Gaussian boson sampling with pseudo-photon-number-resolving detectors and quantum computational advantage

YH Deng, YC Gu, HL Liu, SQ Gong, H Su, ZJ Zhang… - Physical review …, 2023 - APS
We report new Gaussian boson sampling experiments with pseudo-photon-number-
resolving detection, which register up to 255 photon-click events. We consider partial photon …

Bell sampling from quantum circuits

D Hangleiter, MJ Gullans - Physical Review Letters, 2024 - APS
A central challenge in the verification of quantum computers is benchmarking their
performance as a whole and demonstrating their computational capabilities. In this Letter …

Free-fermion Page curve: Canonical typicality and dynamical emergence

XH Yu, Z Gong, JI Cirac - Physical Review Research, 2023 - APS
We provide further analytical insights into the recently established noninteracting (free-
fermion) Page curve, focusing on both the kinematic and dynamical aspects. First, we unveil …

Exploring shallow-depth boson sampling: Toward a scalable quantum advantage

B Go, C Oh, L Jiang, H Jeong - Physical Review A, 2024 - APS
Boson sampling is a sampling task proven to be hard to simulate efficiently using classical
computers under plausible assumptions, which makes it an appealing candidate for …

Energy-dependent barren plateau in bosonic variational quantum circuits

B Zhang, Q Zhuang - Quantum Science and Technology, 2024 - iopscience.iop.org
Bosonic variational quantum circuits (VQCs) are crucial for information processing in
microwave cavities, trapped ions, and optical systems, widely applicable in quantum …

Exploring Shallow-Depth Boson Sampling: Towards Scalable Quantum Supremacy

B Go, C Oh, L Jiang, H Jeong - arXiv preprint arXiv:2306.10671, 2023 - arxiv.org
Boson sampling is a sampling task proven to be hard to simulate efficiently using classical
computers under plausible assumptions, which makes it an appealing candidate for …

Entanglement in the full state vector of boson sampling

Y Qiao, J Huh, F Grossmann - SciPost Physics, 2023 - scipost.org
The full state vector of boson sampling is generated by passing $ S $ single photons through
beam splitters of $ M $ modes. We express the initial Fock state in terms of 2$^{S-1} …

Petz–Rényi relative entropy of thermal states and their displacements

G Androulakis, TC John - Letters in Mathematical Physics, 2024 - Springer
In this letter, we obtain the precise range of the values of the parameter α such that Petz–
Rényi α-relative entropy D α (ρ|| σ) of two faithful displaced thermal states is finite. More …

Deep thermalization in continuous-variable quantum systems

C Liu, QC Huang, WW Ho - arXiv preprint arXiv:2405.05470, 2024 - arxiv.org
We uncover emergent universality arising in the equilibration dynamics of multimode
continuous-variable systems. Specifically, we study the ensemble of pure states supported …

Average Rényi entropy of a subsystem in random pure state

MS Kim, MR Hwang, E Jung, DK Park - Quantum Information Processing, 2024 - Springer
In this paper, we examine the average Rényi entropy S α of a subsystem A when the whole
composite system AB is a random pure state. We assume that the Hilbert space dimensions …