Quantum Physics: 

Quantum Foundations

Quantum Entanglement

Hybrid Quantum Systems

BEC Quantum Systems


image1

Dr. Mandip Singh

Profession: Physicist (Asst. Professor of Physics),  Indian Institute of Science Education and Research Mohali, India.

Principal investigator of research project from QuEST scheme. Research group leader.


Research Interests:  Quantum Physics:   Quantum entanglement,  Hybrid quantum systems, Foundations of quantum physics, BEC & quantum technology experiments and connection of relativity with quantum physics. 


Selected Research

image2

Macroscopic quantum entanglement

Fields are quantum of nature and particles are energy excitation of a  field. Quantum superposition of magnetic field can produce interesting quantum states of interacting BEC. One such quantum state is a macroscopic  entanglement of path of a single Bose Einstein condensate. Quantum magnetic field can produce macroscopic quantum entanglement  of BEC. 

Further details: Mandip Singh, Phys. Rev. A. 95, 043620, (2017)

image3

Macroscopic quantum system

  Displacement of a close loop superconducting cantilever is coupled with the net magnetic flux linked to the loop. Its ground state has features of quantum entanglement. Coupling constant of cantilever displacement with the net magnetic flux depends on the external magnetic field. In this way, coupling can be controlled externally and  quantum entanglement of macroscopic quantum variables can be produced.  Mandip Singh, Phys. Letts A. 370, 2001-2006 (2015).

Phase space Imaging Experiment

image4

3D Tomographic imaging of a phase space pattern

Patterns in phase space cannot be imaged with a lens and eye. This research is about imaging of a pattern localised in a phase space. A part of the experiment on a three-dimensional tomographic imaging of a phase space pattern is shown on left. 

For details: Phys. Rev. A, 98, 053828 (2018).

image5

Concept

Concept of a 3D tomographic imaging of a pattern in phase space  (a). 

(d) velocity selective hole-burning and 

(c) a spatial domain image. 

image6

Phase Space Tomographic Imaging

 Schematic  diagram of experiment.

phy-edu

image7

Experiment of diffraction of laser beam from moving sharp edges is featured on the cover page of American Journal of Physics, June 2018. 

Diffraction effects in mechanically chopped laser pulses. S. Gambhir and M. Singh, 86, 406, (2018).

ads

Nonlinearity of PN junction diode.

This experiment shows all orders of nonlinearity of a PN junction diode.  Harmonic generation, sum difference frequency generation, frequency comb  generation up to the twentieth harmonic by a single PN junction. (IAPT Physics Education,Vol 32, 2, Apr-Jun 2018, ISSN: 0970-5953.)

Frequency comb generation up to twentieth harmonic of the fundamental driving voltage.

Frequency comb generation by a PN junction diode

A frequency comb generated by using nonlinearity of a PN junction diode. Highest frequency is the twentieth harmonic of the driving voltage. Published in IAPT physics education, Apr-Jun 2018.

Publications

  • Three-dimensional imaging of a pattern localized in a phase space. Mandip Singh and Samridhi Gambhir, Phys. Rev. A, 98, 053828 (2018).
  • Featured on cover page of journal, Diffraction effects in mechanically chopped laser pulses. S. Gambhir and M. Singh, Am. J. Phys, 86, 406, (2018).
  • Intrinsic nonlinearity of a PN-junction diode and high harmonic generation. Samridhi Gambhir, Arvind and Mandip Singh, IAPT Physics Education,Vol 32, 2, Apr-Jun 2018, ISSN: 0970-5953.
  • Quantum Stern-Gerlach experiment and path entanglement of a Bose-Einstein condensation. Mandip Singh, Phys. Rev. A. 95, 043620, (2017).
  • Macroscopic quantum oscillator based on a flux-qubit. Mandip Singh, Phys. Letts. A., 379, 2001-2006 (2015).
  • A Bose-Einstein condensation of metastable helium for quantum correlation experiments. M. Keller, M. Kotyrba, F. Leupold, M. Singh, M. Ebner and A. Zeilinger. Phys. Rev. A. 90, 063607 (2014).
  • Einstein-Podolsky-Rosen correlations from colliding Bose-Einstein condensates. J. Kofler, M. Singh. M. Ebner, M. Keller, M. Kotyrba and A. Zeilinger. Phys. Rev. A. 86, 032115, (2012).
  • Effect of temperature and projection velocity on the reflection of ultracold atoms from a periodic 1D corrugated magnetic potential. Mandip Singh and Peter Hannaford, Phys. Rev. A. 82, 013416, 2010.
  • Dynamics of reflection of ultracold atoms from a periodic one-dimensional magnetic lattice potential. Mandip Singh, R. McLean, A. Sidorov and P. Hannaford, Phys. Rev. A. 79, 053407, 2009.
  • Macroscopic entanglement between a Bose-Einstein condensate and a superconducting loop. Mandip Singh, Optics Express, 17, 2600-10, 2009.
  • One dimensional lattice of permanent magnetic microtraps for ultracold atoms on an atom chip. Mandip Singh, M. Volk, A. Akulshin, R. McLean, A. Sidorov and P. Hannaford. J. Phys. B: At. Mol. Opt. 41, 065301, 2008.
  • Steep atomic dispersion by velocity selective optical pumping. A. Akulshin, Mandip Singh, R. McLean, A. Sidorov and P. Hannaford. Optics Express 16 15363-6, 2008.
  • Book chapter: Bose Einstein condensates on magnetic film microstructures, M. Singh, S. Whit- lock, R. Anderson, S. Ghanbari, B.V. Hall, M. Volk, A. Akulshin, R. McLean, A. Sidorov, P. Hannaford., Laser Spectroscopy pp 228-239, (2008).