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11 papers · 2 filters
A Simple Scheme to Entangle Distant Qubits from a Mixed State via an Entanglement Mediator
Kazuya Yuasa, Hiromichi Nakazato
A simple scheme to prepare an entanglement between two separated qubits from a given mixed state is proposed. A single qubit (entanglement mediator) is repeatedly made to interact…
Quantum Diagonalization Method in the Tavis-Cummings Model
Kazuyuki Fujii, Kyoko Higashida, Ryosuke Kato +2
To obtain the explicit form of evolution operator in the Tavis-Cummings model we must calculate the term explicitly which is v…
Explicit Form of the Evolution Operator of Tavis-Cummings Model : Three and Four Atoms Cases
Kazuyuki Fujii, Kyoko Higashida, Ryosuke Kato +2
In this letter the explicit form of evolution operator of the Tavis-Cummings model with three and four atoms is given. This is an important progress in quantum optics or mathematic…
Initial state maximizing the nonexponentially decaying survival probability for unstable multilevel systems
Manabu Miyamoto
The long-time behavior of the survival probability for unstable multilevel systems that follows the power-decay law is studied based on the N-level Friedrichs model, and is shown t…
Steering Distillation by "Pulsed" and "Continuous" Measurements
B. Militello, H. Nakazato, A. Messina
A new systematic strategy for steering the distillation process for a quantum system, that utilizes the so-called "pulsed" and "continuous" measurements on another quantum system i…
Distillation of Entanglement between Distant Systems by Repeated Measurements on Entanglement Mediator
G. Compagno, A. Messina, H. Nakazato +3
A recently proposed purification method, in which the Zeno-like measurements of a subsystem can bring about a distillation of another subsystem in interaction with the former, is u…