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- Centre for Quantum TechnologiesSG2.2k papers
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2,109 papers · 1 filter
On estimating operator norm distance, with optimal trace distance estimation when one state is pure
Yupan Liu, Qisheng Wang, Zhan Yu
We investigate the computational complexity of estimating the operator norm distance , defined via the operator norm , give…
Stabilization of Granovskii-Zhedanov scars of the XYZ quantum spin chain via non-Hermitian spin relaxation
Dhiman Bhowmick
The Granovskii-Zhedanov (GZ) states are exact scar states of the spin-S XYZ chain for S >= 1. As a result, local quantum information encoded in a GZ state remains preserved under t…
High fidelity preservation of photonic hyperentanglement in a free-space optical delay line
Yu Guo, Arya Chowdhury, Pranay Tiwari +3
Photonic hyperentanglement enables increased information capacity and enhanced functionality for quantum communication and networking. However, synchronization of hyperentangled ph…
Approaching the Ultimate Limit of Quantum Multiparameter Estimation by Many-Body Physics
Mankei Tsang
I propose a physical measurement scheme on multiple independent and identically distributed quantum objects to approach the Holevo--Nagaoka bound for quantum multiparameter estimat…
Device-independent quantum key distribution over 100 km with single atoms
Bo-Wei Lu, Chao-Wei Yang, Run-Qi Wang +15
Device-independent quantum key distribution (DI-QKD) is a key application of the quantum internet. We report the realization of DI-QKD between two single-atom nodes linked by 100-k…
Hamiltonian Benchmark of a Solid-State Spin-Photon Interface for Computation
Tejas Acharya, Loïc Lanco, Olivier Krebs +3
Light-matter interfaces are pivotal for quantum computation and communication. While typically analyzed using single-mode or open-quantum-system approximations, these models often…