130 citations · 471 across the 38 of their papers we have counts for
11 papers · 1 filter
Effect of decoherence on the Berry phase of a spin-half in a rotating magnetic field
Xin Li, Yu Shi
We investigate the decoherence effect of a bosonic bath on the Berry phase of a spin-1/2 in a time-dependent magnetic field, without making the Markovian approximation. A two-cycle…
Decoherence of quantum gates based on Aharonov-Anandan phases in a multistep scheme
Xin Li, Yu Shi
We study quantum decoherence of single-qubit and two-qubit Aharonov-Anandan (AA) geometric phase gates realized in a multistep scheme. Each AA gate is also compared with the dynami…
High Energy Quantum Teleportation Using Neutral Koans
Yu Shi
We describe a scheme of stochastic implementations of quantum teleportation and entanglement swapping in terms of neutral kaons. In this scheme, the kaon whose state is to be telep…
Quantum Entanglement of Identical Particles
Yu Shi
We consider entanglement in a system of fixed number of identical particles. Since any operation should be symmetrized over all the identical particles and there is the preconditio…
Quantum Entanglement in Second-quantized Condensed Matter Systems
Yu Shi
The entanglement between occupation-numbers of different single particle basis states depends on coupling between different single particle basis states in the second-quantized Ham…
Entanglement Between Bose-Einstein Condensates
Yu Shi
For a Bose condensate in a double-well potential or with two Josephson-coupled internal states, the condensate wavefunction is a superposition. Here we consider coupling two such B…
Remarks on Universal Quantum Computer
Yu Shi
According to Deutsch, a universal quantum Turing machine (UQTM) is able to perform, in repeating a fixed unitary transformation on the total system, an arbitrary unitary transforma…
Early Gedanken Experiments of Quantum Mechanics Revisited
Yu Shi
The famous gedanken experiments of quantum mechanics have played crucial roles in developing the Copenhagen interpretation. They are studied here from the perspective of standard q…
Remarks on Universal Quantum Computer
Yu Shi
This paper has been superseded by quant-ph/9908074.
Synchronizing Quantum Paths of a Universal Quantum Computer
Yu Shi
This paper has been withdrawn, and will be superseded by another submission.
Spontaneous Symmetry Breaking, Off-diagonal Long-range Order, and Nucleation of Quantum State
Yu Shi
Spontaneous symmetry breaking originats in quantum mechanical measurement of the relevant observable defining the physical situation, order parameter is the average of this observa…