Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Fermionic quantum processing with programmable neutral atom arrays
Daniel Gonz'alez-Cuadra, D. Bluvstein, M. Kalinowski +10 more·Mar 13, 2023
Significance Neutral atoms trapped in tweezer arrays have recently emerged as powerful quantum simulation platforms, with recent experiments targeting quantum spin models. In this work, we envision the next generation of programmable atomic quantum s...
Significant improvement of fidelity for encoded quantum bell pairs at long and short-distance communication along with generalized circuit
Syed Emad Uddin Shubha, MD Saifur Rahman, Mahdy M.R.C·Mar 13, 2023
Quantum entanglement is a unique criterion of the quantum realm and an essential tool to secure quantum communication. Ensuring high-fidelity entanglement has always been a challenging task owing to interaction with the hostile channel environment cr...
Automatic Generation of an Efficient Less-Than Oracle for Quantum Amplitude Amplification
Javier Sanchez-Rivero, Daniel Talav'an, J. García-Alonso +2 more·Mar 13, 2023
Grover's algorithm is a well-known contribution to quantum computing. It searches one value within an unordered sequence faster than any classical algorithm. A fundamental part of this algorithm is the so-called oracle, a quantum circuit that marks t...
A quantum spectral method for simulating stochastic processes, with applications to Monte Carlo
Adam Bouland, A. Dandapani, A. Prakash·Mar 12, 2023
Stochastic processes play a fundamental role in physics, mathematics, engineering and finance. One potential application of quantum computation is to better approximate properties of stochastic processes. For example, quantum algorithms for Monte Car...
Simulating non-unitary dynamics using quantum signal processing with unitary block encoding
H. Chan, D. M. Ramo, Nathan Fitzpatrick·Mar 10, 2023
We adapt a recent advance in resource-frugal quantum signal processing - the Quantum Eigenvalue Transform with Unitary matrices (QET-U) - to explore non-unitary imaginary time evolution on early fault-tolerant quantum computers using exactly emulated...
Adaptive quantum error mitigation using pulse-based inverse evolutions
Ivan Henao, Jader P. Santos, R. Uzdin·Mar 9, 2023
Quantum Error Mitigation (QEM) enables the extraction of high-quality results from the presently-available noisy quantum computers. In this approach, the effect of the noise on observables of interest can be mitigated using multiple measurements with...
Quantum-enhanced greedy combinatorial optimization solver
M. Dupont, B. Evert, Mark Hodson +13 more·Mar 9, 2023
Combinatorial optimization is a broadly attractive area for potential quantum advantage, but no quantum algorithm has yet made the leap. Noise in quantum hardware remains a challenge, and more sophisticated quantum-classical algorithms are required t...
Absorbing state phase transition with Clifford circuits
Nastasia Makki, Nicolai Lang, H. Büchler·Mar 9, 2023
The role of quantum fluctuations in modifying the critical behavior of non-equilibrium phase transitions is a fundamental but unsolved question. In this study, we examine the absorbing state phase transition of a 1D chain of qubits undergoing a conta...
Realization of quantum signal processing on a noisy quantum computer
Y. Kikuchi, Conor Mc Keever, Luuk Coopmans +2 more·Mar 9, 2023
Quantum signal processing (QSP) is a powerful toolbox for the design of quantum algorithms and can lead to asymptotically optimal computational costs. Its realization on noisy quantum computers without fault tolerance, however, is challenging because...
Optimizing quantum noise-induced reservoir computing for nonlinear and chaotic time series prediction
D. Fry, Amol Deshmukh, Samuel Yen-Chi Chen +2 more·Mar 9, 2023
Quantum reservoir computing is strongly emerging for sequential and time series data prediction in quantum machine learning. We make advancements to the quantum noise-induced reservoir, in which reservoir noise is used as a resource to generate expre...
Adiabatic elimination for composite open quantum systems: Reduced-model formulation and numerical simulations
François-Marie Le Régent, Pierre Rouchon·Mar 9, 2023
A numerical method is proposed for simulation of composite open quantum systems. It is based on Lindblad master equations and adiabatic elimination. Each subsystem is assumed to converge exponentially towards a stationary subspace, slightly impacted ...
Modular decoding: parallelizable real-time decoding for quantum computers
H'ector Bomb'in, C. Dawson, Ye-Hua Liu +3 more·Mar 8, 2023
Universal fault-tolerant quantum computation will require real-time decoding algorithms capable of quickly extracting logical outcomes from the stream of data generated by noisy quantum hardware. We propose modular decoding, an approach capable of ad...
Quantum simulation of colour in perturbative quantum chromodynamics
Herschel A. Chawdhry, M. Pellen·Mar 8, 2023
Quantum computers are expected to give major speed-ups for the simulation of quantum systems. In this work, we present quantum gates that simulate the colour part of the interactions of quarks and gluons in perturbative quantum chromodynamics (QCD). ...
Measurement-induced entanglement and teleportation on a noisy quantum processor
Jesse C. Hoke, Matteo Ippoliti, D. Abanin +160 more·Mar 8, 2023
Measurement has a special role in quantum theory^ 1 : by collapsing the wavefunction, it can enable phenomena such as teleportation^ 2 and thereby alter the ‘arrow of time’ that constrains unitary evolution. When integrated in many-body dynamics, mea...
Direct pulse-level compilation of arbitrary quantum logic gates on superconducting qutrits
Yu-Hung Cho, K. Beck, A. Castelli +4 more·Mar 7, 2023
Advanced simulations and calculations on quantum computers require high-fidelity implementations of quantum operations. The universal gateset approach builds complex unitaries from a small set of primitive gates, often resulting in a long gate sequen...
Quantum Computation via Multiport Quantum Fourier Optical Processors
Mohammad Rezai, J. Salehi·Mar 7, 2023
The light's image is the primary source of information carrier in nature. Indeed, a single photon's image possesses a vast information capacity that can be harnessed for quantum information processing. Our scheme for implementing quantum information ...
Towards practical and massively parallel quantum computing emulation for quantum chemistry
Honghui Shang, Yi Fan, Limei Shen +5 more·Mar 7, 2023
Quantum computing is moving beyond its early stage and seeking for commercial applications in chemical and biomedical sciences. In the current noisy intermediate-scale quantum computing era, the quantum resource is too scarce to support these explora...
Variational quantum state discriminator for supervised machine learning
Dongkeun Lee, Kyunghyun Baek, Joonsuk Huh +1 more·Mar 7, 2023
Quantum state discrimination (QSD) is a fundamental task in quantum information processing with numerous applications. We present a variational quantum algorithm that performs the minimum-error QSD, called the variational quantum state discriminator ...
Tensor network reduced order models for wall-bounded flows
M. Kiffner, D. Jaksch·Mar 6, 2023
We introduce a widely applicable tensor network-based framework for developing reduced order models describing wall-bounded fluid flows. As a paradigmatic example, we consider the incompressible Navier-Stokes equations and the lid-driven cavity in tw...
Requirements for upgrading trusted nodes to a repeater chain over 900 km of optical fiber
Francisco Ferreira da Silva, G. Avis, J. Slater +1 more·Mar 6, 2023
We perform a numerical study of the distribution of entanglement on a real-world fiber grid connecting the German cities of Bonn and Berlin. The connection is realized using a chain of processing-node quantum repeaters spanning roughly 900 kilometers...