Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,509 papers in 12 months (-19% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Simultaneous single-qubit driving of semiconductor spin qubits at the fault-tolerant threshold
W. Lawrie, M. Rimbach-Russ, F. V. Riggelen +6 more·Sep 16, 2021
Practical Quantum computing hinges on the ability to control large numbers of qubits with high fidelity. Quantum dots define a promising platform due to their compatibility with semiconductor manufacturing. Moreover, high-fidelity operations above 99...
Continuous-variable quantum repeaters based on bosonic error-correction and teleportation: architecture and applications
Bo-Han Wu, Zheshen Zhang, Quntao Zhuang·Sep 15, 2021
Quantum repeater is an essential ingredient for quantum networks that link distant quantum modules such as quantum computers and sensors. Motivated by distributed quantum computing and communication, quantum repeaters that relay discrete-variable qua...
A thorough introduction to non-relativistic matrix mechanics in multi-qudit systems with a study on quantum entanglement and quantum quantifiers
Lucas Camponogara Viera, Shujian Liao·Sep 14, 2021
Quantum computing is among the most far-reaching technologies of the 21st century, tackling challenges at the cutting edge of physics. This new paradigm in computer science harnesses quantum entanglement, one striking non-intuitive feature of quantum...
Noise-resistant quantum state compression readout
Chen Ding, Xiao-Yue Xu, Yun-Fei Niu +3 more·Sep 14, 2021
Qubit measurement is generally the most error-prone operation that degrades the performance of near-term quantum devices, and the exponential decay of readout fidelity severely impedes the development of large-scale quantum information processing. Gi...
A universal qudit quantum processor with trapped ions
M. Ringbauer, M. Meth, L. Postler +4 more·Sep 14, 2021
Most quantum computers use binary encoding to store information in qubits—the quantum analogue of classical bits. Yet, the underlying physical hardware consists of information carriers that are not necessarily binary, but typically exhibit a rich mul...
Distilling GHZ States using Stabilizer Codes
Narayanan Rengaswamy, Ankur Raina, Nithin Raveendran +1 more·Sep 13, 2021
Entanglement distillation is a well-studied problem in quantum information, where one typically starts with n noisy Bell pairs and distills k Bell pairs of higher fidelity. While distilling Bell pairs is the canonical setting, it is important to study...
Towards a variational Jordan–Lee–Preskill quantum algorithm
Junyu Liu, Zimu Li, Han Zheng +2 more·Sep 12, 2021
Rapid developments of quantum information technology show promising opportunities for simulating quantum field theory in near-term quantum devices. In this work, we formulate the theory of (time-dependent) variational quantum simulation of the 1+1 di...
A low-power integrated magneto-optic modulator on silicon for cryogenic applications
P. Pintus, L. Ranzani, S. Pinna +9 more·Sep 9, 2021
A fundamental challenge of the quantum revolution is to efficiently interface the quantum computing systems operating at cryogenic temperatures with room temperature electronics and media for high data-rate communication. Current approaches to contro...
On-Demand Source of Dual-Rail Photon Pairs Based on Chiral Interaction in a Nanophotonic Waveguide
Freja T. Østfeldt, Eva M. Gonz'alez-Ruiz, Nils V. Hauff +8 more·Sep 8, 2021
Entanglement is the fuel of advanced quantum technology. It is for instance consumed in measurement-based quantum computing and allows loss-tolerant encoding of quantum information. In photonics, entanglement has traditionally been generated probabil...
Dephasing of Exchange‐Coupled Spins in Quantum Dots for Quantum Computing
Peihao Huang·Sep 6, 2021
A spin qubit in semiconductor quantum dots holds promise for quantum information processing for scalability and long coherence time. An important semiconductor qubit system is a double quantum dot trapping two electrons or holes, whose spin states en...
Quantum kernels to learn the phases of quantum matter
Teresa Sancho-Lorente, Juan Rom'an-Roche, D. Zueco·Sep 6, 2021
Classical machine learning has succeeded in the prediction of both classical and quantum phases of matter. Notably, kernel methods stand out for their ability to provide interpretable results, relating the learning process with the physical order par...
Quantum Communication Using Semiconductor Quantum Dots
Daniel A. Vajner, L. Rickert, T. Gao +2 more·Aug 31, 2021
Worldwide, enormous efforts are directed toward the development of the so‐called quantum internet. Turning this long‐sought‐after dream into reality is a great challenge that will require breakthroughs in quantum communication and computing. To estab...
Fast generation of cat states in Kerr nonlinear resonators via optimal adiabatic control
Jiao-Jiao Xue, Kenny Yu, Wenxiao Liu +2 more·Aug 30, 2021
Macroscopic cat states have been widely studied to illustrate fundamental principles of quantum physics as well as their applications in quantum information processing. In this paper, we propose a quantum speed-up method for the creation of cat state...
Identifying optimal cycles in quantum thermal machines with reinforcement-learning
P. A. Erdman, Frank Noé·Aug 30, 2021
The optimal control of open quantum systems is a challenging task but has a key role in improving existing quantum information processing technologies. We introduce a general framework based on reinforcement learning to discover optimal thermodynamic...
Quantum Sub-Gaussian Mean Estimator
Yassine Hamoudi·Aug 27, 2021
We present a new quantum algorithm for estimating the mean of a real-valued random variable obtained as the output of a quantum computation. Our estimator achieves a nearly-optimal quadratic speedup over the number of classical i.i.d. samples needed ...
All-optical cat-code quantum error correction
Jacob Hastrup, U. Andersen·Aug 27, 2021
The cat code is a promising encoding scheme for bosonic quantum error correction as it allows for correction against losses--the dominant error mechanism in most bosonic systems. However, for losses to be detected efficiently without disturbing the e...
Assessing the Needs of the Quantum Industry
Ciaran Hughes, Doug Finke, Dan-Adrian German +3 more·Aug 25, 2021
Background: Quantum information science and technology (QIST) has progressed significantly in the last decade, such that it is no longer solely in the domain of research labs, but is now beginning to be developed for, and applied in, industrial appli...
EQUAL: Improving the Fidelity of Quantum Annealers by Injecting Controlled Perturbations
Ramin Ayanzadeh, Poulami Das, Swamit S. Tannu +1 more·Aug 24, 2021
Quantum computing is an information processing paradigm that uses quantum-mechanical properties to speedup computationally hard problems. Gate-based quantum computers and Quantum Annealers (QAs) are two commercially available hardware platforms that ...
Autonomous Estimation of High-Dimensional Coulomb Diamonds from Sparse Measurements
A. Chatterjee, Fabio Ansaloni, Torbjørn Rasmussen +5 more·Aug 24, 2021
Quantum dot arrays possess ground states governed by Coulomb energies, utilized prominently by singly occupied quantum dots, each implementing a spin qubit. For such quantum processors, the controlled transitions between ground states are of operatio...
Probabilistic computing with p-bits
J. Kaiser, S. Datta·Aug 22, 2021
Digital computers store information in the form of bits that can take on one of two values 0 and 1, while quantum computers are based on qubits that are described by a complex wavefunction, whose squared magnitude gives the probability of measuring e...