443 citations · 467 across the 5 of their papers we have counts for
5 papers
Weak Value and Correlation Function
Takahiro Sagawa
We show that there exists, in quantum theory, a close relationship between the weak value and the correlation function, which sheds new lights on the concept of the weak value.
Second Law of Thermodynamics with Discrete Quantum Feedback Control
Takahiro Sagawa, Masahito Ueda
A new thermodynamic inequality is derived which leads to the maximum work that can be extracted from multi-heat baths with the assistance of discrete quantum feedback control. The…
Accuracy matrix in generalized simultaneous measurement of a qubit system
Takahiro Sagawa, Masahito Ueda
We formulate the accuracy of quantum measurement for a qubit system in terms of a 3 by 3 matrix. This matrix, which we refer to as the accuracy matrix, can be calculated from a pos…
Upper bound on our knowledge about noncommuting observables for a qubit system
Yuji Kurotani, Takahiro Sagawa, Masahito Ueda
A trade-off relation on our knowledge about two noncommuting observables of a qubit system in simultaneous measurement is formulated. The obtained inequality offers a quantitative…
Jarzynski Equality with Maxwell's Demon
Takahiro Sagawa, Masahito Ueda
We propose a new thermodynamic equality and several inequalities concerning the relationship between work and information for an isothermal process with Maxwell's demon. Our approa…