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Sub-Hertz resonance by weak measurement
Weizhi Qu, Jian Sun, Shenchao Jin +3
Weak measurement (WM) with state pre- and post-selection can amplify otherwise undetectable small signals and thus promise great potentials in precision measurements. Although freq…
Ancilla-free quantum error correction codes for quantum metrology
David Layden, Sisi Zhou, Paola Cappellaro +1
Quantum error correction has recently emerged as a tool to enhance quantum sensing under Markovian noise. It works by correcting errors in a sensor while letting a signal imprint o…
Enhanced energy-constrained quantum communication over bosonic Gaussian channels
Kyungjoo Noh, Stefano Pirandola, Liang Jiang
Quantum communication is an important branch of quantum information science, promising unconditional security to classical communication and providing the building block of a futur…
Quantum repeater architecture with hierarchically optimized memory buffer times
Siddhartha Santra, Liang Jiang, Vladimir Malinovsky
We propose a quantum repeater protocol and architecture that mitigates decoherence of the entangled states by optimizing the quantum memory buffer time. The protocol maximizes the…
Saturating the quantum Cramér-Rao bound using LOCC
Sisi Zhou, Chang-Ling Zou, Liang Jiang
The quantum Cramér-Rao bound (QCRB) provides an ultimate precision limit allowed by quantum mechanics in parameter estimation. Given any quantum state dependent on a single paramet…
Engineering bilinear mode coupling in circuit QED: Theory and experiment
Yaxing Zhang, Brian J. Lester, Yvonne Y. Gao +3
Photonic states of superconducting microwave cavities controlled by transmon ancillas provide a platform for encoding and manipulating quantum information. A key challenge in scali…