Quick Quantum Steering: Overcoming Loss and Noise with Qudits

High Dimensional Quantum Digital Signature Depending on Entanglement Swapping

“…Shen et al [22] have demonstrated how to create and control multi-partite classically entangled light in eight dimensions. Srivastav et al [23] have experimentally demonstrated quantum steering up to 53 dimensions, showing improvements over qubitbased systems and high dimension overcoming loss and noise. Hu and Kais [24] show that quantum wave gates exist and the wave-particle duality of qudit quantum space.…”

Entanglement Detection with Imprecise Measurements

“…It is well-known that entanglement typically becomes much more robust to noise as the dimension increases. This enables stronger tests of steering [18,19] and even advantages in quantum nonlocality [20,21], leading to device-independence for high-dimensional systems [22][23][24]. In quantum key distribution, higher-dimensional entanglement can lead to higher key-rates [25,26] and to higher tolerance of errors for the security [27].…”

“…The other criterion is based on equiangular measurements (EAMs), among which the most well-known example is the symmetric informationally complete measurement (SIC-POVM) [52,53]. Both these classes of measurements are broadly relevant in quantum information science and they are frequently studied in both theory [54,55] and experiment [19,37,[56][57][58][59][60][61].…”

Quantum Steering That’s Robust to Loss and Noise

“…Like other entanglement phenomena, quantum steering is easily destroyed by noise, limiting its use in applications. Now Mehul Malik of Heriot-Watt University, UK, and his colleagues demonstrate noise-robust, loss-tolerant quantum steering, increasing its technological potential [1].When two parties-Alice and Bob-share a pair of particles in a strongly correlated entangled state, any measurements made on the particles are linked such that measurements made by Alice can be used to predict the outcome of measurements made by Bob. In quantum steering, this correlation goes a step further: by making certain measurements on her particle, Alice can "steer" the quantum state of Bob's particle to take on a specific form.…”

“…Like other entanglement phenomena, quantum steering is easily destroyed by noise, limiting its use in applications. Now Mehul Malik of Heriot-Watt University, UK, and his colleagues demonstrate noise-robust, loss-tolerant quantum steering, increasing its technological potential [1].…”