Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Transversal Injection: A method for direct encoding of ancilla states for non-Clifford gates using stabiliser codes
J. Gavriel, Daniel Herr, Alexis Shaw +3 more·Nov 18, 2022
Fault-tolerant, error-corrected quantum computation is commonly acknowledged to be crucial to the realisation of large-scale quantum algorithms that could lead to extremely impactful scientific or commercial results. Achieving a universal set of quan...
Iterative qubit coupled cluster using only clifford circuits
James Brown, Marc P. Coons, Erika Lloyd +4 more·Nov 18, 2022
The performance of quantum algorithms for ground-state energy estimation is directly impacted by the quality of the initial state, where quality is traditionally defined in terms of the overlap of the input state with the target state. An ideal state...
Magic of random matrix product states
Liyuan Chen, Roy J. Garcia, Kaifeng Bu +1 more·Nov 18, 2022
Magic, or nonstabilizerness, characterizes how far away a state is from the stabilizer states, making it an important resource in quantum computing, under the formalism of the Gotteman-Knill theorem. In this paper, we study the magic of the $1$-dimen...
A quantum-bit encoding converter
Tom Darras, B. Asenbeck, G. Guccione +3 more·Nov 18, 2022
A conversion of quantum information between single-photon and cat-state qubits is demonstrated by teleportation using optical hybrid entanglement. The classical limit of conversion is exceeded over the full Bloch sphere, with an average fidelity abov...
Applications of Quantum Annealing in Cryptography
Anpeng Zhang, Xiutao Feng·Nov 18, 2022
. This paper presents a new method to reduce the optimization of a pseudo-Boolean function to QUBO problem which can be solved by quantum annealer. The new method has two aspects, one is coefficient optimization and the other is variable optimization. ...
Scrambling and quantum teleportation
Museong Kim, Mi-Ra Hwang, Eylee Jung +1 more·Nov 18, 2022
Scrambling is a concept introduced from information loss problem arising in black hole. In this paper we discuss the effect of scrambling from a perspective of pure quantum information theory regardless of the information loss problem. We introduce 7...
Efficient quantum implementation of 2+1 U(1) lattice gauge theories with Gauss law constraints
Christopher Kane, D. Grabowska, B. Nachman +1 more·Nov 18, 2022
The study of real-time evolution of lattice quantum field theories using classical computers is known to scale exponentially with the number of lattice sites. Due to a fundamentally different computational strategy, quantum computers hold the promise o...
Acceptor-based qubit in silicon with tunable strain
Shihang Zhang, Yu He, Peihao Huang·Nov 18, 2022
Long coherence time and compatibility with semiconductor fabrication make spin qubits in silicon an attractive platform for quantum computing. In recent years, hole spin qubits are being developed as they have the advantages of weak coupling to nucle...
Digital Simulation of Projective Non-Abelian Anyons with 68 Superconducting Qubits
Shibo Xu, Zheng Sun, Ke Wang +31 more·Nov 17, 2022
Non-Abelian anyons are exotic quasiparticle excitations hosted by certain topological phases of matter. They break the fermion-boson dichotomy and obey non-Abelian braiding statistics: their interchanges yield unitary operations, rather than merely a...
Exact Quantum Algorithms for Quantum Phase Recognition: Renormalization Group and Error Correction
E. Lake, S. Balasubramanian, Soonwon Choi·Nov 17, 2022
We explore the relationship between renormalization-group (RG) flow and error correction by constructing quantum algorithms that exactly recognize one-dimensional symmetry-protected topological (SPT) phases protected by finite internal Abelian symmet...
Beating the break-even point with a discrete-variable-encoded logical qubit
Zhongchu Ni, Sai Li, Xiaowei Deng +12 more·Nov 17, 2022
Quantum error correction (QEC) aims to protect logical qubits from noises by using the redundancy of a large Hilbert space, which allows errors to be detected and corrected in real time^ 1 . In most QEC codes^ 2 – 8 , a logical qubit is encoded in so...
Dipolar spin-exchange and entanglement between molecules in an optical tweezer array
Yicheng Bao, Scarlett S. Yu, L. Anderegg +4 more·Nov 17, 2022
Ultracold polar molecules are promising candidate qubits for quantum computing and quantum simulations. Their long-lived molecular rotational states form robust qubits, and the long-range dipolar interaction between molecules provides quantum entangl...
Switching the function of the quantum Otto cycle in non-Markovian dynamics: Heat engine, heater, and heat pump
Miku Ishizaki, N. Hatano, H. Tajima·Nov 17, 2022
Quantum thermodynamics explores novel thermodynamic phenomena that emerge when interactions between macroscopic systems and microscopic quantum ones go into action. Among various issues, quantum heat engines, in particular, have attracted much attent...
Quantum approximate optimization algorithm parameter prediction using a convolutional neural network
Ningyi Xie, Xinwei Lee, DongSheng Cai +2 more·Nov 17, 2022
The Quantum approximate optimization algorithm (QAOA) is a quantum-classical hybrid algorithm aiming to produce approximate solutions for combinatorial optimization problems. In the QAOA, the quantum part prepares a quantum parameterized state that e...
A Parameter Setting Heuristic for the Quantum Alternating Operator Ansatz
James Sud, Stuart Hadfield, E. Rieffel +2 more·Nov 17, 2022
Parameterized quantum circuits are widely studied approaches to tackling challenging optimization problems. A prominent example is the Quantum Alternating Operator Ansatz (QAOA), a generalized approach that builds on the alternating structure of the ...
A (simple) classical algorithm for estimating Betti numbers
Simon Apers, Sayantan Sen, D'aniel Szab'o·Nov 17, 2022
<jats:p>We describe a simple algorithm for estimating the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>k</mml:mi></mml:math>-th normalized Betti number of a simplicial complex over <mml:math xmlns:mml="http://www.w3.org/1998/Math/...
Indistinguishable photons from an artificial atom in silicon photonics
Lukasz Komza, Polnop Samutpraphoot, Mutasem Odeh +8 more·Nov 17, 2022
Silicon is the ideal material for building electronic and photonic circuits at scale. Integrated photonic quantum technologies in silicon offer a promising path to scaling by leveraging advanced semiconductor manufacturing and integration capabilitie...
Feature selection through quantum annealing
Andrew Vlasic, Hunter Grant, Salvatore Certo·Nov 17, 2022
Feature selection is a technique in statistical prediction modeling that identifies features in a record with a strong statistical connection to the target variable. Excluding features with a weak statistical connection to the target variable in trai...
Synthesizing Quantum-Circuit Optimizers
Amanda Xu, A. Molavi, Lauren Pick +2 more·Nov 17, 2022
Near-term quantum computers are expected to work in an environment where each operation is noisy, with no error correction. Therefore, quantum-circuit optimizers are applied to minimize the number of noisy operations. Today, physicists are constantly...
Time-optimal control of two-level quantum systems by piecewise constant pulses
E. Dionis, D. Sugny·Nov 16, 2022
We apply an extension of the Pontryagin Maximum Principle to derive time-optimal controls of two-level quantum systems by means of piecewise constant pulses. Global optimal solutions are obtained for state-to-state transfer in the cases with one and ...