4 papers
Quantum Sensing and Quantum Error Correction: Two Sides of the Same Coin
Zhuoran Bao, Daniel F. V. James
Quantum metrology has been making amazing progress in the past decades. It is always in researchers' interest to search for new optimal states that improve parameter estimation. In…
Bell State Analysis Provides an Optimal Basis Saturating the Quantum Cramer-Rao in Rotation Sensing
Zhuoran Bao, Daniel F. V. James
The second-order anti-coherent state of light is known to saturate the Cramer-Rao Bound (QCRB) for rotation sensing around an arbitrary axis. However, due to the complexity of the…
Creating Qubit States with Degenerate Two-level Systems
Zhuoran Bao, Daniel F. V. James
A qubit, or quantum bit, is conventionally defined as "a physical system for storing information that is capable of existing in either of two quantum states or in a superposition o…
Ancilla-Assisted Process Tomography with Bipartiete Mixed Separable States
Zhuoran Bao, Daniel F. V. James
It has been shown that the entanglement between the system and ancillary states is not a strict requirement for performing ancilla-assisted process tomography(AAPT). Instead, from…