We are investigating, both theoretically and experimentally, the entanglement properties of two-photon states generated via cw and femtosecond parametric down-conversion in polarization intensity interferometry. We are studying the interference of quantum states that are hyperentangled in frequency, wavevector, and polarization. Of particular interest are the effects of transverse momentum on the nature of the temporal coincidence-rate interference pattern. Our findings improve the capacity to control the quantum state produced by spontaneous parametric down-conversion, and should prove useful to those pursuing the many proposed applications of down-converted light.

1. Controllable frequency entanglement via auto-phase-matched spontaneous
   parametric down-conversion
   Z. D. Walton, M. C. Booth, A. V. Sergienko, B. E. A. Saleh, and M. C. Teich
   Phys. Rev. A 67, 053810 (2003). [PDF]
   
   
2. Multiphoton Stokes-parameter invariant for entangled states
   G. S. Jaeger, M. Teodorescu-Frumosu, A. V. Sergienko,
   B. E. A. Saleh, and M. C. Teich
   Phys. Rev. A 67, 032307 (2003). [PDF]
   
   
3. Multi-photon interferometry
   G. S. Jaeger and A. V. Sergienko, in E. Wolf,
   Progress in Optics 42,
   (Kluwer: Dordrecht, 2001), Chapter 5. [PDF]
   
   
4. Multiparameter entanglement in quantum interferometry
   Mete Atatüre, Giovanni Di Giuseppe, Matthew D. Shaw, Alexander V. Sergienko,
   Bahaa E. A. Saleh, Malvin C. Teich
   Phys. Rev. A 66, 023822 (2002). Co-published in Virtual Journal of Quantum Information and Virtual Journal of Ultrafast Science. [PDF]
   
   
5. Multi-parameter entanglement in femtosecond parametric down-conversion
   Mete Atatüre, Giovanni Di Giuseppe, Matthew D. Shaw, Alexander V. Sergienko, Bahaa E. A. Saleh, and Malvin C. Teich
   Phys. Rev. A 65, 023808 (2002). [PDF]
   
   
6. Demonstration of the complementarity of one- and two-photon interference
   A. F. Abouraddy, M. B. Nasr, B. E. A. Saleh,
   A. V. Sergienko, and M. C. Teich
   Phys. Rev. A 63, 063803 (2001). [PDF]
   
   
7. Entanglement in cascaded-crystal parametric down-conversion
   Mete Atatüre, A. V. Sergienko, B. E. A. Saleh, and M. C. Teich
   Phys. Rev. Lett. 86, 4013-4016 (2001). [PDF]
   
   
8. Double-slit interference of biphotons generated in spontaneous parametric downconversion from a thick source
   A. F. Abouraddy, B. E. A. Saleh, A. V. Sergienko, and M. C. Teich
   J. Opt. B: Quant. Semiclass. Opt. 3, S50-S54 (2001). [PDF]
   
   
9. Complementarity and quantum erasure with entangled-photon states
   T. Tsegaye, G. Björk, M. Atatüre, A. V. Sergienko, B. E. A. Saleh,
   and M. C. Teich
   Phys. Rev. A 62, 032106 (2000). [PDF]
   
   
10. Dispersion-independent high-visibility quantum interference in ultrafast parametric down-conversion
    M. Atatüre, A. V. Sergienko, B. E. A. Saleh, and M. C. Teich
    Phys. Rev. Lett. 84, 618-621 (2000). [PDF]
    
    
11. Partial distinguishability in femtosecond optical parametric down-conversion
    M. Atatüre, A. V. Sergienko, B. M. Jost, B. E. A. Saleh, and M. C. Teich
    Phys. Rev. Lett. 83, 1323-1326 (1999). [PDF]
    
    
12. Dispersion in femtosecond entangled two-photon interference
    J. Perina, Jr., A. V. Sergienko, B. M. Jost, B. E. A. Saleh, and M. C. Teich
    Phys. Rev. A 59, 2359-2368 (1999). [PDF]
    
    
13. Spatial effects in two-and four-beam interference of partially entangled biphotons
    B. E. A. Saleh, A. Joobeur, and M. C. Teich
    Phys. Rev. A  57, 3991-4003 (1998). [PDF]
    
    
14. Quantum interference and indistinguishability with femtosecond pulses
    G. Di Giuseppe, L. Haiberger, F. De Martini, A.V. Sergienko
    Phys. Rev. A  56, R21-R24 (1997). [PDF]
    
    
15. Can two-photon interference be considered the interference of two photons?
    T. B. Pittman, D. V. Strekalov, A. Migdall, M. H. Rubin,
    A. V. Sergienko, and Y. H. Shih
    Phys. Rev. Lett. 77, 1917-1920 (1996). [PDF]
    
    
16. Postselection-free energy-time entanglement
    D. V. Strekalov, T. B. Pittman, A. V. Sergienko, and Y. H. Shih
    Phys. Rev. A 54, R1-R4 (1996). [PDF]
    
    
17. Nonlocal cancellation of dispersive broadening in Mach-Zehnder interferometers
    T. S. Larchuk, M. C. Teich, and B. E. A. Saleh
    Phys. Rev. A 52, 4145-4154 (1995). [PDF]