Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,591 papers in 12 months (-18% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Experimental deterministic correction of qubit loss
R. Stricker, D. Vodola, A. Erhard +7 more·Feb 21, 2020
The successful operation of quantum computers relies on protecting qubits from decoherence and noise, which—if uncorrected—will lead to erroneous results. Because these errors accumulate during an algorithm, correcting them is a key requirement for l...
Experimental computational advantage from superposition of multiple temporal orders of quantum gates
M. M. Taddei, J. Cariñe, D. Mart'inez +9 more·Feb 18, 2020
Advanced models for quantum computation where even the circuit connections are subject to the quantum superposition principle have been recently introduced. There, a control quantum system can coherently control the order in which a target quantum sy...
Room-temperature photonic logical qubits via second-order nonlinearities
Stefan Krastanov, M. Heuck, J. Shapiro +3 more·Feb 17, 2020
Recent progress in nonlinear optical materials and microresonators has brought quantum computing with bulk optical nonlinearities into the realm of possibility. This platform is of great interest, not only because photonics is an obvious choice for q...
Uncertainty and trade-offs in quantum multiparameter estimation
I. Kull, Philippe Allard Gu'erin, F. Verstraete·Feb 14, 2020
Uncertainty relations in quantum mechanics express bounds on our ability to simultaneously obtain knowledge about expectation values of non-commuting observables of a quantum system. They quantify trade-offs in accuracy between complementary pieces o...
Beyond Single-Shot Fault-Tolerant Quantum Error Correction
Nicolas Delfosse, B. Reichardt, K. Svore·Feb 12, 2020
Extensive quantum error correction is necessary in order to perform a useful computation on a noisy quantum computer. Moreover, quantum error correction must be implemented based on imperfect parity check measurements that may return incorrect outcom...
Algorithm for tailoring a quadratic lattice with a local squeezed reservoir to stabilize generic chiral states with nonlocal entanglement
Y. Yanay·Feb 12, 2020
We demonstrate a new approach to the generation of custom entangled many-body states through reservoir engineering, using the symmetry properties of bosonic lattice systems coupled to a local squeezed reservoir. We outline an algorithm where, beginni...
Identification of Symmetry-Protected Topological States on Noisy Quantum Computers.
Daniel Azses, R. Haenel, Y. Naveh +3 more·Feb 11, 2020
Identifying topological properties is a major challenge because, by definition, topological states do not have a local order parameter. While a generic solution to this challenge is not available yet, a broad class of topological states, namely, symm...
Discretizing quantum field theories for quantum simulation
Terry Farrelly, Julie Streich·Feb 7, 2020
To date, all proposed quantum algorithms for simulating quantum field theory (QFT) simulate (continuous-time) Hamiltonian lattice QFT as a stepping stone. Two overlooked issues are how large we can take the timestep in these simulations while getting...
Experimental quantum conference key agreement
Massimiliano Proietti, Joseph Ho, F. Grasselli +3 more·Feb 4, 2020
When Alice and Bob invite their friends, quantum key distribution with multiparty entanglement enables secure conference call. Quantum networks will provide multinode entanglement enabling secure communication on a global scale. Traditional quantum c...
Non-Pauli topological stabilizer codes from twisted quantum doubles
J. M. D. L. Fuente, N. Tarantino, J. Eisert·Jan 30, 2020
It has long been known that long-ranged entangled topological phases can be exploited to protect quantum information against unwanted local errors. Indeed, conditions for intrinsic topological order are reminiscent of criteria for faithful quantum er...
Single-site Rydberg addressing in 3D atomic arrays for quantum computing with neutral atoms
Xiao-Feng Shi·Jan 30, 2020
Neutral atom arrays are particularly promising for large-scale quantum computing because it is possible to prepare large-scale qubit arrays. An unsolved issue is how to selectively excite one qubit deep in a 3D atomic array to Rydberg states. In this...
On-chip deterministic operation of quantum dots in dual-mode waveguides for a plug-and-play single-photon source
R. Uppu, H. T. Eriksen, H. Thyrrestrup +9 more·Jan 29, 2020
A deterministic source of coherent single photons is an enabling device for quantum information processing. Quantum dots in nanophotonic structures have been employed as excellent sources of single photons with the promise of scaling up towards multi...
Intel Quantum Simulator: a cloud-ready high-performance simulator of quantum circuits
G. Guerreschi, J. Hogaboam, F. Baruffa +1 more·Jan 28, 2020
Classical simulation of quantum computers will continue to play an essential role in the progress of quantum information science, both for numerical studies of quantum algorithms and for modeling noise and errors. Here we introduce the latest release...
Temporal Information Processing on Noisy Quantum Computers
Jiayin Chen, H. Nurdin, N. Yamamoto·Jan 26, 2020
The combination of machine learning and quantum computing has emerged as a promising approach for addressing previously untenable problems. Reservoir computing is an efficient learning paradigm that utilizes nonlinear dynamical systems for temporal i...
Quantum Computation and Measurements from an Exotic Space-Time R4
M. Planat, Raymond Aschheim, Marcelo M. Amaral +1 more·Jan 22, 2020
The authors previously found a model of universal quantum computation by making use of the coset structure of subgroups of a free group G with relations. A valid subgroup H of index d in G leads to a ‘magic’ state ψ in d-dimensional Hilbert space tha...
Testing a quantum error-correcting code on various platforms.
Qihao Guo, Yuan-Yuan Zhao, M. Grassl +5 more·Jan 22, 2020
Quantum error correction plays an important role in fault-tolerant quantum information processing. It is usually difficult to experimentally realize quantum error correction, as it requires multiple qubits and quantum gates with high fidelity. Here w...
Causal and compositional structure of unitary transformations
Robin Lorenz, J. Barrett·Jan 21, 2020
The causal structure of a unitary transformation is the set of relations of possible influence between any input subsystem and any output subsystem. We study whether such causal structure can be understood in terms of compositional structure of the u...
Grover's Algorithm and Many-Valued Quantum Logic
Samuel Hunt, M. Gadouleau·Jan 17, 2020
As the engineering endeavour to realise quantum computers progresses, we consider that such machines need not rely on binary as their de facto unit of information. We investigate Grover's algorithm under a generalised quantum circuit model, in which ...
Quantum embeddings for machine learning
S. Lloyd, M. Schuld, Aroosa Ijaz +2 more·Jan 10, 2020
Quantum classifiers are trainable quantum circuits used as machine learning models. The first part of the circuit implements a quantum feature map that encodes classical inputs into quantum states, embedding the data in a high-dimensional Hilbert spa...
Real-time nanodiamond thermometry probing in vivo thermogenic responses
M. Fujiwara, Simo Sun, A. Dohms +12 more·Jan 9, 2020
Nanoparticle quantum temperature sensors detect subcellular heat generation in a multicellular model organism. Real-time temperature monitoring inside living organisms provides a direct measure of their biological activities. However, it is challengi...