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Correcting Quantum Errors In Higher Spin Systems
H. F. Chau
I consider the theory of quantum error correcting code (QECC) where each quantum particle has more than two possible eigenstates. In this higher spin system, I report an explicit Q…
How much does it cost to teleport?
H. F. Chau, H. -K. Lo
We show that the entropy of entanglement of a state characterizes its ability to teleport. In particular, in order to teleport faithfully an unknown quantum -state, the two user…
Is Quantum Bit Commitment Really Possible?
Hoi-Kwong Lo, H. F. Chau
We show that all proposed quantum bit commitment schemes are insecure because the sender, Alice, can almost always cheat successfully by using an Einstein-Podolsky-Rosen type of at…
Rotation And Magnetic Evolution Of Superconducting Strange Stars
H. F. Chau
Is pulsar make up of strange matter? The magnetic field decay of a pulsar may be able to give us an answer. Since Cooper pairing of quarks occurs inside a sufficiently cold strange…