Papers

Hao-Kai Zhang, Jia-Xin Zhang, Ji-Si Xu +2 more·Sep 23, 2024

The pairing mechanism in doped antiferromagnets is essential for understanding high-temperature superconductivity. In this work, we investigate the pairing mechanism in bosonic doped antiferromagnets via large-scale density matrix renormalization gro...

N. Chakraborty, R. Moessner, Benoît Douçot·Sep 19, 2024

A crucial ingredient for scalable, fault-tolerant quantum computing is the construction of logical qubits with low error rates and intrinsic noise protection. We propose a construction for such hardware-level noise protection, in which the qubits are...

Sophie Blundell, Tom Radford, Idris A. Ajia +6 more·Sep 19, 2024

High-performance programmable silicon photonic circuits are considered to be a critical part of next-generation architectures for optical processing, photonic quantum circuits, and neural networks. Low-loss optical phase-change materials (PCMs) offer...

Tsuyoshi Yamamoto, Yasuhiro Tokura·Sep 14, 2024

Continuous quantum measurement and feedback induce energy exchange between a dissipative qubit and a monitor even in the steady state, as a measurement backaction. Using the Lindblad equation, we identified the maximum and minimum values of the stead...

Annika S. Wiening, Joern Bergendahl, Vicente Leyton-Ortega +1 more·Sep 12, 2024

In the burgeoning field of quantum computing, the precise design and optimization of quantum pulses are essential for enhancing qubit operation fidelity. This study focuses on refining the pulse engineering techniques for superconducting qubits, empl...

Francesco Monzani, Emanuele Ricci, Luca Nigro +1 more·Sep 12, 2024

We identify a noise model that ensures the functioning of an echo state network employing a gate-based quantum computer for reservoir computing applications. Energy dissipation induced by amplitude damping drastically improves the short-term memory c...

Himadri Pathak, Nicholas P. Bauman, Ajay Panyala +1 more·Sep 10, 2024

We present our successful implementation of the quantum electrodynamics coupled-cluster method with single and double excitations (QED-CCSD) for electronic and bosonic amplitudes, covering both individual and mixed excitation processes within the Exa...

T. Iadecola, Justin H. Wilson, J. H. Pixley·Sep 10, 2024

Adaptive quantum circuits—where a quantum many-body state is controlled using measurements and conditional unitary operations—are a powerful paradigm for state preparation and quantum error-correction tasks. They can support two types of nonequilibri...

Alexios Christopoulos, Alessandro Santini, G. Giachetti·Sep 10, 2024

This is a conference proceeding in the framework of workshop"OpenQMBP2023"at Institute Pascal (Orsay, France) and associated to the lecture given by Prof. Ehud Altman. We provide a comprehensive analysis of recent results in the context of measuremen...

Aleix Bou-Comas, Carlos Ramos Marimón, Jan T. Schneider +2 more·Sep 9, 2024

We propose a novel experimental protocol to measure generalized temporal entropies in many-body quantum systems. Our approach involves using local operators as probes to characterize the out-of-equilibrium dynamics induced by a geometric double quenc...

J. A. Montañez-Barrera, G. Beretta, K. Michielsen +1 more·Aug 30, 2024

As quantum processing units (QPUs) scale toward hundreds of qubits, diagnosing noise-induced correlations (crosstalk) becomes critical for reliable quantum computation. In this work, we introduce Zero-Entropy Classical Shadows (ZECS), a diagnostic to...

Xiang Deng, Wen Zheng, Xudong Liao +8 more·Aug 29, 2024

Superconducting quantum computing emerges as one of the leading candidates for achieving quantum advantage. However, a prevailing challenge is the coding overhead due to limited quantum connectivity, constrained by nearest-neighbor coupling among sup...

Zhong-Xia Shang, Qi Zhao·Aug 25, 2024

Estimating quantum amplitude, or the overlap between two quantum states, is a fundamental task in quantum computing and underpins numerous quantum algorithms. In this work, we introduce a novel algorithmic framework for quantum amplitude estimation b...

Yelleti Vivek, S. Vadlamani, Vadlamani Ravi +1 more·Aug 20, 2024

Modern deep learning continues to achieve outstanding performance on an astounding variety of high-dimensional tasks. In practice, this is obtained by fitting deep neural models to all the input data with minimal feature engineering, thus sacrificing...

Liran Shirizly, L. Govia, David C. McKay·Aug 14, 2024

Dynamic circuit operations -- measurements with feedforward -- are important components for future quantum computing efforts, but lag behind gates in the availability of characterization methods. Here we introduce a series of dynamic circuit benchmar...

Arash Ahmadi, J. Helsen, C. Karaca +1 more·Aug 7, 2024

The emergence of quantum technologies has brought much attention to the characterization of quantum resources as well as the classical simulatability of quantum processes. Quantum resources, as quantified by non-stabilizerness, have in one theoretica...

Lea Haas, Christian Carisch, O. Zilberberg·Aug 5, 2024

Quantum information scrambling is a process happening during thermalization in quantum systems and describes the delocalization of quantum information. It is closely tied to entanglement, a key resource for quantum technologies and an order parameter...

R. S. Eggli, T. Patlatiuk, E. G. Kelly +5 more·Jul 31, 2024

Building a practical quantum processor involves integrating millions of physical qubits along with the necessary components for individual qubit manipulation and readout. Arrays of gated silicon spins offer a promising route toward achieving this goa...

Kazuki Ikeda, Zhong-Bo Kang, D. Kharzeev +2 more·Jul 31, 2024

In this study, we explore the real-time dynamics of the chiral magnetic effect (CME) at a finite temperature in the (1+1)-dimensional QED, the massive Schwinger model. By introducing a chiral chemical potential μ5 through a quench process, we drive t...

Cole Kelson-Packer, A. Miyake·Jul 25, 2024

The interplay of unitary evolution and projective measurements is a modern interest in the study of many-body entanglement. On the one hand, the competition between these two processes leads to the recently discovered measurement-induced phase transi...