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Displaying 1 - 25 of 95

Constraints on Gaussian Error Channels and Measurements for Quantum Communication

April 10, 2023
Alexander T. Kwiatkowski, Ezad Shojaee, Sristy Agrawal, Akira Kyle, Curtis Rau, Scott Glancy, Emanuel Knill
Joint Gaussian measurements of two quantum systems are important for quantum communication between remote parties and are often used in continuous-variable teleportation or entanglement-swapping protocols. Many of the errors in real-world implementations

Synchronization and Coexistence in Quantum networks

March 27, 2023
Ivan Burenkov, Alexandra Semionova, FNU Hala, Thomas Gerrits, Anouar Rahmouni, DJ Anand, Ya-Shian Li-Baboud, Oliver T. Slattery, Abdella Battou, Sergey Polyakov
We investigate the coexistence of clock synchronization protocols with quantum signals in a common single-mode optical fiber. By measuring optical noise between 1500 nm to 1620 nm we demonstrate a potential for up to 100 quantum DWDM channels coexisting

Experimental Ambitions for DC-Area Quantum Network Testbed

March 23, 2023
Oliver T. Slattery, Adam Black
Quantum networks [1] bear the promise of one day enabling diverse applications such as secure communications, distributed quantum computing, distributed sensing, and time distribution, in addition to other applications not yet identified. In recent years

Portable polarization-entangled photon source & receiver toolset for quantum network metrology

October 4, 2022
Anouar Rahmouni, Thomas Gerrits, Paulina Kuo, Dileep Reddy, Lijun Ma, Xiao Tang, Oliver T. Slattery
A quantum network will consist of many physically separated nodes connected by quantum communication channels that distribute entanglement between them. Such nodes will require mechanisms for the generation, routing, and measurement of quantum states to

Towards entangled photon pair generation from SiC-based microring resonator

October 4, 2022
Anouar Rahmouni, Lijun Ma, Xiao Tang, Thomas Gerrits, Lutong Cai, Qing Li, Oliver T. Slattery
Entangled photon sources are fundamental building blocks for quantum communication and quantum networks. Recently, silicon carbide emerged as a promising material for integrated quantum devices since it is CMOS compatible with favorable mechanical

Resource optimization of quantum-enabled channels using novel modulation schemes

July 21, 2021
Jabir Marakkarakath Vadakkepurayil, FNU Nur Fajar Rizqi Annafianto, Ivan Burenkov, Abdella Battou, Sergey Polyakov
We introduce new practical modulation schemes inspired by the quantum measurement. We experimentally show that our quantum-enabled communication system optimizes the combined resource efficiency (CRE) beyond the classical, shot-noise-limited CRE.

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

May 28, 2021
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-Rosen (EPR) phenomenon, which he generalized and called 'steering', to require nonlocal

Practical quantum-enhanced receivers for classical communication

April 20, 2021
Ivan Burenkov, Jabir Marakkarakath Vadakkepurayil, Sergey Polyakov
Communication is an integral part of human life. Today, optical pulses are the preferred information carriers for long-distance communication. The exponential growth in data leads to a "capacity crunch" in the underlying physical systems. One of the

Compact and Tunable Forward Coupler Based on High-Impedance Superconducting Nanowires

February 25, 2021
Marco Colangelo, Di Zhu, Daniel F. Santavicca, Brenden Butters, Joshua Bienfang, Karl K. Berggren
Developing compact, low-dissipation, cryogenic-compatible microwave electronics is essential for scaling up low-temperature quantum computing systems. In this paper, we demonstrate an ultracompact microwave directional forward coupler based on high

A simple low-latency real-time certifiable quantum random number generator

February 24, 2021
Yanbao Zhang, Hsin-Pin Lo, Alan Mink, Takuya Ikuta, Toshimori Honjo, Hiroki Takesue, William Munro
Quantum random numbers distinguish themselves from others by their intrinsic unpredictability arising from the principles of quantum mechanics. As such they are extremely useful in many scientific and real-world applications with considerable efforts going

Experimental demonstration of the near-quantum optimal receiver

November 19, 2020
Jabir Marakkarakath Vadakkepurayil, Ivan Burenkov, FNU Nur Fajar Rizqi Annafianto, Abdella Battou, Sergey Polyakov
We implement the cyclic quantum receiver based on the theoretical proposal of Roy Bondurant and demonstrate experimentally below the shot-noise limit (SNL) discrimination of quadrature phase-shift keying signals (PSK). We also experimentally test the

A kilopixel array of superconducting nanowire single-photon detectors

November 18, 2019
Varun Verma, Adriana Lita, Sae Woo Nam, R P. Mirin, Emma Wollman, William Farr, Matthew Shaw
We present a 1024-element imaging array of superconducting nanowire single photon detectors (SNSPDs) using a 32x32 row-column multiplexing architecture. Large arrays are desirable for applications such as imaging, spectroscopy, or particle detection.

Background and Review of Cavity-Enhanced Spontaneous Parametric Down-Conversion

August 22, 2019
Oliver T. Slattery, Lijun Ma, Kevin Zong, Xiao Tang
Spontaneous parametric down-conversion (SPDC) in a nonlinear crystal has been a workhorse for the generation of entangled and correlated single-photon pairs used for quantum communications applications for nearly three decades. However, as a naturally

Design and performance study of actively holding-off GHz-gated InGaAs/InP SPADs

May 13, 2019
Alessandro Restelli, Joshua C. Bienfang, Alan L. Migdall
High-speed periodic gating of InGaAs/InP single-photon avalanche diodes (SPADs) has allowed these detectors to operate at count rates above $10^8$ per second with low-afterpulsing. However, a drawback of high-speed periodic gating is that bias gates are

Towards a source of entangled photon pairs in gallium phosphide

May 9, 2019
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.

Generating polarization-entangled photon pairs in domain-engineered PPLN

May 7, 2019
Paulina S. Kuo, Varun B. Verma, Thomas Gerrits, Sae Woo Nam, Richard P. Mirin
Using a periodically poled LiNbO3 crystal that is domain-engineered for two simultaneous type-II down-conversion processes, we demonstrated polarization-entangled photon-pair generation.

A post-processing-free single-photon random number generator with ultra-low latency.

December 10, 2018
Michael A. Wayne, Joshua C. Bienfang, Zachary H. Levine, Alan L. Migdall
The low-latency requirements of a practical loophole-free Bell test preclude time-consuming post- processing steps that are often used to improve the statistical quality of a physical random number generator (RNG). Here we demonstrate a post-processing

Jitter Sensitivity Analysis for Pulsed-Output RF Superconducting Digital to Analog Converters

November 5, 2018
Christine A. Donnelly, Justus A. Brevik, Paul D. Dresselhaus, Peter F. Hopkins, Samuel P. Benz
We present the first analysis of the jitter sensitivity of a superconductive digital-to-analog converter (DAC)for use as a reference RF source. This analysis is important for maintaining quantum-accurate voltage output as we extend our superconductor-based
Displaying 1 - 25 of 95