108 citations · 1.2k across the 67 of their papers we have counts for
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Weak value amplification and the lifetime of decaying particle
Yuichiro Mori, Izumi Tsutsui
We study the possibility of varying the measured lifetime of a decaying particle based on the technique of weak value amplification in which an additional filtering process called…
Weak Value Amplification in High Energy Physics: A Case Study for Precision Measurement of CP Violation in B Meson Decays
Satoshi Higashino, Yuichiro Mori, Yosuke Takubo +3
The technique of weak value amplification, proposed by Aharonov et al. in 1988, has been applied for various fields of physics for the purpose of precision measurement, which is ma…
Uncertainty Relations of Variances in View of the Weak Value
Jaeha Lee, Keita Takeuchi, Kaisei Watanabe +1
The Schr{ö}dinger inequality is known to underlie the Kennard-Robertson inequality, which is the standard expression of quantum uncertainty for the product of variances of two obse…
A Universal Formulation of Uncertainty Relation for Error and Disturbance
Jaeha Lee, Izumi Tsutsui
We present a universal formulation of uncertainty relation valid for any conceivable quantum measurement and the resultant observation (observer) effect of statistical nature. Owin…
Geometric Formulation of Universally Valid Uncertainty Relation for Error
Jaeha Lee, Izumi Tsutsui
We present a new geometric formulation of uncertainty relation valid for any quantum measurements of statistical nature. Owing to its simplicity and tangibility, our relation is un…
Secure random number generation from parity symmetric radiations
Toyohiro Tsurumaru, Toshihiko Sasaki, Izumi Tsutsui
The random number generators (RNGs) are an indispensable tool in cryptography. Of various types of RNG method, those using radiations from nuclear decays (radioactive RNG) has a re…
On the Validity of Weak Measurement Applied for Precision Measurement
Yuichiro Mori, Jaeha Lee, Izumi Tsutsui
We present a general framework of examining the validity of weak measurement -- the standard procedure to acquire Aharonov's weak value -- which has been used intensively in recent…
When photons are lying about where they have been
Lev Vaidman, Izumi Tsutsui
The past of the photon in a nested Mach-Zehnder interferometer with an inserted Dove prism is analyzed. It is argued that the Dove prism does not change the past of the photon. Alo…
On Quantisations, Quasi-probabilities and the Weak Value
Jaeha Lee, Izumi Tsutsui
We propose a general framework of the quantum/quasi-classical transformations by introducing the concept of quasi-joint-spectral distribution (QJSD). Specifically, we show that the…
Quasi-probabilities in Conditioned Quantum Measurement and a Geometric/Statistical Interpretation of Aharonov's Weak Value
Jaeha Lee, Izumi Tsutsui
We show that the joint behaviour of an arbitrary pair of quantum observables can be described by quasi-probabilities, which are extensions of the standard probabilities used for de…
Weak Value, Quasiprobability and Bohmian Mechanics
Kazuki Fukuda, Jaeha Lee, Izumi Tsutsui
We clarify the significance of quasiprobability (QP) in quantum mechanics that is relevant in describing physical quantities associated with a transition process. Our basic quantit…
Uncertainty Relations for Approximation and Estimation
Jaeha Lee, Izumi Tsutsui
We present a versatile inequality of uncertainty relations which are useful when one approximates an observable and/or estimates a physical parameter based on the measurement of an…
Quantum Trajectories based on the Weak Value
Takuya Mori, Izumi Tsutsui
The notion of trajectory of an individual particle is strictly inhibited in quantum mechanics because of the uncertainty principle. Nonetheless, the weak value, which has been prop…
Weak Value and the Wave-Particle Duality
Takuya Mori, Izumi Tsutsui
The weak value, introduced by Aharonov et al. to extend the conventional scope of physical observables in quantum mechanics, is an intriguing concept which sheds new light on quant…
Uncertainty of Weak Measurement and Merit of Amplification
Jaeha Lee, Izumi Tsutsui
Aharonov's weak value, which is a physical quantity obtainable by weak measurement, admits amplification and hence is deemed to be useful for precision measurement. We examine the…
Universal Separability and Entanglement in Identical Particle Systems
Toshihiko Sasaki, Tsubasa Ichikawa, Izumi Tsutsui
Entanglement is known to be a relative notion, defined with respect to the choice of physical observables to be measured (i.e., the measurement setup used). This implies that, in g…
Complex Probability Measure and Aharonov's Weak Value
Tatsuya Morita, Toshihiko Sasaki, Izumi Tsutsui
We present a complex probability measure relevant for double (pairs of) states in quantum mechanics, as an extension of the standard probability measure for single states that unde…
Entanglement of Indistinguishable Particles
Toshihiko Sasaki, Tsubasa Ichikawa, Izumi Tsutsui
We present a general criterion for entanglement of N indistinguishable particles decomposed into arbitrary s subsystems based on the unambiguous measurability of correlation. Our a…
Outcome Independence of Entanglement in One-Way Computation
Toshihiko Sasaki, Tsubasa Ichikawa, Izumi Tsutsui
We show that the various intermediate states appearing in the process of one-way computation at a given step of measurement are all equivalent modulo local unitary transformations.…
Separability of N-particle Fermionic States for Arbitrary Partitions
Tsubasa Ichikawa, Toshihiko Sasaki, Izumi Tsutsui
We present a criterion of separability for arbitrary s partitions of N-particle fermionic pure states. We show that, despite the superficial non-factorizability due to the antisymm…
Quantum Force Induced on a Partition Wall in a Harmonic Potential
T. Fulop, I. Tsutsui
Boundary effects in quantum mechanics are examined by considering a partition wall inserted at the centre of a harmonic oscillator system. We put an equal number of particles on bo…
Entanglement Measures for Intermediate Separability of Quantum States
Tsubasa Ichikawa, Toshihiko Sasaki, Izumi Tsutsui
We present a family of entanglement measures R_m which act as indicators for separability of n-qubit quantum states into m subsystems for arbitrary 2 \leq m \leq n. The measure R_m…
Testing the EPR Locality using B-Mesons
Tsubasa Ichikawa, Satoshi Tamura, Izumi Tsutsui
We study the possibility of testing local realistic theory (LRT), envisioned implicitly by Einstein, Podolsky and Rosen in 1935, based on the Bell inequality for the correlations i…
Exchange Symmetry and Multipartite Entanglement
Tsubasa Ichikawa, Toshihiko Sasaki, Izumi Tsutsui +1
Entanglement of multipartite systems is studied based on exchange symmetry under the permutation group S_N. With the observation that symmetric property under the exchange of two c…