Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Marty Stevens (Fed)

Staff Scientist

Martin J. Stevens is a member of the Quantum Nanophotonics Group at NIST-Boulder, where he works on single-photon sources, entangled-photon sources, and single-photon detectors. Dr. Stevens was an early pioneer in the use of superconducting nanowire single-photon detectors (SNSPDs) in photon counting and quantum optics applications. He has worked with collaborators around the world implementing these sources and detectors in a variety of experiments, ranging from studies of solid-state and molecular physics to fundamental tests of the quantum nature of light. He developed optical measurement techniques that have led to a better understanding of how SNSPDs operate. Dr. Stevens played a key role in NIST’s 2015 loophole-free test of Bell’s inequality, and helped lead NIST efforts in understanding whether entangled-photon pairs can be used to improve multiphoton microscopy.

Awards

  • Department of Commerce Silver Medal, 2021
  • Department of Commerce Gold Medal, 2016
  • Department of Commerce Bronze Medal, 2009
  • National Research Council Postdoctoral Fellowship, 2005

Selected Publications

Experimental Low-Latency Device-Independent Quantum Randomness

Author(s)
Yanbao Zhang, Lynden K. Shalm, Joshua C. Bienfang, Martin J. Stevens, Michael D. Mazurek, Sae Woo Nam, Carlos Abellan, Waldimar Amaya, Morgan Mitchell, Honghao Fu, Carl A. Miller, Alan Mink, Emanuel H. Knill
Applications of randomness such as private key generation and public randomness beacons require small blocks of certified random bits on demand. Device

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

Hotspot Relaxation Dynamics in a Current Carrying Superconductor

Author(s)
Francesco Marsili, Martin Stevens, Alex Kozorezov, Varun Verma, Colin Lambert, Jeffrey A. Stern, Rob Horansky, Shellee D. Dyer, Shannon Duff, David P. Pappas, Matthew Shaw, Richard 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

Publications

Demonstration that Einstein-Podolsky-Rosen Steering Requires More than One Bit of Faster-than-Light Information Transmission

Author(s)
Yu Xiang, Michael Mazurek, Joshua Bienfang, Michael Wayne, Carlos Abellan, Waldimar Amaya, Morgan Mitchell, Richard Mirin, Sae Woo Nam, Qiongyi He, Marty Stevens, Krister Shalm, Howard Wiseman
Schrödinger held that a local quantum system has some objectively real quantum state and no other (hidden) properties. He therefore took the Einstein-Podolsky
Created October 9, 2019, Updated April 24, 2023