You can list the property, but the title company will probably still need the signature by your spouse prior to transferring title to another party. California is a community property state as as such, each spouse has equal rights to all assets, whether they're in only one name or both. Therefore, the title company may need a signature from the other spouse (notarized) that they are aware of the transaction.
I also rely on Steve Beede, or other real estate attorneys, for answering these questions, but a title company might also be able to clarify their procedure for this type of sale. Your realtor could call their 'favorite' title and escrow officer and ask what their policy and procedure is.
So yes, you can list it, but no, you probably can't actually go through with the sale without the signoff of your spouse, I'm guessing.