# Excitation spectra of fragmented condensates by linear response: General theory and application to a condensate in a double-well potential

@article{Grond2012ExcitationSO, title={Excitation spectra of fragmented condensates by linear response: General theory and application to a condensate in a double-well potential}, author={J. Grond and A. I. Streltsov and O. E. Alon and L. Cederbaum}, journal={Physical Review A}, year={2012}, volume={86}, pages={063607} }

Linear response of simple (i.e., condensed) Bose-Einstein condensates is known to lead to the Bogoliubov- de Gennes equations. Here, we derive linear response for fragmented Bose-Einstein condensates, i.e., for the case where the many-body wave function is not a product of one, but of several single-particle states (orbitals). Our approach is based on the number-conserving variational time-dependent mean field theory [O. E. Alon, A. I. Streltsov, and L. S. Cederbaum, Phys. Lett. A 362, 453… CONTINUE READING

10 Citations

Excitation spectra of many-body systems by linear response: General theory and applications to trapped condensates

- Physics
- 2013

20

Many-body excitation spectra of trapped bosons with general interaction by linear response

- Physics
- 2015

7

A unified ab initio approach to the correlated quantum dynamics of ultracold fermionic and bosonic mixtures.

- Physics, Medicine
- 2017

38

Bosonic quantum dynamics following a linear interaction quench in finite optical lattices of unit filling

- Physics, Chemistry
- 2017

9

Numerically-Exact Schrödinger Dynamics of Closed and Open Many-Boson Systems with the MCTDHB Package

- Computer Science
- 2013

2

#### References

##### Publications referenced by this paper.

SHOWING 1-10 OF 157 REFERENCES

Multiconfigurational time-dependent Hartree method for bosons: Many-body dynamics of bosonic systems

- Physics
- 2008

190

Role of excited states in the splitting of a trapped interacting Bose-Einstein condensate by a time-dependent barrier.

- Physics, Medicine
- 2007

124

Multiconfigurational Hartree-Fock theory for identical bosons in a double well (19 pages)

- Physics
- 2005

26

Low Energy Excitations of a Bose-Einstein Condensate: A Time-Dependent Variational Analysis.

- Physics, Medicine
- 1996

207