paper / luchaoyang / Dec 23
FastMPS addresses limitations in large-scale Matrix Product State (MPS) sampling by integrating data parallelism across samples with tensor parallelism along bond dimensions. This novel approach mitigates memory and I/O bottlenecks through compression and overlapping, effectively reactivating data parallelism for massive MPS. The framework demonstrates significant performance gains and scalability, enabling complex simulations previously unattainable with existing methods.
matrix-product-statequantum-physicsdistributed-computingparallel-computinghigh-performance-computingtensor-networksquantum-chemistry
“Traditional data parallelism is inefficient for large-scale MPS due to memory and I/O constraints.”
paper / luchaoyang / Nov 28
Researchers have developed algorithmic protocols, specifically Quantum Kernel Function Expansion (QKFE), to simulate quantum thermodynamics on quantum hardware. This method generates free energy as an analytic function of temperature, demonstrating uniform convergence. The approach offers a comprehensive framework for computing thermodynamic potentials on programmable quantum devices, enabling the determination of critical thermodynamic properties such as entropy, heat capacity, and criticality.
quantum-thermodynamicsquantum-simulationquantum-computingsuperconducting-qubitsalgorithmic-protocolsmaterial-designdrug-development
“Algorithmic protocols called Quantum Kernel Function Expansion (QKFE) can simulate quantum thermodynamics on quantum hardware.”
paper / luchaoyang / Nov 12
This research demonstrates the first unconditional quantum teleportational advantage for single photons, overcoming the critical challenge of photon loss in quantum communications. By implementing an all-optical scheme for remote entangled photon preparation, the study achieved an 82% heralding efficiency for event-ready entangled photons through a 15-dB channel. This led to a 2.95-fold enhancement in teleportation-based transmission efficiency compared to direct transmission, signifying a significant advancement in quantum communication capabilities.
quantum-teleportationquantum-communicationphoton-lossentanglementquantum-physicsquantum-advantage
“Photon loss is the most significant obstacle in quantum communications, limiting advanced applications like loophole-free Bell tests and device-independent quantum key distribution.”
paper / luchaoyang / Sep 15
This paper reports the first direct observation of relativistic aspects within Bohmian mechanics using weak measurement techniques in a double-slit interferometer. The experiment reconstructs relativistic Bohmian trajectories of single photons and reveals negative effective squared mass density, indicative of tachyonic behavior. It further examines continuity equations for both Klein-Gordon and Schrödinger equations, demonstrating energy conservation but non-conservation of particle number for a free scalar field in a relativistic framework. These findings provide empirical support for elusive relativistic features in Bohmian mechanics and uncover novel phenomena in the double-slit experiment.
quantum-mechanicsbohmian-mechanicsrelativityexperimental-physicsphotonicspilot-wave-theory
“Relativistic characteristics of Bohmian mechanics have been directly observed for the first time.”