Should central bank raise interest rates during a condition of liquidity trap? I was studying about liquidity traps and understood it fairly well that according to widespread beliefs the monetary policy turns out to be ineffective as nominal interest rates are close to zero and the public has deflationary expectations. Since nominal rates are close to zero nobody wants to hold financial assets and prefer cash instead. 
My question here is that in such a condition when nobody is investing in bonds, should not the central bank raise interest rates to give higher incentive to bond holders. I know I am missing some point but can someone please explain this relationship between interest rates, inflation and bonds in the context of liquidity trap.
In rough terms the central bank wants the nominal interest rates low so as a) to incentivize people to consume their income rather than save it and b) to make loans more attractive as they are linked with lower interest, thus bolstering consumption (again). During a crisis however, consumption remains low as expectations of economic growth deteriorate. Moreover, as interest rates are low, there is no point in saving money into the banks. Thus, people choose to hoard money, essentially removing it from the economy. With less money in the banking system and a generally pessimistic economic environment, banks become more skeptical towards providing loans as they doubt that they will get their investment back. All these processes empower the endurance of the vicious circle of the liquidity trap.

In theory, such prolonged periods of near zero interest rates would mean higher inflation. However, the recent crisis has proven that zero interest rates and stable inflation can co-exist. Therefore, the central bank has, up until now, been reluctant towards increasing the interest rates and in the past years it has made sure to inform the public that it is going to keep them quite low for some time (forward guidance). There is a whole debate of whether low interest rates are or should be linked with high inflation during financial crises and recently we see a drift, especially in the US, towards an interest rate increase even though it has not yet materialized.

Bonds are not considered a "go to" solution under a liquidity trap as their demand is really low. This stems from the fact that when a government faces a recession, its bonds are not considered a safe investment as they are paired with a high interest rate. Thus, the public awaits that they are unlikely to be honoured in the future. And if the recent financial crisis has taught us anything is that even bond holders are not safe.