Showing 2019 · quant-phShow all

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quant-ph2019★ 31 cited

Microwave shielding with far-from-circular polarization

Tijs Karman

Ultracold polar molecules can be shielded from fast collisional losses using microwaves, but achieving the required polarization purity is technically challenging. Here, we propose…

quant-ph2019★ 6 cited

Nonlinear Bell inequality for macroscopic measurements

Adam Bene Watts, Nicole Yunger Halpern, Aram Harrow

The correspondence principle suggests that quantum systems grow classical when large. Classical systems cannot violate Bell inequalities. Yet agents given substantial control can v…

quant-ph2019★ 104 cited

Quantum many-body scars from virtual entangled pairs

Sambuddha Chattopadhyay, Hannes Pichler, Mikhail D. Lukin +1

We study weak ergodicity breaking in a one-dimensional, nonintegrable spin-1 XY model. We construct for it an exact, highly excited eigenstate, which despite its large energy densi…

quant-ph2019★ 634 cited

Parallel implementation of high-fidelity multi-qubit gates with neutral atoms

Harry Levine, Alexander Keesling, Giulia Semeghini +8

We report the implementation of universal two- and three-qubit entangling gates on neutral atom qubits encoded in long-lived hyperfine ground states. The gates are mediated by exci…

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★ 118 cited

Emerging 2D Gauge theories in Rydberg configurable arrays

A. Celi, B. Vermersch, O. Viyuela +3

Solving strongly coupled gauge theories in two or three spatial dimensions is of fundamental importance in several areas of physics ranging from high-energy physics to condensed ma…

quant-ph2019★ 51 cited

Noncommuting conserved quantities in quantum many-body thermalization

Nicole Yunger Halpern, Michael E. Beverland, Amir Kalev

In statistical mechanics, a small system exchanges conserved quantities---heat, particles, electric charge, etc.---with a bath. The small system thermalizes to the canonical ensemb…

quant-ph2019★ 644 cited

Generation and manipulation of Schrödinger cat states in Rydberg atom arrays

Ahmed Omran, Harry Levine, Alexander Keesling +16

Quantum entanglement involving coherent superpositions of macroscopically distinct states is among the most striking features of quantum theory, but its realization is challenging,…

quant-ph2019★ 248 cited

Decoherence of dipolar spin ensembles in diamond

Erik Bauch, Swati Singh, Junghyun Lee +8

We present a combined theoretical and experimental study of solid-state spin decoherence in an electronic spin bath, focusing specifically on ensembles of nitrogen vacancy (NV) col…

quant-ph2019★ 183 cited

Quantum Metasurfaces

Rivka Bekenstein, Igor Pikovski, Hannes Pichler +3

Metasurfaces mold the flow of classical light waves by engineering sub-wavelength patterns from dielectric or metallic thin films. We describe and analyze a method in which quantum…

quant-ph2019★ 1.3k cited

Sensitivity Optimization for NV-Diamond Magnetometry

John F. Barry, Jennifer M. Schloss, Erik Bauch +4

Solid-state spin systems including nitrogen-vacancy (NV) centers in diamond constitute an increasingly favored quantum sensing platform. However, present NV ensemble devices exhibi…

quant-ph2019★ 136 cited

Quantum Advantage in Postselected Metrology

David R. M. Arvidsson-Shukur, Nicole Yunger Halpern, Hugo V. Lepage +3

We show that postselection offers a nonclassical advantage in metrology. In every parameter-estimation experiment, the final measurement or the postprocessing incurs some cost. Pos…

quant-ph2019★ 32 cited

Quantum acousto-optic control of light-matter interactions in nanophotonic networks

G. Calajo, M. J. A. Schuetz, H. Pichler +4

We analyze the coupling of atoms or atom-like emitters to nanophotonic waveguides in the presence of propagating acoustic waves. Specifically, we show that strong index modulations…