Showing 2020 · quant-phShow all

8 papers · 2 filters

quant-ph2020★ 3 cited

Quantum Circuit Transformation: A Monte Carlo Tree Search Framework

Xiangzhen Zhou, Yuan Feng, Sanjiang Li

In Noisy Intermediate-Scale Quantum (NISQ) era, quantum processing units (QPUs) suffer from, among others, highly limited connectivity between physical qubits. To make a quantum ci…

quant-ph2020★ 32 cited

Ubiquity of zeros of Loschmidt amplitude for mixed states in different physical processes and their implications

Xu-Yang Hou, Qu-Cheng Gao, Hao Guo +3

The Loschmidt amplitude of the purified states of mixed-state density matrices is shown to have zeros when the system undergoes a quasistatic, quench, or Uhlmann process. While the…

quant-ph2020★ 40 cited

Non-Hermitian Kibble-Zurek mechanism with tunable complexity in single-photon interferometry

Peng Xue, Lei Xiao, Dengke Qu +7

Non-Hermitian descriptions of quantum matter have seen impressive progress recently, with major advances in understanding central aspects such as their topological properties or th…

quant-ph2020★ 14 cited

Fourier Transform of the Orbital Angular Momentum of a Single Photon

Jaroslav Kysela, Xiaoqin Gao, Borivoje Dakić

Optical networks implementing single-qudit quantum computation gates may exhibit superior properties to those for qubits as each of the optical elements in the network can work in…

quant-ph2020★ 53 cited

Qubit Mapping Based on Subgraph Isomorphism and Filtered Depth-Limited Search

Sanjiang Li, Xiangzhen Zhou, Yuan Feng

Mapping logical quantum circuits to Noisy Intermediate-Scale Quantum (NISQ) devices is a challenging problem which has attracted rapidly increasing interests from both quantum and…

quant-ph2020★ 12 cited

A Quantum-based Database Query Scheme for Privacy Preservation in Cloud Environment

Wenjie Liu, Peipei Gao, Zhihao Liu +2

Cloud computing is a powerful and popular information technology paradigm that enables data service outsourcing and provides higher-level services with minimal management effort. H…

quant-ph2020★ 21 cited

Experimental demonstration of one-sided device-independent self-testing of any pure two-qubit entangled state

Zhihao Bian, A. S. Majumdar, C. Jebaratnam +5

We demonstrate one-sided device-independent self-testing of any pure entangled two-qubit state based on a fine-grained steering inequality. The maximum violation of a fine-grained…

quant-ph2020★ 12 cited

Experimental entropic test of state-independent contextuality via single photons

Dengke Qu, Pawel Kurzynski, Dagomir Kaszlikowski +5

Recently, an inequality satisfied by non-contextual hidden-variable models and violated by quantum mechanics for all states of a four-level system has been derived based on informa…