Showing 2021 · quant-phShow all

15 papers · 2 filters

quant-ph2021★ 28 cited

Optimal Thresholds for Fracton Codes and Random Spin Models with Subsystem Symmetry

Hao Song, Janik Schönmeier-Kromer, Ke Liu +3

Fracton models provide examples of novel gapped quantum phases of matter that host intrinsically immobile excitations and therefore lie beyond the conventional notion of topologica…

quant-ph2021★ 234 cited

Entangling single atoms over 33 km telecom fibre

Tim van Leent, Matthias Bock, Florian Fertig +10

Heralded entanglement between distant quantum memories is the key resource for quantum networks. Based on quantum repeater protocols, these networks will facilitate efficient large…

quant-ph2021★ 50 cited

Quantum probes for the characterization of nonlinear media

Alessandro Candeloro, Sholeh Razavian, Matteo Piccolini +3

Active optical media leading to interaction Hamiltonians of the form represent a crucial resource for quantum optical technology. In this paper…

quant-ph2021★ 4 cited

Suppressing nonperturbative gauge errors in the thermodynamic limit using local pseudogenerators

Maarten Van Damme, Julius Mildenberger, Fabian Grusdt +2

With recent progress in quantum simulations of lattice-gauge theories, it is becoming a pressing question how to reliably protect the gauge symmetry that defines such models. In a…

quant-ph2021

Neural Network Based Qubit Environment Characterization

Miha Papič, Inés de Vega

The exact microscopic structure of the environments that produces noise in superconducting qubits remains largely unknown, hindering our ability to have robust simulations an…

quant-ph2021★ 309 cited

Experimental device-independent quantum key distribution between distant users

Wei Zhang, Tim van Leent, Kai Redeker +7

Device-independent quantum key distribution (DIQKD) is the art of using untrusted devices to establish secret keys over an untrusted channel. So far, the real-world implementation…

quant-ph2021★ 188 cited

Programmable Interactions and Emergent Geometry in an Atomic Array

Avikar Periwal, Eric S. Cooper, Philipp Kunkel +3

Interactions govern the flow of information and the formation of correlations in quantum systems, dictating the phases of matter found in nature and the forms of entanglement gener…

quant-ph2021★ 52 cited

Ensemble reduced density matrix functional theory for excited states and hierarchical generalization of Pauli's exclusion principle

Christian Schilling, Stefano Pittalis

We propose and work out a reduced density matrix functional theory (RDMFT) for calculating energies of eigenstates of interacting many-electron systems beyond the ground state. Var…

quant-ph2021★ 42 cited

Foundation of one-particle reduced density matrix functional theory for excited states

Julia Liebert, Federico Castillo, Jean-Philippe Labbé +1

In [Phys. Rev. Lett. 127, 023001 (2021)] a reduced density matrix functional theory (RDMFT) has been proposed for calculating energies of selected eigenstates of interacting many-f…

quant-ph2021★ 17 cited

Questioning the adequacy of certain quantum arrival-time distributions

Siddhant Das, Ward Struyve

It is shown that a class of exponentially decaying time-of-arrival probability distributions suggested by Włodarz, Marchewka and Schuss, and Jurman and Nikolić, as well as a semicl…

quant-ph2021★ 8 cited

Coherent control in the ground and optically excited state of an ensemble of erbium dopants

Pablo Cova Fariña, Benjamin Merkel, Natalia Herrera Valencia +3

Ensembles of erbium dopants can realize quantum memories and frequency converters that operate in the minimal-loss wavelength band of fiber optical communication. Their operation r…

quant-ph2021★ 12 cited

Benchmarking a novel efficient numerical method for localized 1D Fermi-Hubbard systems on a quantum simulator

Bharath Hebbe Madhusudhana, Sebastian Scherg, Thomas Kohlert +2

Quantum simulators have made a remarkable progress towards exploring the dynamics of many-body systems, many of which offer a formidable challenge to both theoretical and numerical…

quant-ph2021★ 23 cited

Anomalous weak values via a single photon detection

E. Rebufello, F. Piacentini, A. Avella +7

Is it possible that a measurement of a spin component of a spin-1/2 particle yields the value 100? In 1988 Aharonov, Albert and Vaidman argued that upon pre- and postselection of p…

quant-ph2021

Open-cavity in closed-cycle cryostat as a quantum optics platform

Samarth Vadia, Johannes Scherzer, Holger Thierschmann +7

The introduction of an optical resonator can enable efficient and precise interaction between a photon and a solid-state emitter. It facilitates the study of strong light-matter in…

quant-ph2021★ 21 cited

Times of Arrival and Gauge Invariance

Siddhant Das, Markus Nöth

We revisit the arguments underlying two well-known arrival-time distributions in quantum mechanics, viz., the Aharonov-Bohm and Kijowski (ABK) distribution, applicable for freely m…