Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Realizing quantum linear regression with auxiliary qumodes
Dan-Bo Zhang, Z. Xue, Shi-Liang Zhu +1 more·Aug 27, 2018
In order to exploit quantum advantages, quantum algorithms are indispensable for operating machine learning with quantum computers. We here propose an intriguing hybrid approach of quantum information processing for quantum linear regression, which u...
Driven tabu search: a quantum inherent optimisation
C. Silva, I. Dutra, Marc Dahlem·Aug 25, 2018
Quantum computers are different from binary digital electronic computers based on transistors. Common digital computing encodes the data into binary digits (bits), each of which is always in one of two definite states (0 or 1), quantum computation us...
Superconducting circuit quantum computing with nanomechanical resonators as storage
M. Pechal, Patricio Arrangoiz-Arriola, A. Safavi-Naeini·Aug 24, 2018
We analyze the quantum information processing capability of a superconducting transmon circuit used to mediate interactions between quantum information stored in a collection of phononic crystal cavity resonators. Having only a single processing elem...
Logical measurement-based quantum computation in circuit-QED
J. Joo, Chang-Woo Lee, S. Kono +1 more·Aug 23, 2018
We propose a new scheme of measurement-based quantum computation (MBQC) using an error-correcting code against photon-loss in circuit quantum electrodynamics. We describe a specific protocol of logical single-qubit gates given by sequential cavity me...
Unitary entanglement construction in hierarchical networks.
A. Bapat, Zachary Eldredge, J. Garrison +3 more·Aug 23, 2018
The construction of large-scale quantum computers will require modular architectures that allow physical resources to be localized in easy-to-manage packages. In this work we examine the impact of different graph structures on the preparation of enta...
Demonstration of Slow Light in a Rubidium Vapour Using Single Photons from a Trapped Ion
J. Siverns, J. Hannegan, Q. Quraishi·Aug 23, 2018
Practical implementation of quantum networks are likely to interface different types of quantum systems. When photonic interconnects link the systems together, they must preserve the quantum properties of the photon. These light-matter interfaces may...
Experimental cryptographic verification for near-term quantum cloud computing.
Xi Chen, Bin Cheng, Zhaokai Li +4 more·Aug 22, 2018
An important task for quantum cloud computing is to make sure that there is a real quantum computer running, instead of classical simulation. Here we explore the applicability of a cryptographic verification scheme for verifying quantum cloud computi...
Parity-Assisted Generation of Nonclassical States of Light in Circuit Quantum Electrodynamics
F. A. Cárdenas-López, G. Romero, L. Lamata +2 more·Aug 21, 2018
We propose a method to generate nonclassical states of light in multimode microwave cavities. Our approach considers two-photon processes that take place in a system composed of N extended cavities and an ultrastrongly coupled light–matter system. Un...
Low overhead quantum computation using lattice surgery
A. Fowler, C. Gidney·Aug 20, 2018
When calculating the overhead of a quantum algorithm made fault-tolerant using the surface code, many previous works have used defects and braids for logical qubit storage and state distillation. In this work, we show that lattice surgery reduces the...
Nonsignaling causal hierarchy of general multisource networks
M. Luo·Aug 20, 2018
Large-scale multisource networks have been employed to overcome the practical constraints that entangled systems are difficult to faithfully transmit over large distance or store in long time. However, a full characterization of the multipartite nonl...
Large-scale silicon quantum photonics implementing arbitrary two-qubit processing
X. Qiang, Xiaoqi Zhou, Jianwei Wang +11 more·Aug 20, 2018
Photonics is a promising platform for implementing universal quantum information processing. Its main challenges include precise control of massive circuits of linear optical components and effective implementation of entangling operations on photons...
A programmable two-qubit solid-state quantum processor under ambient conditions
Yang Wu, Ya Wang, X. Qin +2 more·Aug 17, 2018
Quantum computers, which take advantage of the superposition and entanglement of physical states, could outperform their classical counterparts in solving problems with technological impact such as factoring large numbers and searching databases. A q...
Measurement of GHZ and cluster state entanglement monotones in transmon qubits
Amara Katabarwa, M. Geller·Aug 15, 2018
Experimental detection of entanglement in superconducting qubits has been mostly limited, for more than two qubits, to witness-based and related approaches that can certify the presence of some entanglement, but not rigorously quantify how much. Here...
Neural-network states for the classical simulation of quantum computing
Bjarni J'onsson, B. Bauer, Giuseppe Carleo·Aug 15, 2018
Simulating quantum algorithms with classical resources generally requires exponential resources. However, heuristic classical approaches are often very efficient in approximately simulating special circuit structures, for example with limited entangl...
Locality and Digital Quantum Simulation of Power-Law Interactions
Minh C. Tran, Andrew Y. Guo, Yuan Su +5 more·Aug 15, 2018
The propagation of information in nonrelativistic quantum systems obeys a speed limit known as a Lieb-Robinson bound. We derive a new Lieb-Robinson bound for systems with interactions that decay with distance r as a power law, 1/rα. The bound implies...
Multiqubit matter-wave interferometry under decoherence and the Heisenberg scaling recovery
Yanming Che, Jing Liu, X.-M. Lu +1 more·Aug 14, 2018
Most matter-wave interferometry (MWI) schemes for quantum sensing have so far been evaluated in ideal situations without noise. In this work, we provide assessments of generic multiqubit MWI schemes under Markovian dephasing noise. We find that, for ...
Geometry and symmetry in the quantum Boltzmann machine
Hai-jing Song, T. Song, Qi-Kai He +2 more·Aug 14, 2018
Quantum Boltzmann machine extends the classical Boltzmann machine learning to the quantum regime, which makes its power to simulate the quantum states beyond the classical probability distributions. We develop the BFGS algorithm to study the correspo...
Epsilon-Near-Zero Quantum Networks
L. Vertchenko, N. Akopian, A. Lavrinenko·Aug 13, 2018
Realization of an on-chip quantum network is a major goal in the field of integrated quantum photonics. A typical network scalable on-chip demands optical integration of single photon sources, optical circuitry and detectors for routing and processin...
Benchmarks for approximate CNOTs based on a 17-Qubit Surface Code
Andreas Peter, D. Loss, James R. Wootton·Aug 12, 2018
Scalable and fault-tolerant quantum computation will require error correction. This will demand constant measurement of many-qubit observables, implemented using a vast number of CNOT gates. Indeed, practically all operations performed by a fault-tol...
Constant Overhead Quantum Fault-Tolerance with Quantum Expander Codes
Omar Fawzi, Antoine Grospellier, Anthony Leverrier·Aug 11, 2018
We prove that quantum expander codes can be combined with quantum fault-tolerance techniques to achieve constant overhead: the ratio between the total number of physical qubits required for a quantum computation with faulty hardware and the number of...