen atom. They are the natural normal modes of a scalar field on t...

The covariance matrix is one of the most useful compressed descriptions of a continuous-variable quantum state. It records the widths and corr...

The Wigner function is sometimes introduced merely as a way to draw a quantum state in phase space. That description is incomplete. When it is...

A daily reference guide to Jharkhand university officers, authorities, committees, appointments, finance, grievances, colleges, and the State ...

Quantum mutual information answers a concrete question: how much information is shared by two chosen subsystems? For continuous-variable syste...

The preceding chapters produced exact initial states and exact derivatives at the quench. A derivative is not a trajectory. To investigate osc...

Covariances describe widths and pairwise correlations. They do not describe an entire non-Gaussian wavefunction. A state can therefore have no...

The angular quench creates dynamics in a state that was stationary before $t=0$. The first experimentally accessible question is therefore loc...

A quantum quench is a rapid, controlled change of a Hamiltonian parameter. The state is continuous through an ideal sudden switch, but from th...