Tunable two-qubit couplers offer an avenue to mitigate errors in multiqubit superconducting quantum processors. However, most operate a narrow frequency band and target specific couplings, such as the spurious $ZZ$ interaction. We introduce coupler that alleviates these limitations by suppressing all interactions with exponentially large on-off ratio without need for fine-tuning. Our approach i...

this paper analyzes a renewal input  working vacations queue with change over times and bernoulli schedulevacation interruption under (a,c,b) policy.the service and vacation times are exponentially distributed.the server begins service if there are at least c units in the queue and the service takes place in batches with a minimum of size a and a maximum of size b (a