Showing 2023 · quant-phShow all

24 papers · 2 filters

quant-ph2023★ 3 cited

Unifying non-Markovian characterisation with an efficient and self-consistent framework

Gregory A. L. White, Petar Jurcevic, Charles D. Hill +1

Noise on quantum devices is much more complex than it is commonly given credit. Far from usual models of decoherence, nearly all quantum devices are plagued both by a continuum of…

quant-ph2023★ 6 cited

Selective Single and Double-Mode Quantum Limited Amplifier

Abdul Mohamed, Elham Zohari, Jarryd J. Pla +2

A quantum-limited amplifier enables the amplification of weak signals while introducing minimal noise dictated by the principles of quantum mechanics. These amplifiers serve a broa…

quant-ph2023★ 14 cited

Real-time feedback protocols for optimizing fault-tolerant two-qubit gate fidelities in a silicon spin system

Nard Dumoulin Stuyck, Amanda E. Seedhouse, Santiago Serrano +10

Recently, several groups have demonstrated two-qubit gate fidelities in semiconductor spin qubit systems above 99%. Achieving this regime of fault-tolerant compatible high fideliti…

quant-ph2023★ 7 cited

Quantum autoencoders using mixed reference states

Hailan Ma, Gary J. Mooney, Ian R. Petersen +2

One of the fundamental tasks in quantum information theory is quantum data compression, which can be realized via quantum autoencoders that first compress quantum states to low-dim…

quant-ph2023★ 18 cited

Tomography of entangling two-qubit logic operations in exchange-coupled donor electron spin qubits

Holly G. Stemp, Serwan Asaad, Mark R. van Blankenstein +19

Scalable quantum processors require high-fidelity universal quantum logic operations in a manufacturable physical platform. Donors in silicon provide atomic size, excellent quantum…

quant-ph2023★ 3 cited

Wavelet correlation noise analysis for qubit operation variable time series

Amanda E. Seedhouse, Nard Dumoulin Stuyck, Santiago Serrano +10

In quantum computing, characterizing the full noise profile of qubits can aid in increasing coherence times and fidelities by developing error-mitigating techniques specific to the…

quant-ph2023★ 11 cited

Nonlocality activation in a photonic quantum network

Luis Villegas-Aguilar, Emanuele Polino, Farzad Ghafari +9

Bell nonlocality refers to correlations between two distant, entangled particles that challenge classical notions of local causality. Beyond its foundational significance, nonlocal…

quant-ph2023★ 100 cited

High-fidelity operation and algorithmic initialisation of spin qubits above one kelvin

Jonathan Y. Huang, Rocky Y. Su, Wee Han Lim +23

The encoding of qubits in semiconductor spin carriers has been recognised as a promising approach to a commercial quantum computer that can be lithographically produced and integra…

quant-ph2023★ 18 cited

Two-step feedback preparation of entanglement for qubit systems with time delay

Yanan Liu, Daoyi Dong, Sen Kuang +2

Quantum entanglement plays a fundamental role in quantum computation and quantum communication. Feedback control has been widely used in stochastic quantum systems to generate give…

quant-ph2023★ 6 cited

Fault-tolerant control for optical parametric oscillators with pumping fluctuations

Yanan Liu, Daoyi Dong, Ian R. Petersen +1

Optical Parametric Oscillators (OPOs) have wide applications in quantum optics for generating squeezed states and developing advanced technologies. When the phase or/and the amplit…

quant-ph2023★ 9 cited

Error channels in quantum nondemolition measurements on spin systems

Benjamin Joecker, Holly G. Stemp, Irene Fernández de Fuentes +2

Quantum nondemolition (QND) measurements are a precious resource for quantum information processing. Repetitive QND measurements can boost the fidelity of qubit preparation and mea…

quant-ph2023

Equilibration of Non-interacting Photons and Quantum Signatures of Chaos

V. M. Bastidas, H. L. Nourse, A. Sakurai +4

Equilibration plays a fundamental role in our understanding of statistical mechanics and the long-time dynamics of many-body systems. In quantum systems, the route to equilibration…

quant-ph2023★ 5 cited

Characterizing non-Markovian Quantum Process by Fast Bayesian Tomography

R. Y. Su, J. Y. Huang, N. Dumoulin. Stuyck +15

To push gate performance to levels beyond the thresholds for quantum error correction, it is important to characterize the error sources occurring on quantum gates. However, the ch…

quant-ph2023★ 48 cited

Navigating the 16-dimensional Hilbert space of a high-spin donor qudit with electric and magnetic fields

Irene Fernández de Fuentes, Tim Botzem, Mark A. I. Johnson +11

Efficient scaling and flexible control are key aspects of useful quantum computing hardware. Spins in semiconductors combine quantum information processing with electrons, holes or…

quant-ph2023★ 14 cited

Single-Step Parity Check Gate Set for Quantum Error Correction

Gözde Üstün, Andrea Morello, Simon Devitt

A key requirement for an effective Quantum Error Correction (QEC) scheme is that the physical qubits have error rates below a certain threshold. The value of this threshold depends…

quant-ph2023★ 5 cited

Quantum Super-Resolution with Balanced Homodyne Detection in Low-Earth-Orbit

Ronakraj K Gosalia, Robert Malaney, Ryan Aguinaldo +1

Quantum super-resolution involves resolving two sources below the Rayleigh limit using quantum optics. Such a technique would allow high-precision inter-satellite positioning and t…

quant-ph2023★ 4 cited

Phase Correction using Deep Learning for Satellite-to-Ground CV-QKD

Nathan K. Long, Robert Malaney, Kenneth J. Grant

Coherent measurement of quantum signals used for continuous-variable (CV) quantum key distribution (QKD) across satellite-to-ground channels requires compensation of phase wavefron…

quant-ph2023★ 2 cited

Error-Mitigated Quantum Routing on Noisy Devices

Wenbo Shi, Robert Malaney

With sub-threshold quantum error correction on quantum hardware still out of reach, quantum error mitigation methods are currently deemed an attractive option for implementing cert…

quant-ph2023★ 5 cited

LEO Clock Synchronization with Entangled Light

Ronakraj Gosalia, Robert Malaney, Ryan Aguinaldo +2

Precision navigation and timing, very-long-baseline interferometry, next-generation communication, sensing, and tests of fundamental physics all require a highly synchronized netwo…

quant-ph2023★ 13 cited

Robust Macroscopic Schrödinger's Cat on a Nucleus

Pragati Gupta, Arjen Vaartjes, Xi Yu +2

We propose a scheme to generate spin cat states, i.e., superpositions of maximally separated quasiclassical states on a single high-dimensional nuclear spin in a solid-state device…

quant-ph2023

Protecting Classical-Quantum Signals in Free Space Optical Channels

E. Villaseñor, M. S. Winnel, T. C. Ralph +3

Due to turbulence and tracking errors, free-space optical channels involving mobile transceivers are characterized by a signal's partial loss or complete erasure. This work present…

quant-ph2023★ 2 cited

Accessing the Full Capabilities of Filter Functions: A Tool for Detailed Noise and Control Susceptibility Analysis

Ingvild Hansen, Amanda E. Seedhouse, Andre Saraiva +2

The filter function formalism from quantum control theory is typically used to determine the noise susceptibility of pulse sequences by looking at the overlap between the filter fu…

quant-ph2023★ 25 cited

Bounds to electron spin qubit variability for scalable CMOS architectures

Jesús D. Cifuentes, Tuomo Tanttu, Will Gilbert +21

Spins of electrons in CMOS quantum dots combine exquisite quantum properties and scalable fabrication. In the age of quantum technology, however, the metrics that crowned Si/SiO2 a…

quant-ph2023★ 55 cited

Assessment of error variation in high-fidelity two-qubit gates in silicon

Tuomo Tanttu, Wee Han Lim, Jonathan Y. Huang +24

Achieving high-fidelity entangling operations between qubits consistently is essential for the performance of multi-qubit systems and is a crucial factor in achieving fault-toleran…