Jin Wang, Ph.D.
Associate Professor of Physics

E-mail:  jinwang@umich.edu
Phone: (313) 593 5158
Fax:     (313) 593 5158
Office:  2225 SBCW
Lab:  2218CW

Field of Study:Quantum Optics

About

Professor Wang's research activities are focused on a variety of Quantum and Optical Phenomena. The Quantum part of my research involves studying effects in an atomic or subatomic size with single photon precision. This field of research has the potential to revolutionize how computers work as well as guaranteeing secure communications over arbitrarily long distances. The optical aspect of my research explores using optics to measure distance with nanometer precision and constructing pulsed laser cavities. Professor Wang also has theoretical interest in Electromagnetically induced transparency, slow light, quantum feedback control and simulation of quantum systems.

1. Interaction Free Measurement:

This project investigated interaction free measurement which uses the quantum mechanical ability to detect the presence or absence of an object without any photons touching the object. The biological applications include reducing or even eliminating the amount of x-rays that are absorbed during an x-ray or CAT scan. Security applications include detecting an intruder with an undetectable beam of light.


2. Confocal Distance Measurement:

This project investigates using a microscope objective and a monochromatic laser to measure the distance to an object with nanometer resolution. Since the measurement speed can be as high as the photodetector response rate of a gigahertz, this measurement system can measure the deformation of nuclear fusion pellets and also the object to be measured can be as small as bacteria or single celled organisms.


3. Single Photon Measurement:

This project used two time correlated photons in order to measure optical properties of transparent optical materials. The main advantages of using time correlated photons to measure optical properties is a large signal to noise ratio, and a minimum illumination of the material under study.


4.Electronically Induced Transparence (EIT) and Slow Light

The project involved theoretical quantum simulation of Electronically Induced Transparence (EIT) or slow light experiments. The results of this research show that the magnetic field induced Faraday rotation which can cause the polarization of linearly polarized light to rotate. A potential application of this effect could be to measure the magnetic fields on hard disk drives to increase the amount of information stored in the disk.


5. Lead Zirconium Titanate alternatives for Nanoactuators

This project investigated the potential of using low cost ceramic capacitors that are used in common electronics such as cell phones as replacements for precision nanometer precision. The motivation for this project is the need of moving lenses and beam splitters during experiments by a distance of a few atoms. The cost of a single lead containing PZT based nanomover is $70, and the capacitor based mover is less than $2 and is lead free.


6.Customizing Vacuum Fluctuations for Enhanced Entanglement:

This project investigates using cavity dimensions to tune the vacuum fluctuations and obtain entanglement between two atoms in a cavity. It is found that entanglement increases as the size of the cavity decreases, or the reflectivity of the cavity mirrors increases. These results can be used to design or choose a practical system for implementing entanglement between two qubits for quantum computation and information processing. Optical cavities integrated into atom chips hold great promise for experimentally confirming the results of this work and implement scalable quantum computing in the near future.

Lab Movies

Lab Pictures


Selected Publications

1. Jin Wang, Thomas Sutter, Magnolia Landman, and Zahra Seblini, Feedback enhanced entanglement in a spin-1/2 XY dimer model permeated by a transverse magnetic field, AIP Advances 8, 101412 (2018).

2. Jin Wang, Customizing Vacuum Fluctuations for Enhanced Entanglement Creation, Journal of Physics B, 51,135501, 2018.

3. Jin Wang, Single Lens Logarithmic Confocal Distance Measurement Array, Optics Express, 25 (21), 25326-25331, 2017.

4. Jin Wang, Michael Milgie, Kevin Pitt, Multiple Interometer Interaction Free Measurement Using Polarized Light, Journal of Phys. B, 49, 045501, 2016.

5. Jin Wang, Gabe Elghoul, Stephen Peters, Lead Zirconium Titanate alternatives for Nanoactuators, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 60, 256, 2013.

6. Jin Wang, Shawn Strausser, Single Photon Determination of Transmission, Index of Refraction and Material Thickness, Journal of Modern Optics, 59, 381, 2012.

7. Jin Wang, Modelling Decoherence in a Driven Two-Level System Using Random Matrix Theory, Journal of the Optical Society of America B, 29, 75, 2012.

8. Jin Wang, A Comparative Study of the P and Q Representations of a Feedback Controlled Two-Qubit System, Physics Letters A, 375,1860, 2011.

9. Jin Wang, Decoherence effects in an electromagnetically induced transparency and slow light experiment, Physical Review A, 81, 033841, 2010.

10. Jin Wang, Feedback controlled dephasing and population relaxation in a two-level system, Physics Letters A, 373, 1627-1631, 2009.

11. Jin Wang, H. M. Batelaan, Jeermy Podany, A. F. Starace, Entanglement evolution in the presence of decoherence, Journal of Physics B, 39, 4343-4353, 2006. (One out six high light papers in the Journal of Physics B in the year of 2006).

12. Jin Wang, H. M. Wiseman, G. J. Milburn, Dynamical creation of entanglement by homodyne-mediated feedback, Phys. Rev. A 71, 042309-042317, 2005.

13. H. Gao, M. Roseberry, Jin Wang, H. Batelaan, Experimental studies of light propagation and storage in warm atomic gases, Journal of Physics B, 38, 1857-1866, 2005.

14. Stefano Mancini, Jin Wang, Towards feedback control of entanglement, Special Issue of European Physical Journal D, 32, 257-264, 2005.

15. H. M. Wiseman, S. Mancini and Jin Wang, Bayesian feedback versus Markovian feedback in a two-Level atom, Physical Review A 66, 012108-012118, 2002.

16. Jin Wang, H.M. Wiseman, and G. J. Milburn,Non-Markovian homodyne-mediated feedback on a two-level atom: A quantum trajectory treatment, Special Issue of Chemical Physics, 268, 221-233, 2001.

17. Jin Wang, H.M. Wiseman, Feedback-stabilization of an arbitrary pure state of a two-level atom, Physical Review A, 64, 063810-063820, 2001.

18. Jin Wang, H.M. Wiseman, and Z. Ficek, Quantum interference in the fluorescence of a molecular system, Physical Review A, 62, 013818-013829, 2000; erratum 65, 039901, 2002.

19. Jin Wang, Shiqun Zhu, and Jianpin Yin, Saturation effects on intensity fluctuation of laser with multiplicative white noise, Physical Review A, 51, 5035-5038, 1995.

20. Jin Wang, Shiqun Zhu, Dynamical properties of a Laser with correlation between additive and multiplicative noise, Physics Letters A, 207, 47-52, 1995.

Students

Thomas Sutter

Magnolia Landman

Zahra Seblini

Michael Milgie

Kevin Pitt

Gabe Elghoul,

Stephen Peters

Shawn Strausser

Justin Opfermann