Category: Paper

Jingzhen Hu, Qingzhong Liang, and Robert Calderbank,

Quantum 6, 802 (2022).

The challenge of quantum computing is to combine error resilience with universal computation. Diagonal gates such as the transversal $T$ gate play an important role in implementing a universal…

Archak Purkayastha, Giacomo Guarnieri, Steve Campbell, Javier Prior, and John Goold,

Quantum 6, 801 (2022).

We introduce unique class of cyclic quantum thermal machines (QTMs) which can maximize their performance at the finite value of cycle duration $\tau$ where they are most irreversible. These QT…

T. J. Volkoff and Yiğit Subaşı,

Quantum 6, 800 (2022).

We propose a continuous-variable (CV) SWAP test that requires no ancilla register, thereby generalizing the ancilla-free SWAP test for qubits. In this ancilla-free CV SWAP test, the computat…

Max D. Porter and Ilon Joseph,

Quantum 6, 799 (2022).

In certain regimes, the fidelity of quantum states will decay at a rate set by the classical Lyapunov exponent. This serves both as one of the most important examples of the quantum-classica…

Wonho Jang, Koji Terashi, Masahiko Saito, Christian W. Bauer, Benjamin Nachman, Yutaro Iiyama, Ryunosuke Okubo, and Ryu Sawada,

Quantum 6, 798 (2022).

There is no unique way to encode a quantum algorithm into a quantum circuit. With limited qubit counts, connectivity, and coherence times, a quantum circuit optimization is essential to make…

Alejandro Sopena, Max Hunter Gordon, Diego García-Martín, Germán Sierra, and Esperanza López,

Quantum 6, 796 (2022).

The Algebraic Bethe Ansatz (ABA) is a highly successful analytical method used to exactly solve several physical models in both statistical mechanics and condensed-matter physics. Here we br…

Carlo Marconi, Pau Colomer Saus, María García Díaz, and Anna Sanpera,

Quantum 6, 794 (2022).

We investigate attractor quantum neural networks (aQNNs) within the framework of coherence theory. We show that: i) aQNNs are associated to non-coherence-generating quantum channels; ii) the…

Hao Hu, Jiyoung Im, Jie Lin, Norbert Lütkenhaus, and Henry Wolkowicz,

Quantum 6, 792 (2022).

Security proof methods for quantum key distribution, QKD, that are based on the numerical key rate calculation problem, are powerful in principle. However, the practicality of the methods ar…

Eric Culf and Thomas Vidick,

Quantum 6, 791 (2022).

We establish a strong monogamy-of-entanglement property for subspace coset states, which are uniform superpositions of vectors in a linear subspace of $\mathbb{F}_2^n$ to which has been applie…

Ian Jauslin and Marius Lemm,

Quantum 6, 790 (2022).

We consider random translation-invariant frustration-free quantum spin Hamiltonians on $\mathbb Z^D$ in which the nearest-neighbor interaction in every direction is randomly sampled and then d…

Simon Milz, Jessica Bavaresco, and Giulio Chiribella,

Quantum 6, 788 (2022).

The capacity of distant parties to send signals to one another is a fundamental requirement in many information-processing tasks. Such ability is determined by the causal structure connectin…

Azat F. Aminov, Alexey A. Sokolik, and Yurii E. Lozovik,

Quantum 6, 787 (2022).

The Andreev-Bashkin effect, or superfluid drag, is predicted in a system of Bose-condensed excitonic polaritons in optical microcavity coupled by electron-exciton interaction with a supercon…