Quantum portals use Quantum Computers to establish a link through which players can instantaneously travel between two points in the same Minecraft world (intra-server portals) or between a specific point in the world on one Minecraft server and a specific point in the world on a different Minecraft server (inter-server or server-to-server portals). Players can travel through a portal, come out the other side at a pre-set destination and, if they like, take their inventory with them.
Important Notes
Portals only work between points in the same dimension (e.g. you cannot create a portal between the overworld and the nether).
To facilitate portals, all servers involved and the user’s client must have the qCraft mod installed.
You cannot use a portal to gain access to a server to which you would not ordinarily have access if you attempted a normal login (e.g. if you lack the password, are banned, etc.).
Depending on configuration options set by the server admin, it may only be possible for administrators (not ordinary users) to activate portals and/or to establish the initial portal link between two different servers. Administrators may also configure the mod to allow any user to activate portals and/or establish portal links.
Irrespective of who may set up portals (per the above), any user of a server may travel through an existing portal (assuming he also has access to the destination server if travelling inter-server).
When travelling intra-server, your inventory always comes with you.
When travelling inter-server, you will receive a prompt asking you if you want to take your inventory with you. If you select this option, you will be transported to the destination server with your inventory. Note that this will result in you having an empty inventory on the source server (unless you travel back through a portal to the source server with your inventory). If you take your inventory with you, a failure during the connection process to the destination server may result in a loss of your inventory, though if you log back into the source server within 24 hours of the failed attempt, your inventory should be restored. The inventory is added to your current inventory on the destination server (if any).
Un-entangled quantum computers containing quantized data may be transported through a portal in your inventory with the quantized data intact. This can be used to transport, e.g., a structure through a portal by quantizing it, mining the quantum computer and placing it in your inventory, traveling through a portal, constructing a quantizer matrix of the same dimensions and placing the quantum computer in it and de-quantizing.
Constructing a Quantum Portal
Quantum portals are constructed in a manner similar to nether portals. To build one, you will need the following materials:
Obsidian
Full gold blocks
Full glass blocks
Ice
Essence of Observation
Quantum Computer (un-entangled)
1. As with the teleporters, you will need to construct four anchor ODBs. In this case, all four will have the exact same recipe. The blocks should have obsidian in all slots except the two slots along the axis that represents the direction of travel, which should be gold. In other words, when the portal is complete, these ODBs should resolve to gold when viewed from either of the directions through which you can travel through the portal and should resolve to obsidian when viewed from all other directions.
2. Place two of the anchor ODBs on the ground (or wherever you want the base of the portal frame to be) with two empty spaces between them.
3. Place glass blocks in each of the two empty spaces you left in step 2.
4. Place three glass blocks on top of each of the anchor ODBs you placed in Step 2.
5. Place an anchor ODB on top of each of the topmost glass blocks you placed in Step 4.
6. Place two more glass blocks in between the ODBs you placed in Step 5. You should now have a completed frame made of glass with ODBs in each corner.
7. Place a quantum computer (un-entangled) adjacent to the portal frame.
8. Place a block of ice adjacent to the quantum computer (to provide cooling).
Your completed construction should look like this:

Establishing Portal Links and Activating Portals
Note, per the above, that not all users may be permitted to establish portal links on a given server.
1. After constructing the portal, right click on the quantum computer. A GUI will appear.

2. In the ‘This Portal’ field, enter a unique name for this particular portal (e.g. ‘Mushroom Beach’ or ‘Mountain Temple’). If you do not wish to set a destination, you can hit Escape at this point (the name you entered will be saved).
3. If you wish to set up a destination, enter the name of destination portal in the appropriate field.
4. If your destination is on the same server, leave the ‘On This Server’ option active.
5. If your destination is on a different server, click the ‘On This Server’ button to cycle through a list of servers to which connections are allowed. Depending on your admin’s configuration, you may also be able to specify a server address by clicking the ‘+’ button and entering the server address and clicking ‘OK’.
6. Once setup is complete, click ‘Energize’ to activate the portal. The portal will now glow green to indicate its active state:

Portal Mechanics
Though portals may have only one destination at a given time, the portal system allows for a variety of different setups:
If you configure a portal per the above, it represents a one-way quantum tunnel between that portal and its destination portal. Stepping into, e.g. Portal 1 will take you to Portal 2, but not vice versa.
If you repeat the procedure on the destination portal and set up the reciprocal relationship (e.g. Portal 1 → Portal 2 and Portal 2 → Portal 1), you will effectively pair the two portals. In this scenario, entering, e.g., Portal 1 will always send you out at Portal 2 and vice versa.
It is possible to have any number of portals connect to the same destination portal. For example, Portals 1, 2 and 3 could all have a single portal (call it Portal 4) as their destination. This could be used, e.g., to allow players to access a central location from a variety of entry points.
Similarly, you can also daisy chain portals. For example, stepping into Portal 1 could take you to Portal 2. Stepping into Portal 2 could take you to Portal 3, etc.
The above apply to both intra- and inter-server tunnels.
Once a particular portal’s destination is set, it can be viewed by right clicking on the quantum computer. Users with appropriate permissions (depending on server setup) can deactivate a portal, change its destination and reactivate it.
Removing any of the blocks making up the portal frame, the QC or the ice will cause the portal to deactivate. The settings will be saved and the portal can be reactivated by repairing it and re-activating it through the qc GUI.
Once a user who is authorized to create and verify portals on a given server actually travels through an inter-server portal link, he will receive a prompt asking him to verify the connection (accomplished by typing '/qcraft verify' in chat). Once verified, that server will be available to other authorized users of the source server as a destination for them to create their own portals.
Reasons Using an Inter-Server Portal Might Fail
Destination server is not running or is unreachable
Destination server does not have the qCraft mod installed (or is running a different version)
The two servers are running different sets of other (non-qCraft) mods
The destination portal does not exist or is currently not in an active state (this will result in the user being transported to the destination server but to his default location rather than to the foot of the destination portal)
The user is not authorized to access the destinations server (this will likely result in a ‘Connection Refused’ error and the user winding up at the main menu)
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