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quant-ph2024

Experimental quantum randomness enhanced by a quantum network

Emanuele Polino, Luis Villegas-Aguilar, Davide Poderini +10

The certification of randomness is essential for both fundamental science and information technologies. Unlike traditional random number generators, randomness obtained from nonloc…

quant-ph2024★ 2 cited

Generation of Tunable Three-Photon Entanglement in Cubic Nonlinear Coupled Waveguides

Miguel Bacaoco, Max Galettis, James Huang +2

We theoretically investigate the generation of three-photon states with spatial entanglement in cubic nonlinear coupled waveguides using third-order spontaneous parametric down-con…

quant-ph2024★ 15 cited

Satellite-Terrestrial Quantum Networks and the Global Quantum Internet

Andrea Conti, Robert Malaney, Moe Z. Win

This paper will explore the design and implementation of quantum networks in space integrated with quantum networks on Earth. We propose a three-layer approach, involving GEO and L…

quant-ph2024★ 7 cited

Certifying the quantumness of a nuclear spin qudit through its uniform precession

Arjen Vaartjes, Martin Nurizzo, Lin Htoo Zaw +16

Spin precession is a textbook example of dynamics of a quantum system that exactly mimics its classical counterpart. Here we challenge this view by certifying the quantumness of ex…

quant-ph2024

Error-Mitigated Multi-Layer Quantum Routing

Wenbo Shi, Neel Kanth Kundu, Robert Malaney

Due to the numerous limitations of current quantum devices, quantum error mitigation methods become potential solutions for realizing practical quantum applications in the near ter…

quant-ph2024

Quantum Assemblage Tomography

Luis Villegas-Aguilar, Yuanlong Wang, Alex Pepper +7

A central requirement in asymmetric quantum nonlocality protocols, such as quantum steering, is the precise reconstruction of state assemblages -- statistical ensembles of quantum…

quant-ph2024★ 2 cited

Exploiting Spatial Diversity in Earth-to-Satellite Quantum-Classical Communications

Ziqing Wang, Timothy C. Ralph, Ryan Aguinaldo +1

Despite being an integral part of the vision of quantum Internet, Earth-to-satellite (uplink) quantum communications have been considered more challenging than their satellite-to-E…

quant-ph2024★ 9 cited

Classical and Quantum Frequency Combs for Satellite-based Clock Synchronization

Ronakraj K. Gosalia, Ryan Aguinaldo, Jonathan Green +3

The next generation of space-based networks will contain optical clocks embedded within satellites. To fully realize the capabilities of such clocks, high-precision clock synchroni…

quant-ph2024★ 11 cited

Optimal control of linear Gaussian quantum systems via quantum learning control

Yu-Hong Liu, Yexiong Zeng, Qing-Shou Tan +3

Efficiently controlling linear Gaussian quantum (LGQ) systems is a significant task in both the study of fundamental quantum theory and the development of modern quantum technology…

quant-ph2024★ 10 cited

A Room-Temperature Solid-State Maser Amplifier

Tom Day, Maya Isarov, William J. Pappas +6

Masers once represented the state-of-the-art in low noise microwave amplification technology, but eventually became obsolete due to their need for cryogenic cooling. Masers based o…

quant-ph2024★ 44 cited

Schrödinger cat states of a nuclear spin qudit in silicon

Xi Yu, Benjamin Wilhelm, Danielle Holmes +17

High-dimensional quantum systems are a valuable resource for quantum information processing. They can be used to encode error-correctable logical qubits, which has been demonstrate…

quant-ph2024★ 12 cited

Practical Few-Atom Quantum Reservoir Computing

Chuanzhou Zhu, Peter J. Ehlers, Hendra I. Nurdin +1

Quantum Reservoir Computing (QRC) harnesses quantum systems to tackle intricate computational problems with exceptional efficiency and minimized energy usage. This paper presents a…

quant-ph2024★ 9 cited

Classical-Quantum Dual Encoding for Laser Communications in Space

Matthew S. Winnel, Ziqing Wang, Robert Malaney +3

In typical laser communications classical information is encoded by modulating the amplitude of the laser beam and measured via direct detection. We add a layer of security using q…

quant-ph2024★ 34 cited

Grover's algorithm in a four-qubit silicon processor above the fault-tolerant threshold

Ian Thorvaldson, Dean Poulos, Christian M. Moehle +15

Spin qubits in silicon are strong contenders for realizing a practical quantum computer. This technology has made remarkable progress with the demonstration of single and two-qubit…

quant-ph2024

Error-Mitigated Quantum Random Access Memory

Wenbo Shi, Neel Kanth Kundu, Matthew R. McKay +1

As an alternative to quantum error correction, quantum error mitigation methods, including Zero-Noise Extrapolation (ZNE), have been proposed to alleviate run-time errors in curren…

quant-ph2024★ 58 cited

Room-temperature optically detected coherent control of molecular spins

Adrian Mena, Sarah K. Mann, Angus Cowley-Semple +5

Benefiting from both molecular tunability and versatile methods for deployment, optically interfaced molecular spins are a promising platform for quantum technologies such as sensi…

quant-ph2024★ 4 cited

Saturability of the Quantum Cramér-Rao Bound in Multiparameter Quantum Estimation at the Single-Copy Level

Hendra I. Nurdin

The quantum Cramér-Rao bound (QCRB) as the ultimate lower bound for precision in quantum parameter estimation is only known to be saturable in the multiparameter setting in special…

quant-ph2024★ 1 cited

Markovian Embeddings of Non-Markovian Quantum Systems: Coupled Stochastic and Quantum Master Equations for Non-Markovian Quantum Systems

Hendra I. Nurdin

Quantum Markov models are employed ubiquitously in quantum physics and in quantum information theory due to their relative simplicity and analytical tractability. In particular, th…