Local minima in quantum systems
Finding ground states of quantum many-body systems is known to be hard for both classical and quantum computers. Consequently, when a quantum syste…
Tag: Quantum information
Maximum tolerable excess noise in continuous-variable quantum key distribution and improved lower bound on two-way capacities
The two-way capacities of quantum channels determine the ultimate entanglement and secret-key distribution rates achievable by two distant parties …
Real-time observation of picosecond-timescale optical quantum entanglement towards ultrafast quantum information processing
Entanglement is a fundamental resource for various optical quantum information processing (QIP) applications. To achieve high-speed QIP systems, en…
Generation of three-dimensional cluster entangled state
Measurement-based quantum computing is a promising paradigm of quantum computation, in which universal computing is achieved through a sequence of …
Integrated optical entangled quantum vortex emitters
Quantum vortices of light carrying orbital angular momentum stand as essential resources for quantum photonic technologies. Recent advancements in …
High-efficiency single-photon source above the loss-tolerant threshold for efficient linear optical quantum computing
Photon loss is the biggest problem for scalable photonic quantum information processing. This issue can be tackled through quantum error correction…
Grover’s algorithm in a four-qubit silicon processor above the fault-tolerant threshold
Spin qubits in silicon are strong contenders for the realization of a practical quantum computer, having demonstrated single- and two-qubit gates w…
A wireless terahertz cryogenic interconnect that minimizes heat-to-information transfer
The development of practical quantum computers probably requires error-protected quantum processors with thousands of logical qubits. Reaching this…