Quantum

Paper

Quantum circuits for solving local fermion-to-qubit mappings

Jannes Nys and Giuseppe Carleo,

Quantum 7, 930 (2023).

Local Hamiltonians of fermionic systems on a lattice can be mapped onto local qubit Hamiltonians. Maintaining the locality of the operators comes at the expense of increasing the Hilbert spa…

Paper

Efficient color code decoders in $d\geq 2$ dimensions from toric code decoders

Aleksander Kubica and Nicolas Delfosse,

Quantum 7, 929 (2023).

We introduce an efficient decoder of the color code in $d\geq 2$ dimensions, the Restriction Decoder, which uses any $d$-dimensional toric code decoder combined with a local lifting procedure to…

Paper

Black holes as clouded mirrors: the Hayden-Preskill protocol with symmetry

Yoshifumi Nakata, Eyuri Wakakuwa, and Masato Koashi,

Quantum 7, 928 (2023).

The Hayden-Preskill protocol is a qubit-toy model of the black hole information paradox. Based on the assumption of scrambling, it was revealed that quantum information is instantly leaked o…

Paper

Classifying phases protected by matrix product operator symmetries using matrix product states

José Garre-Rubio, Laurens Lootens, and András Molnár,

Quantum 7, 927 (2023).

We classify the different ways in which matrix product states (MPSs) can stay invariant under the action of matrix product operator (MPO) symmetries. This is achieved through a local charact…

Paper

Quantifying EPR: the resource theory of nonclassicality of common-cause assemblages

Beata Zjawin, David Schmid, Matty J. Hoban, and Ana Belén Sainz,

Quantum 7, 926 (2023).

Einstein-Podolsky-Rosen (EPR) steering is often (implicitly or explicitly) taken to be evidence for spooky action-at-a-distance. An alternative perspective on steering is that Alice has no c…

Paper

Enabling Multi-programming Mechanism for Quantum Computing in the NISQ Era

Siyuan Niu and Aida Todri-Sanial,

Quantum 7, 925 (2023).

NISQ devices have several physical limitations and unavoidable noisy quantum operations, and only small circuits can be executed on a quantum machine to get reliable results. This leads to t…

Paper

Performance analysis of quantum repeaters enabled by deterministically generated photonic graph states

Yuan Zhan, Paul Hilaire, Edwin Barnes, Sophia E. Economou, and Shuo Sun,

Quantum 7, 924 (2023).

By encoding logical qubits into specific types of photonic graph states, one can realize quantum repeaters that enable fast entanglement distribution rates approaching classical communicatio…

Paper

Purifying teleportation

Katarzyna Roszak and Jarosław K. Korbicz,

Quantum 7, 923 (2023).

Coupling to the environment typically suppresses quantum properties of physical systems via decoherence mechanisms. This is one of the main obstacles in practical implementations of quantum…

Paper

Graph-theoretic approach to Bell experiments with low detection efficiency

Zhen-Peng Xu, Jonathan Steinberg, Jaskaran Singh, Antonio J. López-Tarrida, José R. Portillo, and Adán Cabello,

Quantum 7, 922 (2023).

Bell inequality tests where the detection efficiency is below a certain threshold $\eta_{\rm{crit}}$ can be simulated with local hidden-variable models. Here, we introduce a method to identify…

Paper

Quantum circuit debugging and sensitivity analysis via local inversions

Fernando A. Calderon-Vargas, Timothy Proctor, Kenneth Rudinger, and Mohan Sarovar,

Quantum 7, 921 (2023).

As the width and depth of quantum circuits implemented by state-of-the-art quantum processors rapidly increase, circuit analysis and assessment via classical simulation are becoming unfeasib…

Paper

Distributing Multipartite Entanglement over Noisy Quantum Networks

Luís Bugalho, Bruno C. Coutinho, Francisco A. Monteiro, and Yasser Omar,

Quantum 7, 920 (2023).

A quantum internet aims at harnessing networked quantum technologies, namely by distributing bipartite entanglement between distant nodes. However, multipartite entanglement between the node…

Paper

Optimized Quantum Networks

Jorge Miguel-Ramiro, Alexander Pirker, and Wolfgang Dür,

Quantum 7, 919 (2023).

The topology of classical networks is determined by physical links between nodes, and after a network request the links are used to establish the desired connections. Quantum networks offer…

Paper

Geometry of Degeneracy in Potential and Density Space

Markus Penz and Robert van Leeuwen,

Quantum 7, 918 (2023).

In a previous work [J. Chem. Phys. 155, 244111 (2021)], we found counterexamples to the fundamental Hohenberg-Kohn theorem from density-functional theory in finite-lattice systems represente…

Paper

Dynamical many-body delocalization transition of a Tonks gas in a quasi-periodic driving potential

Vincent Vuatelet and Adam Rançon,

Quantum 7, 917 (2023).

The quantum kicked rotor is well-known for displaying dynamical (Anderson) localization. It has recently been shown that a periodically kicked Tonks gas will always localize and converge to…

Paper

Error-resilient Monte Carlo quantum simulation of imaginary time

Mingxia Huo and Ying Li,

Quantum 7, 916 (2023).

Computing the ground-state properties of quantum many-body systems is a promising application of near-term quantum hardware with a potential impact in many fields. The conventional algorithm…

Paper

Fully non-positive-partial-transpose genuinely entangled subspaces

Owidiusz Makuta, Błażej Kuzaka, and Remigiusz Augusiak,

Quantum 7, 915 (2023).

Genuinely entangled subspaces are a class of subspaces in the multipartite Hilbert spaces that are composed of only genuinely entangled states. They are thus an interesting object of study i…

Category: Paper