Mutually unbiased bases for quantum degrees of freedom are central to all theoretical
investigations and practical exploitations of complementary properties. Much is known about …

The impossibility of perfectly copying (or cloning) an unknown quantum state is one of the
basic rules governing the physics of quantum systems. The processes that perform the …

Quantum entanglement, plays a vital role in many quantum-information and communication
tasks. Entangled states of higher-dimensional systems are of great interest owing to the …

Quantum networks are the ultimate target in quantum communication, where many
connected users can share information carried by quantum systems. The keystones of such …

We present measurements of coherence and successive decay dynamics of higher energy
levels of a superconducting transmon qubit. By applying consecutive π pulses for each …

A number of superconducting qubits, such as the transmon or the phase qubit, have an
energy level structure with small anharmonicity. This allows for convenient access of higher …

We study the protocol of qudit teleportation using quantum systems subjected to several
kinds of noise for arbitrary dimensionality d. We consider four classes of noise: dit-flip, d …

We show that the average power output of a quantum battery based on a quantum
interacting spin model, charged via a local magnetic field, can be enhanced with the …

High-dimensional quantum entanglement characterizes the entanglement of quantum
systems within a larger Hilbert space, introducing more intricate and complex correlations …

Spontaneous parametric downconversion (SPDC) in quantum optics is an invaluable
resource for the realization of high-dimensional qudits with spatial modes of light. One of the …