Quantum

Paper

Study of noise in virtual distillation circuits for quantum error mitigation

Pontus Vikstål, Giulia Ferrini, and Shruti Puri,

Quantum 8, 1441 (2024).

Virtual distillation has been proposed as an error mitigation protocol for estimating the expectation values of observables in quantum algorithms. It proceeds by creating a cyclic permutatio…

Paper

Quantum Reference Frames for Lorentz Symmetry

Luca Apadula, Esteban Castro-Ruiz, and Časlav Brukner,

Quantum 8, 1440 (2024).

Since their first introduction, Quantum Reference Frame (QRF) transformations have been extensively discussed, generalising the covariance of physical laws to the quantum domain. Despite imp…

Paper

Approximate Quantum Codes From Long Wormholes

Gregory Bentsen, Phuc Nguyen, and Brian Swingle,

Quantum 8, 1439 (2024).

We discuss families of approximate quantum error correcting codes which arise as the nearly-degenerate ground states of certain quantum many-body Hamiltonians composed of non-commuting terms…

Paper

Measurement-efficient quantum Krylov subspace diagonalisation

Zongkang Zhang, Anbang Wang, Xiaosi Xu, and Ying Li,

Quantum 8, 1438 (2024).

The Krylov subspace methods, being one category of the most important classical numerical methods for linear algebra problems, can be much more powerful when generalised to quantum computing…

Paper

Maximum expectation of observables with restricted purity states

Vikesh Siddhu and John Aaron Smolin,

Quantum 8, 1437 (2024).

Assessment of practical quantum information processing (QIP) remains partial without understanding limits imposed by noise. Unfortunately, mere description of noise grows exponentially with…

Paper

Non-Markovianity in High-Dimensional Open Quantum Systems using Next-generation Multicore Optical Fibers

Santiago Rojas-Rojas, Daniel Martínez, Kei Sawada, Luciano Pereira, Stephen P. Walborn, Esteban S. Gómez, Nadja K. Bernardes, and Gustavo Lima,

Quantum 8, 1436 (2024).

With the advent of quantum technology, the interest in communication tasks assisted by quantum systems has increased both in academia and industry. Nonetheless, the transmission of a quantum…

Paper

Resource-Efficient Real-Time Polarization Compensation for MDI-QKD with Rejected Data

Olinka Bedroya, Chenyang Li, Wenyuan Wang, Jianyong Hu, Hoi-Kwong Lo, and Li Qian,

Quantum 8, 1435 (2024).

Measurement-device-independent quantum key distribution (MDI-QKD) closes all the security loopholes in the detection system and is a promising solution for secret key sharing. Polarization e…

Paper

Hayden-Preskill recovery in chaotic and integrable unitary circuit dynamics

Michael A. Rampp and Pieter W. Claeys,

Quantum 8, 1434 (2024).

The Hayden-Preskill protocol probes the capability of information recovery from local subsystems after unitary dynamics. As such it resolves the capability of quantum many-body systems to dy…

Paper

A learning theory for quantum photonic processors and beyond

Matteo Rosati,

Quantum 8, 1433 (2024).

We consider the tasks of learning quantum states, measurements and channels generated by continuous-variable (CV) quantum circuits. This family of circuits is suited to describe optical quan…

Paper

Entanglement spectrum of matchgate circuits with universal and non-universal resources

Andrew M. Projansky, Joshuah T. Heath, and James D. Whitfield,

Quantum 8, 1432 (2024).

The entanglement level statistics of a quantum state have recently been proposed to be a signature of universality in the underlying quantum circuit. This is a consequence of level repulsion…

Paper

Long-lived collective Rydberg excitations in atomic gas achieved via ac-Stark lattice modulation

Stanisław Kurzyna, Bartosz Niewelt, Mateusz Mazelanik, Wojciech Wasilewski, and Michał Parniak,

Quantum 8, 1431 (2024).

Collective Rydberg excitations provide promising applications ranging from quantum information processing, and quantum computing to ultra-sensitive electrometry. However, their short lifetim…

Paper

Stabilization of symmetry-protected long-range entanglement in stochastic quantum circuits

Iosifina Angelidi, Marcin Szyniszewski, and Arijeet Pal,

Quantum 8, 1430 (2024).

Long-range entangled states are vital for quantum information processing and quantum metrology. Preparing such states by combining measurements with unitary gates opened new possibilities fo…

Paper

Improved Pairwise Measurement-Based Surface Code

Linnea Grans-Samuelsson, Ryan V. Mishmash, David Aasen, Christina Knapp, Bela Bauer, Brad Lackey, Marcus P. da Silva, and Parsa Bonderson,

Quantum 8, 1429 (2024).

We devise a new realization of the surface code on a rectangular lattice of qubits utilizing single-qubit and nearest-neighbor two-qubit Pauli measurements and three auxiliary qubits per pla…

Paper

Adiabatic quantum trajectories in engineered reservoirs

Emma C. King, Luigi Giannelli, Raphaël Menu, Johannes N. Kriel, and Giovanna Morigi,

Quantum 8, 1428 (2024).

We analyze the efficiency of protocols for adiabatic quantum state transfer assisted by an engineered reservoir. The target dynamics is a quantum trajectory in the Hilbert space and is a fix…

Paper

Single-shot Quantum Signal Processing Interferometry

Jasmine Sinanan-Singh, Gabriel L. Mintzer, Isaac L. Chuang, and Yuan Liu,

Quantum 8, 1427 (2024).

Quantum systems of infinite dimension, such as bosonic oscillators, provide vast resources for quantum sensing. Yet, a general theory on how to manipulate such bosonic modes for sensing beyo…

Paper

Universal framework for simultaneous tomography of quantum states and SPAM noise

Abhijith Jayakumar, Stefano Chessa, Carleton Coffrin, Andrey Y. Lokhov, Marc Vuffray, and Sidhant Misra,

Quantum 8, 1426 (2024).

We present a general denoising algorithm for performing $\textit{simultaneous tomography}$ of quantum states and measurement noise. This algorithm allows us to fully characterize state prepara…

Category: Paper