Scientists have been looking for half an electron as a basis for a quantum computer. They investigated a promising experimental setup just to find that the signals they measured were not telling the truth. Click […]
Quantum computers promise great advances in many fields—from cryptography to the simulation of protein folding. Yet, which physical system works best to build the underlying quantum bits is still an open question. Unlike regular bits […]
Quantum Information and Inference laboratory (QI2-lab) led by Jan Kolodynski at the Centre of New Technologies (CeNT) of the University of Warsaw offers a postdoctoral position within the project Continuously Monitored Quantum Sensors: Smart Tools […]
Quantum 5, 493 (2021). https://doi.org/10.22331/q-2021-07-01-493 Certification of nonlocality of quantum mechanics is an important fundamental test that typically requires prolonged data collection and is only revealed in an in-depth analysis. These features are often particularly […]
Quantum 5, 492 (2021). https://doi.org/10.22331/q-2021-07-01-492 We present a hardware agnostic error mitigation algorithm for near term quantum processors inspired by the classical Lanczos method. This technique can reduce the impact of different sources of noise […]
Understanding the effects of the COVID-19 pandemic on the population means knowing more than just the total number of infections and deaths. As with many diseases, after the acute infection has passed, a constellation of […]
Quantum 5, 491 (2021). https://doi.org/10.22331/q-2021-07-01-491 The quantum approximate optimization algorithm (QAOA) is a prospective near-term quantum algorithm due to its modest circuit depth and promising benchmarks. However, an external parameter optimization required in QAOA could […]
This may be one small step for quantum experimentation, but IBM scientists claim that a recent experiment offers a giant leap in demonstrating how quantum computers can best classical devices at certain tasks. Quantum computing, […]
Quantum 5, 490 (2021). https://doi.org/10.22331/q-2021-07-01-490 We propose a parameter estimation protocol for generalized Pauli channels acting on $d$-dimensional Hilbert space. The salient features of the proposed method include product probe states and measurements, the number […]
Quantum 5, 489 (2021). https://doi.org/10.22331/q-2021-07-01-489 We show that the quantum Fisher information attained in an adiabatic approach to critical quantum metrology cannot lead to the Heisenberg limit of precision and therefore $regular$ quantum metrology under […]
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