Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Clifford-Deformed Compass Codes
Julie A. Campos, Kenneth R. Brown·Dec 5, 2024
We can design efficient quantum error-correcting (QEC) codes by tailoring them to our choice of quantum architecture. Useful tools for constructing such codes include Clifford deformations and appropriate gauge fixings of compass codes. In this work,...
Two-detector reconstruction of multiphoton states in linear optical networks
Tudor-Alexandru Isdrailva, Jun-Yi Wu·Dec 5, 2024
We propose a method for partial state reconstruction of multiphoton states in multimode ($N$-photon $M$-mode) linear optical networks (LONs) employing only two bucket photon-number-resolving (PNR) detectors. The reconstructed Heisenberg-Weyl-reduced ...
Double-Bracket Quantum Algorithms for Quantum Imaginary-Time Evolution.
M. Gluza, Jeongrak Son, Bi Hong Tiang +3 more·Dec 5, 2024
Efficiently preparing approximate ground states of large, strongly correlated systems on quantum hardware is challenging, and yet, nature is innately adept at this. This has motivated the study of thermodynamically inspired approaches to ground-state...
Boosting quantum annealing performance through direct polynomial unconstrained binary optimization
Sebastian Nagies, Kevin T. Geier, Javed Akram +3 more·Dec 5, 2024
Quantum annealing aims at solving optimization problems of practical relevance using quantum-computing hardware. Problems of interest are typically formulated in terms of quadratic unconstrained binary optimization (QUBO) Hamiltonians. However, many ...
Generating graph states with a single quantum emitter and the minimum number of fusions
M. C. Löbl, Love A. Pettersson, Andrew Jena +3 more·Dec 5, 2024
Graph states are the key resources for measurement- and fusion-based quantum computing with photons, yet their creation is experimentally challenging. We optimize a hybrid graph-state generation scheme using a single quantum emitter and linear optics...
Engineering qubit dynamics in open systems with photonic synthetic lattices
Francesco Di Colandrea, Tareq Jaouni, J. Grace +4 more·Dec 5, 2024
The evolution of a quantum system interacting with an environment can be described as a unitary process acting on both the system and the environment. In this framework, the system's evolution can be predicted by tracing out the environmental degrees...
Emergent unitary designs for encoded qubits from coherent errors and syndrome measurements
Zihan Cheng, Eric Huang, V. Khemani +2 more·Dec 5, 2024
Unitary $k$-designs are distributions of unitary gates that match the Haar distribution up to its $k$-th statistical moment. They are a crucial resource for randomized quantum protocols. However, their implementation on encoded logical qubits is nont...
Bayesian Quantum Amplitude Estimation
Alexandra Ramoa, Lu'is Paulo Santos·Dec 5, 2024
We present BAE, a problem-tailored and noise-aware Bayesian algorithm for quantum amplitude estimation. In a fault tolerant scenario, BAE is capable of saturating the Heisenberg limit; if device noise is present, BAE can dynamically characterize it a...
Device-independent prepare-and-prepare bipartite null witness dimension test with a single joint measurement
Josep Batle, Tomasz Białecki, Tomasz Rybotycki +1 more·Dec 4, 2024
We propose a device-independent null witness dimensionality test with bipartite measurements and input from two separate parties. The dimension is determined from the rank of the matrix of measurements for pairs of states prepared by the parties. We ...
A Novel Single-Layer Quantum Neural Network for Approximate SRBB-Based Unitary Synthesis
Giacomo Belli, Marco Mordacci, Michele Amoretti·Dec 4, 2024
In this work, a novel quantum neural network is introduced as a means to approximate any unitary evolution through the Standard Recursive Block Basis (SRBB) and is subsequently redesigned with the number of CNOTs asymptotically reduced by an exponent...
Variational quantum classifiers via a programmable photonic microprocessor
Hexiang Lin, Huihui Zhu, Zan Tang +7 more·Dec 4, 2024
Quantum computing holds promise across various fields, particularly with the advent of Noisy Intermediate-Scale Quantum (NISQ) devices, which can outperform classical supercomputers in specific tasks. However, challenges such as noise and limited qub...
Quantum circuit and mapping algorithms for wavepacket dynamics: case study of anharmonic hydrogen bonds in protonated and hydroxide water clusters
Debadrita Saha, Philip Richerme, S. Iyengar·Dec 4, 2024
The accurate computational study of wavepacket nuclear dynamics is considered to be a classically intractable problem, particularly with increasing dimensions. Here, we present two algorithms that, in conjunction with other methods developed by us, m...
Free-space model for a balloon-based quantum network
Ilektra Karakosta-Amarantidou, Raja Yehia, Matteo Schiavon·Dec 4, 2024
Long-distance communication is one of the main bottlenecks in the development of quantum communication networks. Free-space communication is a way to circumvent exponential fiber loss and to allow longer communication distances. Satellite nodes are t...
Universal distributed blind quantum computing with solid-state qubits.
Yan-Cheng Wei, P. Stas, A. Suleymanzade +16 more·Dec 4, 2024
Blind quantum computing is a promising application of distributed quantum systems, in which a client can perform computations on a remote server without revealing any details of the applied circuit. Although the most promising realizations of quantum...
BOSS: Blocking algorithm for optimizing shuttling scheduling in Ion Trap
Xian Wu, Chenghong Zhu, Jingbo Wang +1 more·Dec 4, 2024
Ion traps stand at the forefront of quantum hardware technology, presenting unparalleled benefits for quantum computing, such as high-fidelity gates, extensive connectivity, and prolonged coherence times. In this context, we explore the critical role...
MLQM: Machine Learning Approach for Accelerating Optimal Qubit Mapping
Wenjie Sun, Xiaoyu Li, Lianhui Yu +3 more·Dec 4, 2024
Quantum circuit mapping is a critical process in quantum computing that involves adapting logical quantum circuits to adhere to hardware constraints, thereby generating physically executable quantum circuits. Current quantum circuit mapping technique...
Impact of dephased entangled states and varying measurement orientations on the reliability of cryptographic keys generated via the quantum protocol E91: A quantum simulation approach
Adri'an F. Hern'andez-Borda, Mar'ia P. Rojas-Sep'ulveda, Hanz Y. Ram'irez-G'omez·Dec 4, 2024
One of the main requirements to achieve reliable quantum communications are on-demand sources of highly entangled photon pairs, and semiconductor quantum dots have emerged as prominent candidates to satisfy the necessary conditions of brightness and ...
Pauli quantum computing: $I$ as $|0\rangle$ and $X$ as $|1\rangle$
Zhong-Xia Shang·Dec 4, 2024
We propose a new quantum computing formalism named Pauli quantum computing. In this formalism, we use the Pauli basis $I$ and $X$ on the non-diagonal blocks of density matrices to encode information and treat them as the computational basis $|0\rangl...
Single photonic qutrit in a collective Rydberg polariton
Y. Jiao, Oliver D. W. Hughes, Max Z. Festenstein +5 more·Dec 4, 2024
Qutrit with highly efficient algorithms and security is imperative in quantum information processing. Here, we demonstrate for the first time the coherent creation, control, and readout of a single photonic qutrit in a cold Rydberg ensemble. In each ...
Demonstration of a quantum C-NOT Gate in a Time-Multiplexed fully reconfigurable photonic processor
Federico Pegoraro, Philip Held, Jonas Lammers +2 more·Dec 3, 2024
The two-qubit controlled-not (C-NOT) gate is an essential component for gate-based quantum circuits. In fact, its operation, combined with single qubit rotations allows to realise any quantum circuit. Several strategies have been adopted in order to ...