it. Nonetheless, we write down Morris-Thorne list below so that we can cite each of these conditions properly. Of course, we have made some changes to adapt this list to the purpose of this paper.

List of properties of a human-traversable wormhole [^2]

1.  Constraints on $b$ and $\Phi$:

    1.  General constraints: \[03032014b\]

        1.  Spatial geometry is that of a wormhole.\[03032014a\]

        2.  Throat is at minimum of $R$, denoted by $R_m$ \[in this case, we have $R_m=b_m\equiv b(R_m)$\]; \[9082013a\]

        3.  We must also have $1-b/R \geq 0$ everywhere; \[9082013b\]

        4.  As $l \to \pm \infty$ we have $b/R \to 0$, where $l=\pm $ (the proper radial distance from wormhole throat as measured by the static observers). \[9082013cc\]

        5.  No horizons or singularities, i.e., $\Phi$ is finite everywhere; \[9082013c\]

        6.  $t$ measures proper time in asymptotically flat regions $\Leftrightarrow$ $\Phi \to 0$ as $l \to \pm \infty$. \[9082013d\]

    2.  Description and constraints of a trip through wormhole ($v$ is the radial velocity of traveler as measured by static observers, and $\gamma\equiv [1-(v/c)^2]^{-1/2}$; $c$ is the speed of light):

        1.  trip begins at $l=-l_1$ with $v=0$ and ends at $l=l_2$ with the same speed; \[9082013dd\]

        2.  gravity is weak at $-l_1$ and 