An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.
The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.
NRC Postdoctoral Fellow
My research interests form an eclectic mix of fields including quantum optics, quantum information, remote sensing, and compressive imaging. My interests primarily regard applied physics to answer the question How can I use my knowledge of optics, quantum mechanics, and signal processing to solve difficult problems related to low-light remote sensing and imaging problems? As such, my current project here at NIST is to help bridge the gap between quantum optics and biological imaging. My specific interests can be summarized by the following points:
Computational Imaging: This includes both compressive imaging and lensless imaging techniques for a variety of remote sensing applications from microscopic to astronomical. Applications include entanglement characterizations, wavefront sensing, and compressive measurements of an optical Dirac matrix (yielding similar information obtained through Fourier ptychography), and endoscopic imaging through multimode fibers.
Remote Sensing: Pulsed LiDAR , Frequency-Modulated Continuous-Wave LiDAR, and Doppler measurements are two interesting topics with a broad range of applications. I have worked on projects requiring the design and development signal processing algorithms together with optical design to push the envelope of low-light ranging and Doppler measurements.
Quantum information: A significant amount of research has been done in the fields of quantum information which includes topics such as quantum key distribution (QKD). I am interested in protocols related to quantum data locking (QDL) that may help increase the key-rates for QKD. While there is much potential for QDL, protocols are currently limited because of the difficult task of transmitting information over a long-range quantum channel (as opposed to QKD which transmits the information over a reliable classical channel). As such, I am interested in developing robust ways of generating quantum channels.
My current task here at NIST is to establish a lower bound over which time-energy entangled photons may enhance two-photon fluorescence for deep-tissue imaging. As such, I am using a Franson interferometer to measure the degree of Bell-violation as a function of tissue depth. A schematic diagram of my experiment is provided.
Samuel H. Knarr, Daniel J. Lum, James Schneeloch, and John C. Howell. Compressive direct imaging ofa billion-dimensional optical phase space. Physical Review A, 98:023854, Aug 2018.
Daniel J. Lum, Samuel H. Knarr, and John C. Howell. Frequency-modulated continuous-wave lidarcompressive depth-mapping. Optics Express, 26(12):15420–15435, Jun 2018.
Thomas Gerrits, Daniel J. Lum, Varun Verma, John C. Howell, Richard P. Mirin, and Sae Woo Nam.Short-wave infrared compressive imaging of single photons. Optics Express, 26(12):15519–15527, Jun 2018.
Daniel J. Lum, John C. Howell, M. S. Allman, Thomas Gerrits, Varun B. Verma, Sae Woo Nam, CosmoLupo, and Seth Lloyd. Quantum enigma machine: Experimentally demonstrating quantum data locking.Physical Review A, 94:022315, Aug 2016.
Gregory A. Howland, Samuel H. Knarr, James Schneeloch, Daniel J. Lum, and John C. Howell. Compressivelycharacterizing high-dimensional entangled states with complementary, random filtering. PhysicalReview X, 6:021018, May 2016.
James Schneeloch, Samuel H. Knarr, Daniel J. Lum, and John C. Howell. Position-momentum Bellnonlocality with entangled photon pairs. Physical Review A, 93:012105, Jan 2016.
Daniel J. Lum, Samuel H. Knarr, and John C. Howell. Fast Hadamard transforms for compressive sensingof joint systems: measurement of a 3.2 million-dimensional bi-photon probability distribution. OpticsExpress, 23(21):27636–27649, Oct 2015.
Gregory A. Howland, Daniel J. Lum, and John C. Howell. Compressive wavefront sensing with weak values.Optics Express, 22(16):18870–18880, Aug 2014.
Gregory A. Howland, James Schneeloch, Daniel J. Lum, and John C. Howell. Simultaneous measurementof complementary observables with compressive sensing. Physical Review Letters, 112:253602, Jun 2014.
Gregory A. Howland, Daniel J. Lum, Matthew R. Ware, and John C. Howell. Photon counting compressivedepth mapping. Optics Express, 21(20):23822–23837, Oct 2013.
Petr M. Anisimov, Daniel J. Lum, S. Blane McCracken, Hwang Lee, and Jonathan P. Dowling. An invisiblequantum tripwire. New Journal of Physics, 12(8):083012, 2010.
Pending Publications (Never approved for publication due to export-controlled information)
Daniel J. Lum, Justin M. Winkler, Samuel H. Knarr, and John C. Howell.Slow-light interferometric frequency-modulated laser radar without an optical local oscillator.
Justin M. Winkler, Daniel J. Lum, Samuel H. Knarr, and John C. Howell.Measurement of kilohertz-level frequency shifts using a slow-light interferometer without a local oscillator.