Skip to main content
U.S. flag

An official website of the United States government

Dot gov

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.

Https

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.

Search Publications by Varun Verma

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 1 - 25 of 50

Quantum Frequency Conversion of a Quantum Dot Single-Photon Source on a Nanophotonic Chip

Author(s)
Anshuman Singh, Qing Li, Shunfa Liu, Ying Yu, Xiyuan Lu, Christian Schneider, Sven Hofling, John R. Lawall, Varun B. Verma, Richard P. Mirin, Sae Woo Nam, Jin Liu, Kartik A. Srinivasan
Single self-assembled InAs/GaAs quantum dots are promising bright sources of indistinguishable photons for quantum information science. However, their

Towards a source of entangled photon pairs in gallium phosphide

Author(s)
Paulina S. Kuo, Peter G. Schunemann, Mackenzie Van Camp, Varun B. Verma, Thomas Gerrits, Sae Woo Nam, Richard P. Mirin
We investigate parametric down-conversion in orientation-patterned GaP. Pumped at 865 nm, the signal and idler are at 1350 nm and 2400 nm, respectively.

Short-wave infrared compressive imaging of single photons

Author(s)
Thomas Gerrits, Daniel Lum, Varun B. Verma, John Howell, Richard P. Mirin, Sae Woo Nam
We present a short-wave infrared (SWIR) single photon camera based on a single superconducting nanowire single photon detector (SNSPD) and compressive imaging

Towards integrated superconducting detectors on lithium niobate waveguides

Author(s)
Jan P. Hoepker, Moritz Bartnick, Evan Meyer-Scott, Frederik Thiele, Stephan Krapick, Nicola Montaut, Matteo Santandrea, Harald Herrmann, Sebastian Lengeling, Raimund Ricken, Victor Quiring, Torsten Meier, Adriana E. Lita, Varun B. Verma, Thomas Gerrits, Sae Woo Nam, Christine Silberhorn, Tim J. Bartley
Superconducting detectors are now well-established tools for low-light optics, and in particular quantum optics, boasting high-efficiency, fast response and

Demonstration of EPR steering using single-photon path entanglement and displacement-based detection

Author(s)
T Guerreiro, F. Monteiro, A Martin, J B. Brask, T Vertesi, Boris Korzh, Felix Bussieres, Varun B. Verma, Adriana E. Lita, Richard P. Mirin, Sae Woo Nam, Francesco Marsili, Matthew D. Shaw, Nicolas Gisin, Nicolas Brunner, Hugo Zbinden, Robert Thew
We demonstrate the violation of an EPR steering inequality developed for single photon path entanglement with displacement-based detection. We use a high-rate

Hotspot Relaxation Dynamics in a Current Carrying Superconductor

Author(s)
Francesco Marsili, Martin J. Stevens, Alex Kozorezov, Varun B. Verma, Colin Lambert, Jeffrey A. Stern, Robert D. Horansky, Shellee D. Dyer, Shannon M. Duff, David P. Pappas, Matthew Shaw, Richard P. Mirin, Sae Woo Nam
When a photon is absorbed in a superconductor it creates a region of nonequilibrium superconductivity referred to as a hotspot [1]. The operation of most

A strong loophole-free test of local realism

Author(s)
Lynden K. Shalm, Evan Meyer-Scott, B. G. Christensen, Peter L. Bierhorst, Michael A. Wayne, Deny Hamel, Martin J. Stevens, Thomas Gerrits, Scott C. Glancy, Michael S. Allman, Kevin J. Coakley, Shellee D. Dyer, Adriana E. Lita, Varun B. Verma, Joshua C. Bienfang, Alan L. Migdall, Yanbao Zhang, William Farr, Francesco Marsili, Matthew D. Shaw, Jeffrey Stern, Carlos Abellan, Waldimar Amaya, Valerio Pruneri, Thomas Jennewein, Morgan Mitchell, P. G. Kwiat, Richard P. Mirin, Emanuel H. Knill, Sae Woo Nam
We present a loophole-free violation of local realism using entangled photon pairs. We ensure that all relevant events in our Bell test are spacelike separated

Quasiparticle recombination in hotspots in superconducting current-carrying nanowires

Author(s)
Alex Kozorezov, Colin Lambert, Francesco Marsili, Martin J. Stevens, Varun B. Verma, Jeffrey A. Stern, Robert D. Horansky, Shellee D. Dyer, Shannon M. Duff, David P. Pappas, Adriana E. Lita, Matthew D. Shaw, Richard P. Mirin, Sae Woo Nam
We describe a kinetic model of recombination of nonequilibrium quasiparticles generated by single photon absorption in superconducting current-carrying