Angom
D. K. Singh Professor Tel: +91 (79) 2631 4463;Fax: +91 (79) 2630 1502 e-mail: angom AT prl.res.in |

**Current Research Interests **

My
research
interests are on theoretical matters related to atoms.
These span a wide range of very exciting and challenging research
areas. Be
it the nature of fundamental interactions or the physics of galaxies or
phenomena in condensed matter physics or quantum chaos or precision
time keeping, it is of immense value to know atoms to fine detail.

It is interesting and amazing to study how atoms respond to
external fields. Depending on the nature of the field and how it is
applied, one can have a peek at the inner workings of an atom or
collection of atoms. Some of the revelations could be far reaching and
of fundamental importance.

My current research interests are:

- Parity and time reversal violation in atoms
- Atomic Parity nonconservation
- Quantum chaos and complexity in heavy atoms
- Condensates of dilute atomic gases
- Coupled-cluster based methods for atomic many-body calculations
- QED effects in heavy atoms
- Vortex dynamics in superfluids
- Finite temperature effects in Bose-Einstein condensates

In the near future I shall continue to work on research projects related to the above topics. As long term undertaking, I have initiated research work on the following topics:

- Quantum phase transitions
- Quenching in quantum liquids

- Quantum turbulence
- Time-dependent relativistic coupled-cluster theory

- Arko Roy and D. Angom,

Thermal suppression of phase separation in condensate mixtures,

Phys. Rev. A 92, 011601(R) (2015). 5pp - S. Chattopadhyay, B. K. Mani, and D. Angom,

Triple excitations in perturbed relativistic coupled-cluster theory and electric dipole polarizability of group-IIB elements,

Phys. Rev. A 91, 052504 (2015). 14pp

- K. Suthar, Arko Roy, and D. Angom,

Fluctuation-driven topological transition of binary condensates in optical lattices ,

Phys. Rev. A 91, 043615 (2015). 9pp

- Arko Roy, S. Gautam and D. Angom,

Evolution of Goldstone mode in binary condensate mixtures,

Eur. Phys. J. Special Topics 90, 571 (2015). 5pp

- Arko Roy, and D. Angom,

Fluctuation- and interaction-induced instability of dark solitons in single and binary condensates,

Phys. Rev. A 90, 023612 (2014). 9pp

- K. Suthar, Arko Roy, and D. Angom,

Acoustic radiation from vortex-barrier interaction in atomic Bose-Einstein condensate,

J. Phys. B 47, 135301 (2014). 10pp

- S. Chattopadhyay, B. K. Mani, and D. Angom

Electric dipole polarizability of alkaline-earth-metal atoms from perturbed relativistic coupled-cluster theory with triples,

Phys. Rev. A 89, 022506 (2014). 12pp

- Arko Roy, S. Gautam, and D. Angom

Goldstone modes and bifurcations in phase-separated binary condensates at finite temperature,

Phys. Rev. A 89, 013617 (2014). 7pp

- S. Gautam, K. Suthar, and D. Angom

Vortex reconnections between coreless vortices in binary condensates,

Ed by Amita Das and A. Surjalal Sharma, AIP Conf. Proc. 1582, 46 (2014). 9pp

- S. Chattopadhyay, B. K. Mani, and D. Angom,

Electric dipole polarizabilities of doubly ionized alkaline-earth-metal ions from perturbed relativistic coupled-cluster theory,

Phys. Rev. A 87, 062504 (2013). 9pp