Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Maximal Entropy Approach for Quantum State Tomography
Rishabh Gupta, Rongxin Xia, R. Levine +1 more·Sep 2, 2020
Quantum computation has been growing rapidly in both theory and experiments. In particular, quantum computing devices with a large number of qubits have been developed by IBM, Google, IonQ, and others. The current quantum computing devices are noisy ...
Control and readout of a superconducting qubit using a photonic link
F. Lecocq, F. Quinlan, K. Cicak +3 more·Sep 2, 2020
Delivering on the revolutionary promise of a universal quantum computer will require processors with millions of quantum bits (qubits)1–3. In superconducting quantum processors4, each qubit is individually addressed with microwave signal lines that c...
Electronic structure with direct diagonalization on a D-wave quantum annealer
A. Teplukhin, B. Kendrick, S. Tretiak +1 more·Sep 2, 2020
Quantum chemistry is regarded to be one of the first disciplines that will be revolutionized by quantum computing. Although universal quantum computers of practical scale may be years away, various approaches are currently being pursued to solve quan...
On the origin of the controversial electrostatic field effect in superconductors
Ilia Golokolenov, A. Guthrie, S. Kafanov +2 more·Sep 1, 2020
Superconducting quantum devices offer numerous applications, from electrical metrology and magnetic sensing to energy-efficient high-end computing and advanced quantum information processing. The key elements of quantum circuits are (single and doubl...
Quantum information processing with bosonic qubits in circuit QED
Atharv Joshi, Kyungjoo Noh, Yvonne Y Gao·Aug 31, 2020
The unique features of quantum theory offer a powerful new paradigm for information processing. Translating these mathematical abstractions into useful algorithms and applications requires quantum systems with significant complexity and sufficiently ...
Arbitrary Measurement on Any Real-valued Probability Amplitude in Any Quantum System
Guanlei Xu·Aug 31, 2020
How to achieve an arbitrary real-valued probability amplitude in the general single-partite or multipartite quantum system without measuring any other quantum state's probability amplitude? How to achieve an arbitrary real-valued probability amplitud...
Trade-Offs on Number and Phase Shift Resilience in Bosonic Quantum Codes
Yingkai Ouyang, E. Campbell·Aug 28, 2020
Quantum codes typically rely on large numbers of degrees of freedom to achieve low error rates. However each additional degree of freedom introduces a new set of error mechanisms. Hence minimizing the degrees of freedom that a quantum code utilizes i...
A variational quantum algorithm for Hamiltonian diagonalization
Jinfeng Zeng, Chenfeng Cao, Chao Zhang +2 more·Aug 22, 2020
Hamiltonian diagonalization is at the heart of understanding physical properties and practical applications of quantum systems. It is highly desired to design quantum algorithms that can speedup Hamiltonian diagonalization, especially those can be im...
Mutual information-assisted adaptive variational quantum eigensolver
Zi-Jian Zhang, T. Kyaw, Jakob S. Kottmann +2 more·Aug 17, 2020
Adaptive construction of ansatz circuits offers a promising route towards applicable variational quantum eigensolvers on near-term quantum hardware. Those algorithms aim to build up optimal circuits for a certain problem and ansatz circuits are adapt...
Material platforms for defect qubits and single-photon emitters
Gang Zhang, Yuan Cheng, J. Chou +1 more·Aug 14, 2020
Quantum technology has grown out of quantum information theory and now provides a valuable tool that researchers from numerous fields can add to their toolbox of research methods. To date, various systems have been exploited to promote the applicatio...
Quantum verification of NP problems with single photons and linear optics
Aonan Zhang, H. Zhan, J. Liao +5 more·Aug 12, 2020
Quantum computing is seeking to realize hardware-optimized algorithms for application-related computational tasks. NP (nondeterministic-polynomial-time) is a complexity class containing many important but intractable problems like the satisfiability ...
Trusted center verification model and classical channel remote state preparation
T. Morimae, Yuki Takeuchi·Aug 11, 2020
The classical channel remote state preparation (ccRSP) is an important two-party primitive in quantum cryptography. Alice (classical polynomial-time) and Bob (quantum polynomial-time) exchange polynomial rounds of classical messages, and Bob finally ...
Anti- PT -symmetric qubit: Decoherence and entanglement entropy
Julia Cen, A. Saxena·Aug 11, 2020
We investigate a two-level spin system based anti-parity-time (anti-$\mathcal{PT}$)-symmetric qubit and study its decoherence as well as entanglement entropy properties. We compare our findings with that of the corresponding $\mathcal{PT}$-symmetric ...
Aggregating quantum networks
Nicolò Lo Piparo, M. Hanks, K. Nemoto +1 more·Aug 10, 2020
Quantum networking allows the transmission of information in ways unavailable in the classical world. Single packets of information can now be split and transmitted in a coherent way over different routes. This aggregation allows information to be tr...
Symmetry Breaking and Error Correction in Open Quantum Systems.
S. Lieu, R. Belyansky, Jeremy T. Young +3 more·Aug 6, 2020
Symmetry-breaking transitions are a well-understood phenomenon of closed quantum systems in quantum optics, condensed matter, and high energy physics. However, symmetry breaking in open systems is less thoroughly understood, in part due to the richer...
Investigating the Chinese postman problem on a quantum annealer
I. Siloi, V. Carnevali, Bibek Pokharel +2 more·Aug 6, 2020
The recent availability of quantum annealers has fueled a new area of information technology where such devices are applied to address practically motivated and computationally difficult problems with hardware that exploits quantum mechanical phenome...
A divide-and-conquer algorithm for quantum state preparation
Israel F. Araujo, D. Park, Francesco Petruccione +1 more·Aug 4, 2020
Advantages in several fields of research and industry are expected with the rise of quantum computers. However, the computational cost to load classical data in quantum computers can impose restrictions on possible quantum speedups. Known algorithms ...
Coarse-graining holographic states: A semiclassical flow in general spacetimes
Chitraang Murdia, Y. Nomura, Pratik Rath·Aug 4, 2020
© 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution o...
Processing Quantum Signals Carried by Electrical Currents
B. Roussel, C. Cabart, G. Fève +1 more·Aug 4, 2020
Recent developments in the coherent manipulation of electrons in ballistic conductors include the generation of time-periodic electrical currents involving one to few electronic excitations per period. However, using individual electrons as carrier o...
Cavity-enhanced broadband photonic Rabi oscillation
R. Ikuta, Toshiki Kobayashi, T. Yamazaki +2 more·Aug 4, 2020
A coherent coupling among different energy photons provided by nonlinear optical interaction is regarded as a photonic version of the Rabi oscillation. Cavity enhancement of the nonlinearity reduces energy requirement significantly and pushes the sca...