
Daniel J Gauthier, Research Professor of Physics and CNCS: Center for nonlinear and complex systems and Professor of Electrical and Computer Engineering and Bass Fellow of Physics
Prof. Gauthier is interested in a broad range of topics in the fields of nonlinear and quantum optics, and nonlinear dynamical systems.
In the area of optical physics, his group is studying the fundamental characteristics of highly nonlinear lightmatter interactions at both the classical and quantum levels and is using this understanding to develop practical devices.
At the quantum level, his group has three major efforts in the area of quantum communication and networking. In one project, they are investigating hybrid quantum memories where one type of memory is connected to another through the optical field (socalled flying qubits). In particular, they are exploring nonlinear optical methods for frequency converting and impedance matching photons emitted from one type of quantum memory (e.g., trapped ions) to another (e.g., quantum dots).
In another project, they are exploring methods for efficiently transmitting a large number of bits of information per photon. They are encoding information on the various photon degrees of freedom, such as the transverse modes, one photon at a time, and using efficient mode sorters to direct the photons to singlephoton detectors. The experiments make use of multimode spontaneous down conversion in a nonlinear crystal to produce quantum correlated or entangled photon pairs.
Another recent interest is the development of the world's most sensitive alloptical switch. Currently, they have observed switching with an energy density as low as a few hundred yoctoJoules per atomic crosssection, indicating that the switch should be able to operate at the singlephoton level. The experiments use a quasionedimensional ultracold gas of rubidium atoms as the nonlinear material. They take advantage of a onedimensional optical lattice to greatly increase the nonlinear lightmatter interaction strength.
In the area of nonlinear dynamics, his group is interested in the control and synchronization of chaotic devices, especially optical and radiofrequency electronic systems. They are developing new methods for private communication of information using chaotic carriers, using chaotic elements for distance sensing (e.g., lowprobabilityofdetection radar), using networks of chaotic elements for remote sensing, and using chaotic elements for generating truly random numbers at high data rates. Recently, the have observed 'Boolean chaos,' where complex behavior is observed in a small network of commerciallyavailable freerunning logic gates.
 Contact Info:
 Education:
Optics  University of Rochester  1989 
Ph.D.  University of Rochester  1989 
Optics  University of Rochester  1983 
M.S.  University of Rochester  1983 
Optics  University of Rochester  1982 
B.S.  University of Rochester  1982 
 Specialties:

Atomic, molecular, and optical physics
Heart, Electrophysiology Experimental condensed matter physics Nonlinear dynamics and complex systems
 Research Interests: Quantum Electronics, Quantum Optics, and Nonlinear Dynamics
Prof. Gauthier is interested in a broad range of topics in the
fields of nonlinear and quantum optics, and nonlinear
dynamical systems.
In the area of optical physics, his group is studying
the fundamental characteristics of highly nonlinear lightmatter
interactions at both the classical and quantum levels and is using this understanding to develop practical
devices.
At the quantum level, his group has three major efforts in the area of quantum communication and networking. In one project, they are investigating hybrid quantum memories where one type of memory is connected to another through the optical field (socalled flying qubits). In particular, they are exploring nonlinear optical methods for frequency converting and impedance matching photons emitted from one type of quantum memory (e.g., trapped ions) to another (e.g., quantum dots).
In another project, they are exploring methods for efficiently transmitting a large number of bits of information per photon. They are encoding information on the various photon degrees of freedom, such as the transverse modes, one photon at a time, and using efficient mode sorters to direct the photons to singlephoton detectors. The experiments make use of multimode spontaneous down conversion in a nonlinear crystal to produce quantum correlated or entangled photon pairs.
Another recent interest is the development of the world's most
sensitive alloptical switch. Currently, they have observed switching
with an energy density as low as a few hundred yoctoJoules per atomic
crosssection, indicating that the switch should be able to operate at
the singlephoton level. The experiments use a quasionedimensional ultracold gas of rubidium atoms as the nonlinear material. They take advantage of a onedimensional optical lattice to greatly increase the nonlinear lightmatter interaction strength.
In the area of nonlinear dynamics, his group is interested in the
control and synchronization of chaotic devices, especially optical and
radiofrequency electronic systems. They are developing new
methods for private communication of information using chaotic
carriers, using chaotic elements for distance sensing (e.g.,
lowprobabilityofdetection radar), using networks of chaotic elements
for remote sensing, and using chaotic elements for generating truly
random numbers at high data rates. Recently, the have observed 'Boolean chaos,' where complex behavior is observed in a small network of commerciallyavailable freerunning logic gates.
 Keywords:
Absorption • Action Potentials • Adaptation, Physiological • Algorithms • Animals • Anisotropy • Arrhythmias, Cardiac • Atrial Fibrillation • Axons • Biological Clocks • Biophysics • Biosensing Techniques • Body Surface Potential Mapping • Cardiac Pacing, Artificial • Computer Simulation • ComputerAided Design • Computers • controlling chaos • Cornea • Descemet Stripping Endothelial Keratoplasty • Diastole • Dogs • Electric Stimulation • Electrodes • Electrophysiologic Techniques, Cardiac • Electrophysiology • Equipment Design • Equipment Failure Analysis • Feedback • Female • Fiber Optic Technology • Fuchs' Endothelial Dystrophy • Gold • Heart • Heart Atria • Heart Conduction System • Heart Rate • Heart Ventricles • Humans • Hyperopia • Ions • Lasers • Light • Logistic Models • Magnetics • Male • Mathematical Concepts • Membrane Potentials • Metal Nanoparticles • Microelectrodes • Microwaves • Models, Animal • Models, Cardiovascular • Models, Chemical • Models, Neurological • Models, Statistical • Models, Theoretical • Muscle Cells • Myocardial Contraction • Myocardium • Myocytes, Cardiac • Nanotechnology • Nanowires • Neural Conduction • Neural Networks (Computer) • Noise • nonlinear dynamics • Nonlinear Dynamics • nonlinear optics • Optical Fibers • Optical Tweezers • Optics and Photonics • Pacemaker, Artificial • Phantoms, Imaging • Predictive Value of Tests • quantum optics • Quantum Theory • Rabbits • Rana catesbeiana • Refraction, Ocular • Refractometry • Reproducibility of Results • Retrospective Studies • Scattering, Radiation • Semiconductor lasers • Sensitivity and Specificity • Sheep • Signal Processing, ComputerAssisted • singlephoton switching • slow light • Surface Plasmon Resonance • Symbolic dynamics • synchronizing chaos • Systems Theory • Telecommunications • Time Factors • Ventricular Fibrillation • Ventricular Function
 Current Ph.D. Students
(Former Students)
 Postdocs Mentored
 Christoph Wildfeuer (August 1, 2012  July, 2013)
 Damien Rontani (October, 2011  November, 2013)
 Carolyn Berger (January 01, 2009  August 30, 2008)
 Rui Zhang (February, 2008  September, 2011)
 Hugo L Cavalcante (February, 2008  August, 2011)
 Eduardo GranadoCabrera (October 1, 2007  September 30, 2008)
 Xiaopeng Zhang (May 01, 2005  June 30, 2007)
 Zhaoming Zhu (September 01, 2004  June 30, 2008)
 Lucas Illing (February 01, 2003  June 30, 2007)
 Elena Tolkacheva (May 1, 2001  June 30, 2004)
 John C. Swartz (January, 1999  September, 1999)
 Olivier Pfister (1997  1999)
 Sonya Bahar (1997  1999)
 Jeff R. Gardner (1995  1997)
 Recent Publications
(More Publications)
 Cahall, C; Nicolich, KL; Islam, NT; Lafyatis, GP; Miller, AJ; Gauthier, DJ; Kim, J, Multiphoton detection using a conventional superconducting nanowire singlephoton detector,
Optica, vol. 4 no. 12
(December, 2017),
pp. 15341535 [doi] [abs]
 Islam, NT; Lim, CCW; Cahall, C; Kim, J; Gauthier, DJ, Provably secure and highrate quantum key distribution with timebin qudits.,
Science Advances, vol. 3 no. 11
(November, 2017),
pp. e1701491 [doi] [abs]
 Stipčević, M; Christensen, BG; Kwiat, PG; Gauthier, DJ, Advanced active quenching circuit for ultrafast quantum cryptography,
Optics express, vol. 25 no. 18
(September, 2017),
pp. 2186121861 [doi]
 Shea, ME; Gauthier, DJ, Comment on “Nondestructive lightshift measurements of single atoms in optical dipole traps”,
Physical Review A, vol. 96 no. 2
(August, 2017) [doi]
 Islam, NT; Cahall, C; Aragoneses, A; Lezama, A; Kim, J; Gauthier, DJ, Robust and Stable Delay Interferometers with Application to Dimensional TimeFrequency Quantum Key Distribution,
Physical review applied, vol. 7 no. 4
(April, 2017) [doi]
 Selected Invited Lectures
 Toward SinglePhoton Nonlinear Optics via SelfAssembled Ultracold Atoms, October 26, 2010, Frontiers in Optics 2010/Division of Laser Science XXVI, Rochester, NY
 'High throughput, high bitperphoton quantum communication, September 24, 2010, QIBEC (Quantum Information/BEC) Seminar, NIST, Gaithersburg, MD
 'Using selfassembly to enable singlephoton nonlinear optics, May 26, 2010, EECS Distinguished Seminar Series, Northwestern University
 Observation of chaos in small networks of Booleanlike logic circuits, April 09, 2010, SCCAMM Workshop on Nonlinear Dynamics of Networks, University of Maryland, College Park, MD
 Slow light applications of forward stimulated Brillouin scattering, January 25, 2010, Photonics West, San Francisco, CA
 Boolean Chaos, January 05, 2010, Dynamics Days 2010, Chicago, IL
 Boolean Delay Systems, October 06, 2009, Workshop on Delayed Complex Systems, MaxPlanck Institute for the Physics of Complex Systems, Dresden, Germany
 Slow and stopped light in optical waveguides, August 29, 2008, DTU Fotonik Seminar, Danmarks Tekniske Universitet, Bygning, Denmark
 Broadband chaos in timedelay photonic and electroic devices: Potential implications for sensor networks, May 23, 2007, Nonlinear Dynamics Seminar, University of Maryland, College Park, MD
 Ultralowlightlevel alloptical switching, September 15, 2006, Physics Department Colloquium, Ohio University, Athens, OH
 Discovery of a new type of bifurcation in paced cardiac muscle, July 14, 2006, Third Workshop Promotionskolleg, Helmholtz Center for Brain and Mind Dynamics, Liebenwalde, Germany
