Quantum

Paper

On relating one-way classical and quantum communication complexities

Naresh Goud Boddu, Rahul Jain, and Han-Hsuan Lin,

Quantum 7, 1010 (2023).

Communication complexity is the amount of communication needed to compute a function when the function inputs are distributed over multiple parties. In its simplest form, one-way communicati…

Paper

Simplicial quantum contextuality

Cihan Okay, Aziz Kharoof, and Selman Ipek,

Quantum 7, 1009 (2023).

We introduce a new framework for contextuality based on simplicial sets, combinatorial models of topological spaces that play a prominent role in modern homotopy theory. Our approach extends…

Paper

Continuous-Variable Entanglement through Central Forces: Application to Gravity between Quantum Masses

Ankit Kumar, Tanjung Krisnanda, Paramasivan Arumugam, and Tomasz Paterek,

Quantum 7, 1008 (2023).

We describe a complete method for a precise study of gravitational interaction between two nearby quantum masses. Since the displacements of these masses are much smaller than the initial se…

Paper

Unitary Evolutions Sourced By Interacting Quantum Memories: Closed Quantum Systems Directing Themselves Using Their State Histories

Alireza Tavanfar, Aliasghar Parvizi, and Marco Pezzutto,

Quantum 7, 1007 (2023).

We propose, formulate and examine novel quantum systems and behavioral phases in which momentary choices of the system's memories interact in order to source the internal interactions and un…

Paper

Characterizing and mitigating coherent errors in a trapped ion quantum processor using hidden inverses

Swarnadeep Majumder, Christopher G. Yale, Titus D. Morris, Daniel S. Lobser, Ashlyn D. Burch, Matthew N. H. Chow, Melissa C. Revelle, Susan M. Clark, and Raphael C. Pooser,

Quantum 7, 1006 (2023).

Quantum computing testbeds exhibit high-fidelity quantum control over small collections of qubits, enabling performance of precise, repeatable operations followed by measurements. Currently,…

Paper

Bias-tailored quantum LDPC codes

Joschka Roffe, Lawrence Z. Cohen, Armanda O. Quintavalle, Daryus Chandra, and Earl T. Campbell,

Quantum 7, 1005 (2023).

Bias-tailoring allows quantum error correction codes to exploit qubit noise asymmetry. Recently, it was shown that a modified form of the surface code, the XZZX code, exhibits considerably i…

Paper

Robust quantum many-body scars in lattice gauge theories

Jad C. Halimeh, Luca Barbiero, Philipp Hauke, Fabian Grusdt, and Annabelle Bohrdt,

Quantum 7, 1004 (2023).

Quantum many-body scarring is a paradigm of weak ergodicity breaking arising due to the presence of special nonthermal many-body eigenstates that possess low entanglement entropy, are equall…

Paper

Distance-based resource quantification for sets of quantum measurements

Lucas Tendick, Martin Kliesch, Hermann Kampermann, and Dagmar Bruß,

Quantum 7, 1003 (2023).

The advantage that quantum systems provide for certain quantum information processing tasks over their classical counterparts can be quantified within the general framework of resource theor…

Paper

Two-Unitary Decomposition Algorithm and Open Quantum System Simulation

Nishchay Suri, Joseph Barreto, Stuart Hadfield, Nathan Wiebe, Filip Wudarski, and Jeffrey Marshall,

Quantum 7, 1002 (2023).

Simulating general quantum processes that describe realistic interactions of quantum systems following a non-unitary evolution is challenging for conventional quantum computers that directly…

Paper

A refinement of Reznick’s Positivstellensatz with applications to quantum information theory

Alexander Müller-Hermes, Ion Nechita, and David Reeb,

Quantum 7, 1001 (2023).

In his solution of Hilbert's 17th problem Artin showed that any positive definite polynomial in several variables can be written as the quotient of two sums of squares. Later Reznick showed…

Paper

Perturbation theory with quantum signal processing

Kosuke Mitarai, Kiichiro Toyoizumi, and Wataru Mizukami,

Quantum 7, 1000 (2023).

Perturbation theory is an important technique for reducing computational cost and providing physical insights in simulating quantum systems with classical computers. Here, we provide a quant…

Paper

Concentration bounds for quantum states and limitations on the QAOA from polynomial approximations

Anurag Anshu and Tony Metger,

Quantum 7, 999 (2023).

We prove concentration bounds for the following classes of quantum states: (i) output states of shallow quantum circuits, answering an open question from [16]; (ii) injective matrix product…

Paper

Only Classical Parameterised States have Optimal Measurements under Least Squares Loss

Wilfred Salmon, Sergii Strelchuk, and David Arvidsson-Shukur,

Quantum 7, 998 (2023).

Measurements of quantum states form a key component in quantum-information processing. It is therefore an important task to compare measurements and furthermore decide if a measurement strat…

Paper

Sample-efficient verification of continuously-parameterized quantum gates for small quantum processors

Ryan Shaffer, Hang Ren, Emiliia Dyrenkova, Christopher G. Yale, Daniel S. Lobser, Ashlyn D. Burch, Matthew N. H. Chow, Melissa C. Revelle, Susan M. Clark, and Hartmut Häffner,

Quantum 7, 997 (2023).

Most near-term quantum information processing devices will not be capable of implementing quantum error correction and the associated logical quantum gate set. Instead, quantum circuits will…

Paper

Inflation: a Python library for classical and quantum causal compatibility

Emanuel-Cristian Boghiu, Elie Wolfe, and Alejandro Pozas-Kerstjens,

Quantum 7, 996 (2023).

We introduce Inflation, a Python library for assessing whether an observed probability distribution is compatible with a causal explanation. This is a central problem in both theoretical and…

Paper

Measurement optimization of variational quantum simulation by classical shadow and derandomization

Kouhei Nakaji, Suguru Endo, Yuichiro Matsuzaki, and Hideaki Hakoshima,

Quantum 7, 995 (2023).

Simulating large quantum systems is the ultimate goal of quantum computing. Variational quantum simulation (VQS) gives us a tool to achieve the goal in near-term devices by distributing the…

Category: Paper