Dr. Curtis J. Broadbent

Assistant Professor Part-Time
Rochester Theory Center,
Center for Coherence and Quantum Optics,
and Department of Physics and Astronomy
University of Rochester
Rochester, NY 14627
Telephone: (585) 275-6986
e-mail: curtis.broadbent [at] rochester [dot] edu
Curriculum Vitae

Research Interests

Curtis Broadbent is an assistant professor (part-time) in the Department of Physics and Astronomy at the University of Rochester. He was most recently a post-doctoral research associate in Joe Eberly's research group in theoretical quantum optics (Eberly Research Group), also at the University of Rochester. He is currently investigating non-Markovian effects in open quantum systems, measures of genuinely multipartite entanglement, entropic steering inequalities, quantum state discrimination, long-distance quantum key distribution, and weak measurements.

Curtis graduated in August of 2010 from John Howell's experimental quantum optics research group (Howell Research Group) in the Department of Physics and Astronomy. While in John's group he worked on projects related to quantum image discrimination, slow light with entangled photons and pseudo-thermal light, and applications of bipartite photonic entanglement to quantum cryptography. Additionally, he collaborated with Andrew Jordan's research group (Jordan Research Group) on an experimental and theoretical investigation into non-local weak-value measurements.

Curtis completed his undergraduate degree at Brigham Young University with a B.S. in Physics in 2003. At Brigham Young University he worked with Scott Glasgow and Justin Peatross on dynamical notions of energy loss and irreversibility in phenomenologically modeled dielectric/field systems.

Recent publications

[17] Uncertainty Relation for Mutual Information
James Schneeloch, Curtis J. Broadbent, and John C. Howell
Physical Review A 90, 062119 (2014). View PDF

[16] Improving Einstein-Podolsky-Rosen Steering Inequalities with State Information
James Schneeloch, Curtis J. Broadbent, and John C. Howell
Physics Letters A 378, 766 (2014). View PDF

[15] Bell Violation for unknown continuous variable states
Xiao-Feng Qian, Curtis J. Broadbent, and Joseph H. Eberly
New Journal of Physics 16 013033 (2014). View PDF

[14] Bounding the entanglement of N qubits with only four measurements
S. Mohammad Hashemi Rafsanjani, Curtis J. Broadbent, and Joseph H. Eberly
Physical Review A 88, 062331 (2013). View PDF

[13] EPR Steering Inequalities from Entropic Uncertainty Relations
James Schneeloch, Curtis J. Broadbent, Stephen P. Walborn, Eric G. Cavalcanti, and John C. Howell
Physical Review A 87, 062103 (2013). View PDF

[12] Null Values and Quantum State Discrimination
Oded Zilberberg, Alessandro Romito, David J. Starling, Gregory A. Howland, Curtis J. Broadbent, John C. Howell, and Yuval Gefen
Physical Review Letters 110, 170405 (2013). View PDF

[11] Violation of Continuous-Variable Einstein-Podolsky-Rosen Steering with Discrete Measurements
James Schneeloch, P. Ben Dixon, Gregory A. Howland, Curtis J. Broadbent, and John C. Howell
Physical Review Letters 110, 130407 (2013). View PDF

[10] Genuinely Multipartite Concurrence of N-qubit X-matricies
S. Mohammad Hashemi Rafsanjani, Marcus Huber, Curtis J. Broadbent, and Joseph H. Eberly
Physical Review A 86, 062303 (2012). View PDF

[9] Solving non-Markovian open quantum systems with multi-channel reserovir coupling
Curtis J. Broadbent, Jun Jing, Ting Yu and Joseph H. Eberly
Annals of Physics 327, 1962-1973 (2012). View PDF

[8] Extracting an entanglement signature from only classical mutual information
David J. Starling, Curtis J. Broadbent and John C. Howell
Physical Review A 84, 032305 (2011). View PDF

[7] Experimental Violation of Two-Party Leggett-Garg Inequalities with Semiweak Measurements
Justin Dressel, Curtis J. Broadbent, Andrew N. Jordan, and John C. Howell
Physical Review Letters 106, 040402 (2011). View PDF

[6] Discriminating Orthogonal Single-Photon Images
Curtis J. Broadbent, Petros Zerom, HeeDeuk Shin, John C. Howell, and Robert W. Boyd
Physical Review A 79, 033802 (2009). View PDF

[5] Preservation of Energy-Time Entanglement in a Slow Light Medium
Curtis J. Broadbent, Ryan M. Camacho, Ran Xin, and John C. Howell
Physical Review Letters 100, 133602 (2008). View PDF

[4] Large-alphabet QKD using energy-time entangled bipartite states
Irfan Ali-Khan, Curtis J. Broadbent, and John C. Howell
Physical Review Letters 98, 060503 (2007). View PDF

[3] All-Optical Delay of Images using Slow Light
Ryan M. Camacho, Curtis J. Broadbent, Irfan Ali-Khan, and John C. Howell
Physical Review Letters 98, 043902 (2007). View PDF. See the Washington Post article.

[2] Dynamical energy and loss in dispersive/dissipative dielectrics
C. Broadbent, G. Hovhannisyan, J. Peatross, M. Clayton, and S. A. Glasgow
in Focus on Lasers and Electro-Optics Research, ed. W. T. Arkin, 253-261 (Nova Science Publishers, 2004).

[1] Reversible and Irreversible Processes in Dispersive/Dissipative Media: Electro-Magnetic Free Energy and Heat Production
C. Broadbent, G. Hovhannisyan, M. Clayton, J. Peatross, and S. A. Glasgow
in Ultra-Wideband Short-Pulse Electromagnetics 6, eds. E. L. Mokole, M. Kragalot, and K. Gerlach, 131-142, (Plenum Publishers 2002).

Recent presentations:

Revealing quantum steering using entropy: The EPR paradox meets information theory
C. J. Broadbent
Quantum Optics Seminar, University of Toronto, Ontario, Canada (Oct. 2013).

Entropic EPR Steering Inequalities
C. J. Broadbent, J. Schneeloch, S. P. Walborn, E. G. Cavalcanti, and J. C. Howell
Frontiers in Optics/Laser Science 2013, Orlando, FL (Oct. 2013).

Witnessing Continuous Variable Einstein-Podolsky-Rosen Steering with Discrete Measurements
J. Schneeloch, P. B. Dixon, C. J. Broadbent, G. A. Howland, and J. C. Howell
Frontiers in Optics/Laser Science 2013, Orlando, FL (Oct. 2013).

Einstein-Podolsky-Rosen Steering Inequalities from Entropic Uncertainty Relations
J. Schneeloch, C. J. Broadbent, S. P. Walborn, E. G. Cavalcanti, and J. C. Howell
Conference on Quantum Information and Quantum Control, Toronto, Ontario, Canada (August 2013).

Violation of Continuous Variable EPR Steering with Discrete Measurements
J. Schneeloch, P. B. Dixon, G. A. Howland, C. J. Broadbent, and J. C. Howell
CLEO: QELS Fundamental Science, San Jose, CA (June 2013).

Single Photon Slow Light: Quantum Optics at a Snail's Pace
C. J. Broadbent
Photons after Dark Talk Series, Rochester Institute of Technology, Henrietta NY (Mar. 2013).

Quantum Optics Theory and Computation
J. H. Eberly, C. J. Broadbent, and X. Wang
Center for Integrated Research Computing Symposium, University of Rochester, Rochester NY (Dec. 2011).

Probabilistic Evasion of Environment-Induced Decoherence
C. J. Broadbent
Department of Mathematics Colloquium, Brigham Young University, Provo UT (Nov. 29, 2011).

Reduced decoherence in Non-Markovian systems lacking decoherence free subspaces
C. J. Broadbent, J. Jing, T. Yu, and J. H. Eberly
Frontiers in Optics 2011/Laser Science XXVII, San Jose CA (Oct. 2011).

Managing Decoherence (when it cannot be avoided)
C. J. Broadbent, J. Jing, T. Yu, and J. H. Eberly
Invited Speaker, Buffalo Workshop in Quantum Computing, Buffalo NY (Sept. 2011).

Explorations into quantum state diffusion beyond the Markov approximation
C. J. Broadbent, J. Jing, T. Yu, and J. H. Eberly
Poster, Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics, Atlanta GA (June 2011).

Extracting an entanglement signature from only classical mutual information
D. J. Starling, C. J. Broadbent*, and J. Howell
Conference on Laser and Electro-Optics, Baltimore MD (May 2011). *Author added after abstract submission.

Experimental Violation of a Non-local Leggett-Garg Inequality Using Non-local Weak Measurements
C. J. Broadbent, J. Dressel, A. N. Jordan and J. C. Howell
Frontiers in Optics 2010, Rochester NY (Oct. 24-28, 2010).

A Weak Value Inequality as a Test for Local Realism
J. Dressel, C. J. Broadbent, and A. N. Jordan
Quantum Coherence and Entanglement, CLEO/QELS 2010, San Jose CA (May 16-21, 2010).

Single Photon Image Discrimination
C.J. Broadbent, J. C. Howell, H. Shin, P. Zerom, and R. W. Boyd
Quantum Entanglement and Decoherence, 3rd International Conference on Quantum Information (ICQI) 2008, Boston MA (July 13-16, 2008).

Slow Light with Fourth Order Fields
C.J. Broadbent, P. K. Vudyasetu, R. M. Camacho, R. Xin, and J. C. Howell
Slow and Fast Light 2008, Boston MA (July 13-16, 2008).

Preservation of Entanglement in a Slow Light Medium
C.J. Broadbent, R. M. Camacho, R. Xin, and J. C. Howell
QELS Symposium on Quantum Light-Matter Interfaces, CLEO/QELS 2008, San Jose CA (May 4-9, 2008).

Large Alphabet Quantum Key Distribution
I. Ali Khan, J. C. Howell, and C.J. Broadbent
Poster, Frontiers in Optics 2006/Laser Science XXII, Rochester NY (Oct. 8-13, 2006).

Theoretical and Practical Limits of Large Alphabet Energy-Time Quantum Key Distribution
C.J. Broadbent, A. Toulouse, I. Ali Khan, P. A. Lopata, T. Bahder, and J. C. Howell
Frontiers in Optics 2006/Laser Science XXII, Rochester NY (Oct. 8-13, 2006).

Large Dimensional Energy Time Quantum Key Distribution
C.J. Broadbent, I. Ali Khan and J. C. Howell,
Poster, ARO/DTO Joint QIST Conference & Program Review, San Antonio TX (June 5-9, 2006).

Experimental Demonstration of Large Alphabet QKD using Energy Time Entanglement
I. Ali Khan, C. J. Broadbent, and J. C. Howell
CLEO/QELS Postdeadline Paper, Long Beach CA (May 21-26, 2006).

Thermodynamics of Dispersive Media
S. A. Glasgow, J. Peatross, M. Ware, and C. Broadbent
Frontiers in Optics/Laser Science XX, Rochester, New York, (Oct. 12, 2004).

Separation of mechanical and heat energy in an absorbing medium
C. J. Broadbent, M. Clayton, S. A. Glasgow, G. Hovhannisyan, and J. Peatross
OSA Annual Meeting/LS-XVIII, Orlando, Florida, (Oct. 1, 2002).