output
20132026
most citedExperimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km

2.8k citations

Showing 2019 · quant-phShow all

34 papers · 2 filters

quant-ph2019★ 43 cited

Efficient computation of the waiting time and fidelity in quantum repeater chains

Sebastiaan Brand, Tim Coopmans, David Elkouss

Quantum communication enables a host of applications that cannot be achieved by classical communication means, with provably secure communication as one of the prime examples. The…

quant-ph2019★ 14 cited

A sparse spin qubit array with integrated control electronics

Jelmer M. Boter, Juan P. Dehollain, Jeroen P. G. van Dijk +6

Current implementations of quantum computers suffer from large numbers of control lines per qubit, becoming unmanageable with system scale up. Here, we discuss a sparse spin-qubit…

quant-ph2019★ 50 cited

Repetitive quantum non-demolition measurement and soft decoding of a silicon spin qubit

Xiao Xue, Benjamin D'Anjou, Thomas F. Watson +8

Quantum error correction is of crucial importance for fault-tolerant quantum computers. As an essential step towards the implementation of quantum error-correcting codes, quantum n…

quant-ph2019★ 27 cited

Verifiable Hybrid Secret Sharing With Few Qubits

Victoria Lipinska, Gláucia Murta, Jérémy Ribeiro +1

We consider the task of sharing a secret quantum state in a quantum network in a verifiable way. We propose a protocol that achieves this task, while reducing the number of require…

quant-ph2019★ 9 cited

Long-lived coherence in driven spin systems: from two to infinite spatial dimensions

Walter Hahn, V. V. Dobrovitski

Long-lived coherences, emerging under periodic pulse driving in the disordered ensembles of strongly interacting spins, offer immense advantages for future quantum technologies, bu…

quant-ph2019★ 4 cited

Quantum simulation by qubitization without Toffoli gates

Mark Steudtner, Stephanie Wehner

Qubitization is a modern approach to estimate Hamiltonian eigenvalues without simulating its time evolution. While in this way approximation errors are avoided, its resource and ga…

quant-ph2019★ 1 cited

Certification of a functionality in a quantum network stage

Victoria Lipinska, Le Phuc Thinh, Jeremy Ribeiro +1

We consider testing the ability of quantum network nodes to execute multi-round quantum protocols. Specifically, we examine protocols in which the nodes are capable of performing q…

quant-ph2019★ 53 cited

A gate-tunable, field-compatible fluxonium

Marta Pita-Vidal, Arno Bargerbos, Chung-Kai Yang +7

Circuit quantum electrodynamics, where photons are coherently coupled to artificial atoms built with superconducting circuits, has enabled the investigation and control of macrosco…

quant-ph2019★ 40 cited

Mapping graph state orbits under local complementation

Jeremy C. Adcock, Sam Morley-Short, Axel Dahlberg +1

Graph states, and the entanglement they posses, are central to modern quantum computing and communications architectures. Local complementation---the graph operation that links all…

quant-ph2019★ 28 cited

Realizing modular quadrature measurements via a tunable photon-pressure coupling in circuit-QED

Daniel J. Weigand, Barbara M. Terhal

One of the most direct preparations of a Gottesman-Kitaev-Preskill qubit in an oscillator uses a tunable photon-pressure (also called optomechanical) coupling of the form $g \hat{q…

quant-ph2019★ 34 cited

Fault-tolerant Quantum Error Correction on Near-term Quantum Processors using Flag and Bridge Qubits

Lingling Lao, Carmen G. Almudever

Fault-tolerant (FT) computation by using quantum error correction (QEC) is essential for realizing large-scale quantum algorithms. Devices are expected to have enough qubits to dem…

quant-ph2019★ 81 cited

A quasiprobability distribution for heat fluctuations in the quantum regime

Amikam Levy, Matteo Lostaglio

The standard approach to deriving fluctuation theorems fails to capture the effect of quantum correlation and coherence in the initial state of the system. Here we overcome this di…

quant-ph2019★ 7 cited

Noise-robust exploration of many-body quantum states on near-term quantum devices

Johannes Borregaard, Matthias Christandl, Daniel Stilck França

We describe a resource-efficient approach to studying many-body quantum states on noisy, intermediate-scale quantum devices. We employ a sequential generation model that allows us…

quant-ph2019★ 94 cited

Nearly Optimal Measurement Scheduling for Partial Tomography of Quantum States

Xavier Bonet-Monroig, Ryan Babbush, Thomas E. O'Brien

Many applications of quantum simulation require to prepare and then characterize quantum states by performing an efficient partial tomography to estimate observables corresponding…

quant-ph2019★ 75 cited

Timing and resource-aware mapping of quantum circuits to superconducting processors

Lingling Lao, Hans van Someren, Imran Ashraf +1

Quantum algorithms need to be compiled to respect the constraints imposed by quantum processors, which is known as the mapping problem. The mapping procedure will result in an incr…

quant-ph2019★ 8 cited

Counting single-qubit Clifford equivalent graph states is #P-Complete

Axel Dahlberg, Jonas Helsen, Stephanie Wehner

Graph states, which include for example Bell states, GHZ states and cluster states, form a well-known class of quantum states with applications ranging from quantum networks to err…

quant-ph2019★ 27 cited

Transforming graph states to Bell-pairs is NP-Complete

Axel Dahlberg, Jonas Helsen, Stephanie Wehner

Critical to the construction of large scale quantum networks, i.e. a quantum internet, is the development of fast algorithms for managing entanglement present in the network. One f…

quant-ph2019★ 165 cited

One-way quantum repeater based on near-deterministic photon-emitter interfaces

Johannes Borregaard, Hannes Pichler, Tim Schöder +3

We propose a novel one-way quantum repeater architecture based on photonic tree-cluster states. Encoding a qubit in a photonic tree-cluster protects the information from transmissi…

quant-ph2019★ 92 cited

Time-domain characterization and correction of on-chip distortion of control pulses in a quantum processor

M. A. Rol, L. Ciorciaro, F. K. Malinowski +7

We introduce Cryoscope, a method for sampling on-chip baseband pulses used to dynamically control qubit frequency in a quantum processor. We specifically use Cryoscope to measure t…

quant-ph2019★ 14 cited

Quantum Pin Codes

Christophe Vuillot, Nikolas P. Breuckmann

We introduce quantum pin codes: a class of quantum CSS codes. Quantum pin codes are a generalization of quantum color codes and Reed-Muller codes and share a lot of their structure…

quant-ph2019★ 111 cited

Entanglement between a diamond spin qubit and a photonic time-bin qubit at telecom wavelength

Anna Tchebotareva, Sophie L. N. Hermans, Peter C. Humphreys +8

We report on the realization and verification of quantum entanglement between an NV electron spin qubit and a telecom-band photonic qubit. First we generate entanglement between th…

quant-ph2019★ 37 cited

Entanglement and non-locality between disparate solid-state quantum memories mediated by photons

Marcel. li Grimau Puigibert, Mohsen Falamarzi Askarani, Jacob H. Davidson +7

Entangling quantum systems with different characteristics through the exchange of photons is a prerequisite for building future quantum networks. Proving the presence of entangleme…

quant-ph2019★ 291 cited

Atomic-scale imaging of a 27-nuclear-spin cluster using a single-spin quantum sensor

M. H. Abobeih, J. Randall, C. E. Bradley +6

Nuclear magnetic resonance (NMR) is a powerful method for determining the structure of molecules and proteins. While conventional NMR requires averaging over large ensembles, recen…

quant-ph2019★ 464 cited

A 10-qubit solid-state spin register with quantum memory up to one minute

C. E. Bradley, J. Randall, M. H. Abobeih +6

Spins associated to single defects in solids provide promising qubits for quantum information processing and quantum networks. Recent experiments have demonstrated long coherence t…