A technique relates to configuring a superconducting router. The superconducting router is operated in a first mode. Ports are configured to be in reflection in the first mode in order to reflect a signal. The superconducting router is operated in a second mode. A given pair of the ports is connected together and in transmission in the second mode, such that the signal is permitted to pass between the given pair of the ports.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A method of configuring a superconducting router, the method comprising: operating the superconducting router in a first mode, wherein ports are configured to be in reflection in the first mode in order to reflect a signal; and operating the superconducting router in a second mode, wherein a given pair of the ports is connected together and in transmission in the second mode, such that the signal is permitted to pass between the given pair of the ports. 2. The method of claim 1, wherein the ports are in reflection in the first mode for a predefined frequency of the signal. 3. The method of claim 1, wherein the given pair of the ports are in transmission in the second mode for a predefined frequency. 4. The method of claim 1, wherein the ports are configured to be isolated from one another, such that any port is controllable to be separated from another port. 5. The method of claim 1, wherein the superconducting router comprises superconducting materials. 6. The method of claim 1, wherein the superconducting router comprises tunable filters associated with the ports, such that the tunable filters are controllable to operate in the first mode and the second mode. 7. The method of claim 6, wherein the tunable filters are configured to be operated as an open switch and a closed switch according to the first and second modes. 8. The method of claim 1, wherein in the second mode, the given pair of the ports is in transmission while other ports of the ports are in reflection for a predefined frequency of the signal. 9. The method of claim 1, wherein the signal is in a microwave domain. 10. The method of claim 1, wherein the given pair of the ports are time dependent, such that a selection of the given pair of the ports are configured to change according to a defined time scheme. 11. The method of claim 1, wherein the given pair of the ports are configured to be arbitrarily selected from the ports. 12. The method of claim 1, wherein the given pair of the ports are configured to be selected from the ports at a defined time. 13. The method of claim 1, wherein the superconducting router is a lossless microwave switch having superconducting materials. 14. A method of configuring a superconducting circulator, the method comprising: operating the superconducting circulator to receive a readout signal at an input port while an output port is in reflection, wherein the readout signal is to be transmitted through a common port to a quantum system, wherein the readout signal is configured to cause a reflected readout signal to resonate back from the quantum system; and operating the superconducting circulator to output the reflected readout signal at the output port while the input port is in reflection. 15. The method of claim 14, wherein a delay line delays transmission of the readout signal and the reflected readout signal. 16. The method of claim 15, further comprising providing a transition time to switch between operating the input port in transmission to operating the input port in reflection, wherein the delay line causes the transition time. 17. The method of claim 14, wherein the quantum system includes a readout resonator operatively connected to a qubit. 18. The method of claim 17, wherein the reflected readout signal includes quantum information of the qubit. 19. The method of claim 14, wherein a first tunable filter is connected to the input port, such that the first tunable filter permits the input port to operate in transmission or reflection; and wherein a second tunable filter is connected to the output port, such that the second tunable filter permits the output port to operate in transmission or reflection. 20. The method of claim 14, wherein the circulator is a lossless microwave switch having superconducting materials. 21. A superconducting router comprising: ports configured to operate in a first mode and a second mode, wherein in the first mode the ports are configured to be in reflection in order to reflect a signal; and a given pair of the ports configured to operate in the second mode, wherein in the second mode the given pair of the ports is connected together and in transmission, such that the signal is permitted to pass between the given pair of the ports. 22. The superconducting router of claim 21, wherein the ports are in reflection in the first mode for a predefined frequency of the signal; and wherein the given pair of the ports is in transmission in the second mode for the predefined frequency. 23. The superconducting router of claim 21, wherein tunable filters are associated with the ports, such that the tunable filters are controllable to operate in the first mode and the second mode. 24. A superconducting circulator comprising: an input port connected to a first tunable filter such that the input port is configured to operate in a first mode and a second mode; and an output port connected to a second tunable filter such that the output port is configured to operate in the first mode and the second mode, wherein in the first mode the input port is configured to receive a readout signal while the output port is in reflection, wherein the readout signal is to be transmitted through a common port to a quantum system, wherein the readout signal is configured to cause a reflected readout signal to resonate back from the quantum system, wherein in the second mode the output port is configured to output the reflected readout signal while the input port is in reflection. 25. A system comprising: a quantum system; and a superconducting microwave switch connected to the quantum system, wherein the superconducting microwave switch is configured to receive a readout signal at an input port, wherein the readout signal is to be transmitted through a common port to the quantum system, wherein the superconducting microwave switch is configured to output a reflected readout signal at an output port, the reflected readout signal being from the quantum system.