Entanglement of a nuclear spin qubit register in silicon photonics
Awschalom, D. D., Hanson, R., Wrachtrup, J. & Zhou, B. B. Quantum technologies with optically interfaced solid-state spins.…
Chinese scientists create super stable building block for quantum computers
Chinese physicist Pan Jianwei and his team have created a “quantum Lego block” that refuses to fall apart…
Learning quantum states of continuous-variable systems
Trace distance The trace distance between two quantum states ρ1 and ρ2 is defined as $${d}_{{\rm{tr}}}(\;{\rho }_{1},{\rho }_{2}):=\frac{1}{2}\|{\rho…
Strong coupling of a superconducting flux qubit to single bismuth donors
In this work, we couple spins to a highly non-linear circuit with huge current quantum fluctuations18,19,20. This circuit…
Effective descriptions of bosonic systems can be considered complete
Bosonic quantum information theory Quantum information theory with bosonic systems typically involves modeling unbounded operators over infinite-dimensional Hilbert…
On-chip quantum interference of indistinguishable single photons from integrated independent molecules
Pelucchi, E. et al. The potential and global outlook of integrated photonics for quantum technologies. Nat. Rev. Phys.…
The generalized quantum Stein’s lemma and the second law of quantum resource theories
Nielsen, M. A. & Chuang, I. L. Quantum Computation and Quantum Information: 10th Anniversary Edition (Cambridge Univ. Press,…
Spin environment of a superconducting qubit in high magnetic fields
In Fig. 1 we present the field resilient gralmonium qubit, fabricated from a single layer of grAl (cf. Fig. 1a),…
Entanglement theory with limited computational resources
We now aim to determine the fundamental limits and possibilities of computationally efficient entanglement manipulation. Here the goal…
Individual solid-state nuclear spin qubits with coherence exceeding seconds
Steger, M. et al. Quantum information storage for over 180 s using donor spins in a 28Si semiconductor vacuum.…