Category: Paper

Benjamin F. Schiffer, Dyon van Vreumingen, Jordi Tura, and Stefano Polla,

Quantum 8, 1346 (2024).

Transitions out of the ground space limit the performance of quantum adiabatic algorithms, while hardware imperfections impose stringent limitations on the circuit depth. We propose an adiab…

Noah Berthusen and Daniel Gottesman,

Quantum 8, 1345 (2024).

Hypergraph product codes are a promising avenue to achieving fault-tolerant quantum computation with constant overhead. When embedding these and other constant-rate qLDPC codes into 2D, a si…

Alexander Cowtan and Simon Burton,

Quantum 8, 1344 (2024).

We define code maps between Calderbank-Shor-Steane (CSS) codes using maps between chain complexes, and describe code surgery between such codes using a specific colimit in the category of ch…

Francesco Preti, Michael Schilling, Sofiene Jerbi, Lea M. Trenkwalder, Hendrik Poulsen Nautrup, Felix Motzoi, and Hans J. Briegel,

Quantum 8, 1343 (2024).

Shortening quantum circuits is crucial to reducing the destructive effect of environmental decoherence and enabling useful algorithms. Here, we demonstrate an improvement in such compilation…

Fang-Fang Du, Gang Fan, and Xue-Mei Ren,

Quantum 8, 1342 (2024).

The decoherence effect caused by the coupling between the system and the environment undoubtedly leads to the errors in efficient implementations of two (or three) qubit logical gates in qua…

Jakub Czartowski, Karol Życzkowski, and Daniel Braun,

Quantum 8, 1341 (2024).

We propose an analogue of $\text{SU}(1,1)$ interferometry to measure rotation of a spin by using two-spin squeezed states. Attainability of the Heisenberg limit for the estimation of the rotat…

Antonio Anna Mele,

Quantum 8, 1340 (2024).

The Haar measure plays a vital role in quantum information, but its study often requires a deep understanding of representation theory, posing a challenge for beginners. This tutorial aims t…

Balázs Pozsgay and Ian M. Wanless,

Quantum 8, 1339 (2024).

Absolutely maximally entangled (AME) states of $k$ qudits (also known as perfect tensors) are quantum states that have maximal entanglement for all possible bipartitions of the sites/parties.…

Jerzy Paczos, Kacper Dębski, Piotr T. Grochowski, Alexander R. H. Smith, and Andrzej Dragan,

Quantum 8, 1338 (2024).

According to relativity, the reading of an ideal clock is interpreted as the elapsed proper time along its classical trajectory through spacetime. In contrast, quantum theory allows the asso…

Louis Paletta, Anthony Leverrier, Alain Sarlette, Mazyar Mirrahimi, and Christophe Vuillot,

Quantum 8, 1337 (2024).

Between NISQ (noisy intermediate scale quantum) approaches without any proof of robust quantum advantage and fully fault-tolerant quantum computation, we propose a scheme to achieve a provab…

Karen V. Hovhannisyan and Alberto Imparato,

Quantum 8, 1336 (2024).

Characterizing fluctuations of work in coherent quantum systems is notoriously problematic. Here we reveal the ultimate source of the problem by proving that ($\mathfrak{A}$) energy conservati…

Hui Wang, Flaminia Giacomini, Franco Nori, and Miles P. Blencowe,

Quantum 8, 1335 (2024).

In physics, it is crucial to identify operational measurement procedures to give physical meaning to abstract quantities. There has been significant effort to define time operationally using…

Julien du Crest, Francisco Garcia-Herrero, Mehdi Mhalla, Valentin Savin, and Javier Valls,

Quantum 8, 1334 (2024).

The inherent degeneracy of quantum low-density parity-check codes poses a challenge to their decoding, as it significantly degrades the error-correction performance of classical message-pass…

Victor Barizien, Pavel Sekatski, and Jean-Daniel Bancal,

Quantum 8, 1333 (2024).

Bell inequalities play a key role in certifying quantum properties for device-independent quantum information protocols. It is still a major challenge, however, to devise Bell inequalities t…

Edwin Peter Lobo, Jef Pauwels, and Stefano Pironio,

Quantum 8, 1332 (2024).

Losses in the transmission channel, which increase with distance, pose a major obstacle to photonics demonstrations of quantum nonlocality and its applications. Recently, Chaturvedi, Viola,…

Yifan Jia and Angela Capel,

Quantum 8, 1331 (2024).

Quantum Wielandt's inequality gives an optimal upper bound on the minimal length $k$ such that length-$k$ products of elements in a generating system span $M_n(\mathbb{C})$. It is conjectured that…