We propose and analyze a new approach based on quantum error correction (QEC)\nto improve quantum metrology in the presence of noise. We identify the\nconditions under which QEC allows one to improve the signal-to-noise ratio in\nquantum-limited measurements, and we demonstrate that it ...
Experimentally achieving the precision that standard quantum metrology schemes promise is always challenging. Recently, additional controls were applied to design feasible quantum metrology schemes. However, these approaches generally does not consider e
D. Quantum error correction for metrology. Phys. Rev. Lett. 112, 150802 (2014). Article ADS Google Scholar Herrera-Martí, D. A., Gefen T., Aharonov, D., Katz, N. & Retzker A. Quantum error-correction-enhanced magnetometer overcoming the limit imposed by relaxation. Phy. Rev. Lett....
Another helpful insight is that error correction can be more effective if we know when and where the errors occur in a quantum circuit. We can apply this idea using a dual rail encoding of the qubits. With two microwave resonators, for example, we can encode a qubit by placing a single ...
(CTCs), hypothetical worldlines that travel backward in time. CTCs are consistent with general relativity, but we don’t know whether they exist in reality. Regardless, one can simulate CTCs, using entanglement. Collaborators and IappliedCTC simulations tometrology—to protocols for measuring ...
Quantum Metrology Enhanced by Repetitive Quantum Error Correction The accumulation of quantum phase in response to a signal is the central mechanism of quantum sensing, as such, loss of phase information presents a fundam... T Unden,P Balasubramanian,D Louzon,... - 《Physical Review Letters》 被...
Continuous Symmetries and Approximate Quantum Error Correction Quantum error correction and symmetry arise in many areas of physics, including many-body systems, metrology in the presence of noise, fault-tolerant computation, and holographic quantum gravity. Here, we study the compatibility of these......
Interaction-based quantum metrology showing scaling beyond the Heisenberg limit. Quantum metrology aims to use entanglement and other quantum resources to improve precision measurement. An interferometer using N independent particles to measure a parameter can achieve at best the standard quantum limit of ...
High-performance control of quantum dynamics is key to the development of quantum technologies.From quantum-state engineering to quantum metrology,theory a... W Dong,R Wu,X Yuan,... - 《Science Bulletin》 被引量: 10发表: 2015年 Techniques for noise suppression and robust control in spin-base...
D. Quantum error correction for metrology. Phys. Rev. Lett. 112, 150802 (2014). Article ADS Google Scholar Dür, W., Skotiniotis, M., Fröwis, F. & Kraus, B. Improved quantum metrology using quantum error correction. Phys. Rev. Lett. 112, 080801 (2014). Article ADS MATH Google ...