1. Superfluidity and Superconductivity in Double-Layered Quantum Hall state (pdf)

Xiao-Gang Wen and A. Zee
cond-mat/0109560.
 
2. Sideways tunneling and fractional Josephson frequency in double-layered quantum Hall systems (pdf)

Xiao-Gang Wen and A. Zee
Europhys. Lett. 35, 227 (1996). cond-mat/9402025 .
Predicted an AC Josephson effect with a fractional Josephson frequency for certain intralayer tunneling. Not observed yet.
;-(
 
3. A Phenomenological Study of Interlayer Tunneling in Double-Layered Quantum Hall Systems (pdf)

Xiao-Gang Wen and A. Zee
Submitted to PRB in 1994, but was rejected.
:-<
 
4. Tunneling in double-layered quantum Hall systems (pdf)

Xiao-Gang Wen and A. Zee
Phys. Rev. B44, 2265 (1993).
Predicted that the interlayer tunneling in certain double-layer quantum Hall states behaves like tunneling between two superconducting thin films. The prediction was observed by I. B. Spielman et al, Phys. Rev. Lett. 84, 5808 (2000).
;-)
Predicted an AC Josephson-like-effect with a fractional Josephson frequency f=eV/h in interlayer tunneling. Not observed yet.
:=(
 
5. Neutral Superfluid Modes and ``Magnetic'' monopoles in Multi-layered FQH States (pdf)

Xiao-Gang Wen and A. Zee
Phys. Rev. Lett. 69, 1811 (1992).
Predicted a spontaneous U(1) symmetry breaking and related superfluidity/superconductivity in (mmm) double-layer FHQ state (in the absence of interlayer tunneling), which include
• Kosterliz-Thouless transition (not obersved yet)
• a "superconductivity" in the counter flow in the two layers (not observed yet)
• a symmetry breaking gapless Goldstone mode in (mmm) state.
When m=1 we recover the linear gapless mode first found by Fertig in (111) state. The gapless mode was observed in (111) state by I. B. Spielman et al.
:-)
 

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