Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Efficient Quantum Network Communication Using Optimized Entanglement Swapping Trees
Mohammad Ghaderibaneh, Caitao Zhan, Himanshu Gupta +1 more·Dec 21, 2021
Quantum network communication is challenging, as the no-cloning theorem in the quantum regime makes many classical techniques inapplicable; in particular, the direct transmission of qubit states over long distances is infeasible due to unrecoverable ...
A χ²-based AlGaAs Phase Sensitive Amplifier with Record Gain, Noise and Sensitivity
Zhizhong Yan, Haoyu He, Han Liu +7 more·Dec 20, 2021
Phase sensitive amplifiers (PSAs) have the potential to empower substantial advances in emerging generations of optical communication systems as well as classical and quantum on-chip signal processing. While the second order nonlinearity (χ2) is stro...
Efficient Floating Point Arithmetic for Quantum Computers
Raphael Seidel, Nikolay Tcholtchev, Sebastian Bock +2 more·Dec 20, 2021
One of the major promises of quantum computing is the realization of SIMD (single instruction - multiple data) operations using the phenomenon of superposition. Since the dimension of the state space grows exponentially with the number of qubits, we ...
Measurement-based generation and preservation of cat and grid states within a continuous-variable cluster state
M. Eaton, C. González-Arciniegas, R. N. Alexander +2 more·Dec 20, 2021
We present an algorithm to reliably generate various quantum states critical to quantum error correction and universal continuous-variable (CV) quantum computing, such as Schrödinger cat states and Gottesman-Kitaev-Preskill (GKP) grid states, out of ...
Improved polar-code-based efficient post-processing algorithm for quantum key distribution
Jun-bin Fang, Zhengzhong Yi, Jin Li +5 more·Dec 20, 2021
Combined with one-time pad encryption scheme, quantum key distribution guarantees the unconditional security of communication in theory. However, error correction and privacy amplification in the post-processing phase of quantum key distribution resu...
Mitigation of Crosstalk Errors in a Quantum Measurement and Its Applications
Seungchan Seo, J. Seong, J. Bae·Dec 20, 2021
In practical realizations of quantum information processing, there may exist noise in a measurement readout stage where errors appear not only on individual qubits but also on multiple ones collectively, the latter of which is called crosstalk errors...
Sequential generation of multiphoton entanglement with a Rydberg superatom
Chao Yang, Yong Yu, Jun Li +3 more·Dec 17, 2021
Multiqubit entanglement is an indispensable resource for quantum information science. In particular, the entanglement of photons is of conceptual interest due to its implications in measurement-based quantum computing, communication and metrology. Th...
An introduction to quantum computing for statisticians and data scientists
A. Lopatnikova, Minh-Ngoc Tran, S. Sisson·Dec 13, 2021
Quantum computers promise to surpass the most powerful classical supercomputers when it comes to solving many critically important practical problems, such as pharmaceutical and fertilizer design, supply chain and traffic optimization, or optimizatio...
Dissipative quantum generative adversarial networks
Kerstin Beer, Gabriel Muller·Dec 11, 2021
Noisy intermediate-scale quantum (NISQ) devices build the first generation of quantum computers. Quantum neural networks (QNNs) gained high interest as one of the few suitable quantum algorithms to run on these NISQ devices. Most of the QNNs exploit ...
Hybrid quantum-classical multi-cut Benders approach with a power system application
N. Paterakis·Dec 10, 2021
Leveraging the current generation of quantum devices to solve optimization problems of practical interest necessitates the development of hybrid quantum-classical (HQC) solution approaches. In this paper, a multi-cut Benders decomposition (BD) approa...
A quantum processor based on coherent transport of entangled atom arrays
D. Bluvstein, H. Levine, G. Semeghini +9 more·Dec 7, 2021
The ability to engineer parallel, programmable operations between desired qubits within a quantum processor is key for building scalable quantum information systems1,2. In most state-of-the-art approaches, qubits interact locally, constrained by the ...
Quantum Annealing in the NISQ Era: Railway Conflict Management
K. Domino, M. Koniorczyk, K. Krawiec +3 more·Dec 7, 2021
We are in the noisy intermediate-scale quantum (NISQ) devices’ era, in which quantum hardware has become available for application in real-world problems. However, demonstrations of the usefulness of such NISQ devices are still rare. In this work, we...
Fundamental trade-off relation in probabilistic entanglement generation
Yuanbo Chen, Yoshihiko Hasegawa·Dec 6, 2021
We investigate the generation of entanglement between two non-interacting systems by synthesizing a new quantum process from the superposition of distinct processes characterized by local-only operations. Our analysis leads to the derivation of a uni...
Deterministic Generation of Multipartite Entanglement via Causal Activation in the Quantum Internet
Seid Koudia, A. Cacciapuoti, M. Caleffi·Dec 1, 2021
Entanglement represents “the” key resource for several applications of quantum information processing, ranging from quantum communications to distributed quantum computing. Despite its fundamental importance, deterministic generation of maximally ent...
Quantum search degeneration under amplitude noise in queries to the oracle
A. Rastegin, A. M. Shemet·Nov 29, 2021
We examine how amplitude noise in queries to the oracle degrades a performance of quantum search algorithm. The Grover search and similar techniques are widely used in various quantum algorithms, including cases where rival parties are fighting over ...
Error-immune quantum communication
Rajni Bala, V. Ravishankar·Nov 26, 2021
Environmental effects on the transmission of a state result, in general, in a change in the information carried by it. To mitigate this, many techniques such as quantum error–correcting codes, decoherence–free–subspaces [Rev Mod Phys, 88(4):041001, 2...
An Architecture for Meeting Quality-of-Service Requirements in Multi-User Quantum Networks
M. Skrzypczyk, S. Wehner·Nov 25, 2021
Quantum communication can enhance internet technology by enabling novel applications that are provably impossible classically. The successful execution of such applications relies on the generation of quantum entanglement between different users of t...
Generative Quantum Machine Learning
Christa Zoufal·Nov 24, 2021
The goal of generative machine learning is to model the probability distribution underlying a given data set. This probability distribution helps to characterize the generation process of the data samples. While classical generative machine learning ...
Quanto: optimizing quantum circuits with automatic generation of circuit identities
Jessica Pointing, Oded Padon, Zhihao Jia +4 more·Nov 22, 2021
Existing quantum compilers focus on mapping a logical quantum circuit to a quantum device and its native quantum gates. Only simple circuit identities are used to optimize the quantum circuit during the compilation process. This approach misses more ...
Dynamical Anyon Generation in Kitaev Honeycomb Non-Abelian Spin Liquids.
Yue Liu, K. Slagle, K. Burch +1 more·Nov 17, 2021
Relativistic Mott insulators known as "Kitaev materials" potentially realize spin liquids hosting non-Abelian anyons. Motivated by fault-tolerant quantum-computing applications in this setting, we introduce a dynamical anyon-generation protocol that ...