3 papers
quant-ph2024
Characterization and generation of a SQL-beating catlike state through repetitive measurements
Mamiko Tatsuta, Yuichiro Matsuzaki, Hiroki Kuji +2
Sensitivity in metrology without entanglement is limited by the standard quantum limit (SQL). Recent studies have found that the Heisenberg-limited scaling, the ultimate sensitivit…
quant-ph2021
Entanglement-enhanced sensing using a chain of qubits with always-on nearest-neighbor interactions
Atsuki Yoshinaga, Mamiko Tatsuta, Yuichiro Matsuzaki
Quantum metrology is the use of genuinely quantum properties such as entanglement as a resource to outperform classical sensing strategies. Typically, entanglement is created by im…
quant-ph2019
Quantum metrology with generalized cat states
Mamiko Tatsuta, Yuichiro Matsuzaki, Akira Shimizu
We show a general relationship between a superposition of macroscopically distinct states and sensitivity in quantum metrology. Generalized cat states are defined by using an index…